MySQLHelper1.cs

using System;
using System.Collections;
using System.Data;
using MySql.Data.MySqlClient;
using System.Linq;
using System.Xml;

namespace OBALog.Data
{
    [System.Diagnostics.DebuggerStepThrough]
    public static class MySqlHelper
    {
        internal static int Timeout = 180;

        #region private utility methods & constructors

        // Since this class provides only static methods, make the default constructor private to prevent 
        // instances from being created with "new SqlHelper()"

        /// <summary>
        /// This method is used to attach array of MySqlParameters to a MySqlCommand.
        /// 
        /// This method will assign a value of DbNull to any parameter with a direction of
        /// InputOutput and a value of null.  
        /// 
        /// This behavior will prevent default values from being used, but
        /// this will be the less common case than an intended pure output parameter (derived as InputOutput)
        /// where the user provided no input value.
        /// </summary>
        /// <param name="command">The command to which the parameters will be added</param>
        /// <param name="commandParameters">An array of MySqlParameters to be added to command</param>
        private static void AttachParameters(MySqlCommand command, MySqlParameter[] commandParameters)
        {
            if (command == null) throw new ArgumentNullException("command");
            if (commandParameters != null)
            {
                foreach (MySqlParameter p in commandParameters.Where(p => p != null))
                {
                    // Check for derived output value with no value assigned
                    if ((p.Direction == ParameterDirection.InputOutput ||
                         p.Direction == ParameterDirection.Input) &&
                        (p.Value == null))
                    {
                        p.Value = DBNull.Value;
                    }
                    command.Parameters.Add(p);
                }
            }
        }

        /// <summary>
        /// This method assigns dataRow column values to an array of MySqlParameters
        /// </summary>
        /// <param name="commandParameters">Array of MySqlParameters to be assigned values</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values</param>
        private static void AssignParameterValues(MySqlParameter[] commandParameters, DataRow dataRow)
        {
            if ((commandParameters == null) || (dataRow == null))
            {
                // Do nothing if we get no data
                return;
            }

            int i = 0;
            // Set the parameters values
            foreach (MySqlParameter commandParameter in commandParameters)
            {
                // Check the parameter name
                if (commandParameter.ParameterName == null ||
                    commandParameter.ParameterName.Length <= 1)
                    throw new Exception(string.Format("Please provide a valid parameter name on the parameter #{0}, the ParameterName property has the following value: '{1}'.", i, commandParameter.ParameterName));
                if (dataRow.Table.Columns.IndexOf(commandParameter.ParameterName.Substring(1)) != -1)
                    commandParameter.Value = dataRow[commandParameter.ParameterName.Substring(1)];
                i++;
            }
        }

        /// <summary>
        /// This method assigns an array of values to an array of MySqlParameters
        /// </summary>
        /// <param name="commandParameters">Array of MySqlParameters to be assigned values</param>
        /// <param name="parameterValues">Array of objects holding the values to be assigned</param>
        private static void AssignParameterValues(MySqlParameter[] commandParameters, object[] parameterValues)
        {
            if ((commandParameters == null) || (parameterValues == null))
            {
                // Do nothing if we get no data
                return;
            }

            // We must have the same number of values as we pave parameters to put them in
            if (commandParameters.Length != parameterValues.Length)
            {
                throw new ArgumentException("Parameter count does not match Parameter Value count.");
            }

            // Iterate through the MySqlParameters, assigning the values from the corresponding position in the 
            // value array
            for (int i = 0, j = commandParameters.Length; i < j; i++)
            {
                // If the current array value derives from IDbDataParameter, then assign its Value property
                if (parameterValues[i] is IDbDataParameter)
                {
                    IDbDataParameter paramInstance = (IDbDataParameter)parameterValues[i];
                    commandParameters[i].Value = paramInstance.Value ?? DBNull.Value;
                }
                else if (parameterValues[i] == null)
                {
                    commandParameters[i].Value = DBNull.Value;
                }
                else
                {
                    commandParameters[i].Value = parameterValues[i];
                }
            }
        }

        /// <summary>
        /// This method opens (if necessary) and assigns a connection, transaction, command type and parameters 
        /// to the provided command
        /// </summary>
        /// <param name="command">The MySqlCommand to be prepared</param>
        /// <param name="connection">A valid MySqlConnection, on which to execute this command</param>
        /// <param name="transaction">A valid MySqlTransaction, or 'null'</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
        /// <param name="mustCloseConnection"><c>true</c> if the connection was opened by the method, otherwose is false.</param>
        private static void PrepareCommand(MySqlCommand command, MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters, out bool mustCloseConnection)
        {
            if (command == null) throw new ArgumentNullException("command");
            if (string.IsNullOrEmpty(commandText)) throw new ArgumentNullException("commandText");

            // If the provided connection is not open, we will open it
            if (connection.State != ConnectionState.Open)
            {
                mustCloseConnection = true;
                connection.Open();
            }
            else
            {
                mustCloseConnection = false;
            }

            // Associate the connection with the command
            command.Connection = connection;

            // Set the command text (stored procedure name or SQL statement)
            command.CommandText = commandText;

            // If we were provided a transaction, assign it
            if (transaction != null)
            {
                if (transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or committed, please provide an open transaction.", "transaction");
                command.Transaction = transaction;
            }

            // Set the command type
            command.CommandType = commandType;

            // Attach the command parameters if they are provided
            if (commandParameters != null)
            {
                AttachParameters(command, commandParameters);
            }
            return;
        }

        #endregion private utility methods & constructors

        #region ExecuteNonQuery

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the database specified in 
        /// the connection string
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteNonQuery(connectionString, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset) against the database specified in the connection string 
        /// using the provided parameters
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");

            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                return ExecuteNonQuery(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored prcedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteNonQuery(connection, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (connection == null) throw new ArgumentNullException("connection");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            // Finally, execute the command
            int retval = cmd.ExecuteNonQuery();

            // Detach the MySqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();
            if (mustCloseConnection)
                connection.Close();
            return retval;
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlConnection connection, string spName, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteNonQuery(transaction, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns no resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or committed, please provide an open transaction.", "transaction");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Finally, execute the command
            int retval = cmd.ExecuteNonQuery();

            // Detach the MySqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified 
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQuery(MySqlTransaction transaction, string spName, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or committed, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteNonQuery

        #region ExecuteDataSet

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
        /// the connection string. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataSet(connectionString, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");

            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                return ExecuteDataSet(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(string connectionString, string spName, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataSet(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataSet(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlConnection connection, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataSet(connection, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (connection == null) throw new ArgumentNullException("connection");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataSet
            using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();

                // Fill the DataSet using default values for DataTable names, etc
                da.Fill(ds);

                // Detach the MySqlParameters from the command object, so they can be used again
                cmd.Parameters.Clear();

                if (mustCloseConnection)
                    connection.Close();

                // Return the dataset
                return ds;
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlConnection connection, string spName, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataSet(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataSet(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlTransaction transaction, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataSet(transaction, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataSet
            using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
            {
                DataSet ds = new DataSet();

                // Fill the DataSet using default values for DataTable names, etc
                da.Fill(ds);

                // Detach the MySqlParameters from the command object, so they can be used again
                cmd.Parameters.Clear();

                // Return the dataset
                return ds;
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified 
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataSet ds = ExecuteDataSet(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDataSet(MySqlTransaction transaction, string spName, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataSet(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataSet(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteDataSet

        #region ExecuteDataTable

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
        /// the connection string. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataTable(connectionString, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");

            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                return ExecuteDataTable(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(string connectionString, string spName, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataTable(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataTable(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlConnection connection, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataTable(connection, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (connection == null) throw new ArgumentNullException("connection");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataTable
            using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
            {
                DataTable ds = new DataTable();

                // Fill the DataTable using default values for DataTable names, etc
                da.Fill(ds);

                // Detach the MySqlParameters from the command object, so they can be used again
                cmd.Parameters.Clear();

                if (mustCloseConnection)
                    connection.Close();

                // Return the DataTable
                return ds;
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlConnection connection, string spName, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataTable(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataTable(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlTransaction transaction, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteDataTable(transaction, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataTable
            using (MySqlDataAdapter da = new MySqlDataAdapter(cmd))
            {
                DataTable ds = new DataTable();

                // Fill the DataTable using default values for DataTable names, etc
                da.Fill(ds);

                // Detach the MySqlParameters from the command object, so they can be used again
                cmd.Parameters.Clear();

                // Return the DataTable
                return ds;
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified 
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  DataTable ds = ExecuteDataTable(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A DataTable containing the resultset generated by the command</returns>
        public static DataTable ExecuteDataTable(MySqlTransaction transaction, string spName, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteDataTable(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteDataTable(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteDataTable

        #region ExecuteReader

        /// <summary>
        /// This enum is used to indicate whether the connection was provided by the caller, or created by SqlHelper, so that
        /// we can set the appropriate CommandBehavior when calling ExecuteReader()
        /// </summary>
        private enum MySqlConnectionOwnership
        {
            /// <summary>Connection is owned and managed by SqlHelper</summary>
            Internal,
            /// <summary>Connection is owned and managed by the caller</summary>
            External
        }

        /// <summary>
        /// Create and prepare a MySqlCommand, and call ExecuteReader with the appropriate CommandBehavior.
        /// </summary>
        /// <remarks>
        /// If we created and opened the connection, we want the connection to be closed when the DataReader is closed.
        /// 
        /// If the caller provided the connection, we want to leave it to them to manage.
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection, on which to execute this command</param>
        /// <param name="transaction">A valid MySqlTransaction, or 'null'</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
        /// <param name="connectionOwnership">Indicates whether the connection parameter was provided by the caller, or created by SqlHelper</param>
        /// <returns>MySqlDataReader containing the results of the command</returns>
        private static MySqlDataReader ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters, MySqlConnectionOwnership connectionOwnership)
        {
            if (connection == null) throw new ArgumentNullException("connection");

            bool mustCloseConnection = false;
            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            try
            {
                PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

                // Create a reader

                // Call ExecuteReader with the appropriate CommandBehavior
                var dataReader = connectionOwnership == MySqlConnectionOwnership.External ? cmd.ExecuteReader() : cmd.ExecuteReader(CommandBehavior.CloseConnection);

                // Detach the MySqlParameters from the command object, so they can be used again.
                // HACK: There is a problem here, the output parameter values are fletched 
                // when the reader is closed, so if the parameters are detached from the command
                // then the SqlReader can´t set its values. 
                // When this happen, the parameters can´t be used again in other command.
                bool canClear = true;
                foreach (MySqlParameter commandParameter in cmd.Parameters)
                {
                    if (commandParameter.Direction != ParameterDirection.Input)
                        canClear = false;
                }

                if (canClear)
                {
                    cmd.Parameters.Clear();
                }

                return dataReader;
            }
            catch
            {
                if (mustCloseConnection)
                    connection.Close();
                throw;
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
        /// the connection string. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteReader(connectionString, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            MySqlConnection connection = null;
            try
            {
                connection = new MySqlConnection(connectionString);
                connection.Open();

                // Call the private overload that takes an internally owned connection in place of the connection string
                return ExecuteReader(connection, null, commandType, commandText, commandParameters, MySqlConnectionOwnership.Internal);
            }
            catch
            {
                // If we fail to return the SqlDatReader, we need to close the connection ourselves
                if (connection != null) connection.Close();
                throw;
            }

        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                AssignParameterValues(commandParameters, parameterValues);

                return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteReader(connection, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            // Pass through the call to the private overload using a null transaction value and an externally owned connection
            return ExecuteReader(connection, (MySqlTransaction)null, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlConnection connection, string spName, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                AssignParameterValues(commandParameters, parameterValues);

                return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteReader(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteReader(transaction, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///   MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // Pass through to private overload, indicating that the connection is owned by the caller
            return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  MySqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, string spName, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                AssignParameterValues(commandParameters, parameterValues);

                return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteReader

        #region ExecuteScalar

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in 
        /// the connection string. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteScalar(connectionString, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset) against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                return ExecuteScalar(connection, commandType, commandText, commandParameters);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteScalar(connection, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (connection == null) throw new ArgumentNullException("connection");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };

            bool mustCloseConnection = false;
            PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters, out mustCloseConnection);

            // Execute the command & return the results
            object retval = cmd.ExecuteScalar();

            // Detach the MySqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();

            if (mustCloseConnection)
                connection.Close();

            return retval;
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlConnection connection, string spName, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText)
        {
            // Pass through the call providing null for the set of MySqlParameters
            return ExecuteScalar(transaction, commandType, commandText, (MySqlParameter[])null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");

            // Create a command and prepare it for execution
            MySqlCommand cmd = new MySqlCommand() { CommandTimeout = Timeout };
            bool mustCloseConnection = false;
            PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Execute the command & return the results
            object retval = cmd.ExecuteScalar();

            // Detach the MySqlParameters from the command object, so they can be used again
            cmd.Parameters.Clear();
            return retval;
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalar(MySqlTransaction transaction, string spName, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // PPull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion ExecuteScalar

        #region FillDataset
        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
        /// the connection string. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)</param>
        public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");

            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                FillDataset(connection, commandType, commandText, dataSet, tableNames);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        public static void FillDataset(string connectionString, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                FillDataset(connection, commandType, commandText, dataSet, tableNames, commandParameters);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  FillDataset(connString, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, 24);
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>    
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        public static void FillDataset(string connectionString, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            // Create & open a MySqlConnection, and dispose of it after we are done
            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                connection.Open();

                // Call the overload that takes a connection in place of the connection string
                FillDataset(connection, spName, dataSet, tableNames, parameterValues);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>    
        public static void FillDataset(MySqlConnection connection, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            FillDataset(connection, commandType, commandText, dataSet, tableNames, null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(conn, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        public static void FillDataset(MySqlConnection connection, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params MySqlParameter[] commandParameters)
        {
            FillDataset(connection, null, commandType, commandText, dataSet, tableNames, commandParameters);
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  FillDataset(conn, "GetOrders", ds, new string[] {"orders"}, 24, 36);
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        public static void FillDataset(MySqlConnection connection, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                FillDataset(connection, CommandType.StoredProcedure, spName, dataSet, tableNames);
            }
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"});
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        public static void FillDataset(MySqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames)
        {
            FillDataset(transaction, commandType, commandText, dataSet, tableNames, null);
        }

        /// <summary>
        /// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        public static void FillDataset(MySqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params MySqlParameter[] commandParameters)
        {
            FillDataset(transaction.Connection, transaction, commandType, commandText, dataSet, tableNames, commandParameters);
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified 
        /// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <remarks>
        /// This method provides no access to output parameters or the stored procedure's return value parameter.
        /// 
        /// e.g.:  
        ///  FillDataset(trans, "GetOrders", ds, new string[]{"orders"}, 24, 36);
        /// </remarks>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="parameterValues">An array of objects to be assigned as the input values of the stored procedure</param>
        public static void FillDataset(MySqlTransaction transaction, string spName, DataSet dataSet, string[] tableNames, params object[] parameterValues)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (dataSet == null) throw new ArgumentNullException("dataSet");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If we receive parameter values, we need to figure out where they go
            if ((parameterValues != null) && (parameterValues.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Assign the provided values to these parameters based on parameter order
                AssignParameterValues(commandParameters, parameterValues);

                // Call the overload that takes an array of MySqlParameters
                FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames, commandParameters);
            }
            else
            {
                // Otherwise we can just call the SP without params
                FillDataset(transaction, CommandType.StoredProcedure, spName, dataSet, tableNames);
            }
        }

        /// <summary>
        /// Private helper method that execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction and MySqlConnection
        /// using the provided parameters.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  FillDataset(conn, trans, CommandType.StoredProcedure, "GetOrders", ds, new string[] {"orders"}, new MySqlParameter("@prodid", 24));
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection</param>
        /// <param name="transaction">A valid MySqlTransaction</param>
        /// <param name="commandType">The CommandType (stored procedure, text, etc.)</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="dataSet">A dataset wich will contain the resultset generated by the command</param>
        /// <param name="tableNames">This array will be used to create table mappings allowing the DataTables to be referenced
        /// by a user defined name (probably the actual table name)
        /// </param>
        /// <param name="commandParameters">An array of SqlParamters used to execute the command</param>
        private static void FillDataset(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, DataSet dataSet, string[] tableNames, params MySqlParameter[] commandParameters)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (dataSet == null) throw new ArgumentNullException("dataSet");

            // Create a command and prepare it for execution
            MySqlCommand command = new MySqlCommand();
            bool mustCloseConnection = false;
            PrepareCommand(command, connection, transaction, commandType, commandText, commandParameters, out mustCloseConnection);

            // Create the DataAdapter & DataSet
            using (MySqlDataAdapter dataAdapter = new MySqlDataAdapter(command))
            {

                // Add the table mappings specified by the user
                if (tableNames != null && tableNames.Length > 0)
                {
                    string tableName = "Table";
                    for (int index = 0; index < tableNames.Length; index++)
                    {
                        if (tableNames[index] == null || tableNames[index].Length == 0) throw new ArgumentException("The tableNames parameter must contain a list of tables, a value was provided as null or empty string.", "tableNames");
                        dataAdapter.TableMappings.Add(tableName, tableNames[index]);
                        tableName += (index + 1).ToString();
                    }
                }

                // Fill the DataSet using default values for DataTable names, etc
                dataAdapter.Fill(dataSet);

                // Detach the MySqlParameters from the command object, so they can be used again
                command.Parameters.Clear();
            }

            if (mustCloseConnection)
                connection.Close();
        }
        #endregion

        #region UpdateDataset
        /// <summary>
        /// Executes the respective command for each inserted, updated, or deleted row in the DataSet.
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  UpdateDataset(conn, insertCommand, deleteCommand, updateCommand, dataSet, "Order");
        /// </remarks>
        /// <param name="insertCommand">A valid transact-SQL statement or stored procedure to insert new records into the data source</param>
        /// <param name="deleteCommand">A valid transact-SQL statement or stored procedure to delete records from the data source</param>
        /// <param name="updateCommand">A valid transact-SQL statement or stored procedure used to update records in the data source</param>
        /// <param name="dataSet">The DataSet used to update the data source</param>
        /// <param name="tableName">The DataTable used to update the data source.</param>
        public static void UpdateDataset(MySqlCommand insertCommand, MySqlCommand deleteCommand, MySqlCommand updateCommand, DataSet dataSet, string tableName)
        {
            if (insertCommand == null) throw new ArgumentNullException("insertCommand");
            if (deleteCommand == null) throw new ArgumentNullException("deleteCommand");
            if (updateCommand == null) throw new ArgumentNullException("updateCommand");
            if (string.IsNullOrEmpty(tableName)) throw new ArgumentNullException("tableName");

            // Create a MySqlDataAdapter, and dispose of it after we are done
            using (MySqlDataAdapter dataAdapter = new MySqlDataAdapter())
            {
                // Set the data adapter commands
                dataAdapter.UpdateCommand = updateCommand;
                dataAdapter.InsertCommand = insertCommand;
                dataAdapter.DeleteCommand = deleteCommand;

                // Update the dataset changes in the data source
                dataAdapter.Update(dataSet, tableName);

                // Commit all the changes made to the DataSet
                dataSet.AcceptChanges();
            }
        }
        #endregion

        #region CreateCommand
        /// <summary>
        /// Simplify the creation of a Sql command object by allowing
        /// a stored procedure and optional parameters to be provided
        /// </summary>
        /// <remarks>
        /// e.g.:  
        ///  MySqlCommand command = CreateCommand(conn, "AddCustomer", "CustomerID", "CustomerName");
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="sourceColumns">An array of string to be assigned as the source columns of the stored procedure parameters</param>
        /// <returns>A valid MySqlCommand object</returns>
        public static MySqlCommand CreateCommand(MySqlConnection connection, string spName, params string[] sourceColumns)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // Create a MySqlCommand
            MySqlCommand cmd = new MySqlCommand(spName, connection) { CommandType = CommandType.StoredProcedure, CommandTimeout = Timeout };

            // If we receive parameter values, we need to figure out where they go
            if ((sourceColumns != null) && (sourceColumns.Length > 0))
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Assign the provided source columns to these parameters based on parameter order
                for (int index = 0; index < sourceColumns.Length; index++)
                    commandParameters[index].SourceColumn = sourceColumns[index];

                // Attach the discovered parameters to the MySqlCommand object
                AttachParameters(cmd, commandParameters);
            }

            return cmd;
        }
        #endregion

        #region ExecuteNonQueryTypedParams
        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the database specified in 
        /// the connection string using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQueryTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified MySqlConnection 
        /// using the dataRow column values as the stored procedure's parameters values.  
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQueryTypedParams(MySqlConnection connection, String spName, DataRow dataRow)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified
        /// MySqlTransaction using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="transaction">A valid MySqlTransaction object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An int representing the number of rows affected by the command</returns>
        public static int ExecuteNonQueryTypedParams(MySqlTransaction transaction, String spName, DataRow dataRow)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // Sf the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
            }
        }
        #endregion

        #region ExecuteDatasetTypedParams
        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDatasetTypedParams(string connectionString, String spName, DataRow dataRow)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            //If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteDataSet(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataSet(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the dataRow column values as the store procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDatasetTypedParams(MySqlConnection connection, String spName, DataRow dataRow)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteDataSet(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataSet(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlTransaction 
        /// using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on row values.
        /// </summary>
        /// <param name="transaction">A valid MySqlTransaction object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A dataset containing the resultset generated by the command</returns>
        public static DataSet ExecuteDatasetTypedParams(MySqlTransaction transaction, String spName, DataRow dataRow)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteDataSet(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteDataSet(transaction, CommandType.StoredProcedure, spName);
            }
        }

        #endregion

        #region ExecuteReaderTypedParams
        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
        /// the connection string using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReaderTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
            }
        }


        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
        /// using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReaderTypedParams(MySqlConnection connection, String spName, DataRow dataRow)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteReader(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlTransaction 
        /// using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="transaction">A valid MySqlTransaction object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>A MySqlDataReader containing the resultset generated by the command</returns>
        public static MySqlDataReader ExecuteReaderTypedParams(MySqlTransaction transaction, String spName, DataRow dataRow)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
            }
        }
        #endregion

        #region ExecuteScalarTypedParams
        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the database specified in 
        /// the connection string using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalarTypedParams(String connectionString, String spName, DataRow dataRow)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection 
        /// using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalarTypedParams(MySqlConnection connection, String spName, DataRow dataRow)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
            }
        }

        /// <summary>
        /// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlTransaction
        /// using the dataRow column values as the stored procedure's parameters values.
        /// This method will query the database to discover the parameters for the 
        /// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
        /// </summary>
        /// <param name="transaction">A valid MySqlTransaction object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="dataRow">The dataRow used to hold the stored procedure's parameter values.</param>
        /// <returns>An object containing the value in the 1x1 resultset generated by the command</returns>
        public static object ExecuteScalarTypedParams(MySqlTransaction transaction, String spName, DataRow dataRow)
        {
            if (transaction == null) throw new ArgumentNullException("transaction");
            if (transaction != null && transaction.Connection == null) throw new ArgumentException("The transaction was rollbacked or commited, please provide an open transaction.", "transaction");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            // If the row has values, the store procedure parameters must be initialized
            if (dataRow != null && dataRow.ItemArray.Length > 0)
            {
                // Pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
                MySqlParameter[] commandParameters = SqlHelperParameterCache.GetSpParameterSet(transaction.Connection, spName);

                // Set the parameters values
                AssignParameterValues(commandParameters, dataRow);

                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
            }
            else
            {
                return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
            }
        }
        #endregion


    }
    public static class SqlHelperParameterCache
    {
        internal static int Timeout = 180;

        #region private methods, variables, and constructors

        //Since this class provides only static methods, make the default constructor private to prevent 
        //instances from being created with "new SqlHelperParameterCache()"

        private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());

        /// <summary>
        /// Resolve at run time the appropriate set of MySqlParameters for a stored procedure
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">Whether or not to include their return value parameter</param>
        /// <returns>The parameter array discovered.</returns>
        private static MySqlParameter[] DiscoverSpParameterSet(MySqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            MySqlCommand cmd = new MySqlCommand(spName, connection) { CommandType = CommandType.StoredProcedure, CommandTimeout = Timeout };

            connection.Open();
            MySqlCommandBuilder.DeriveParameters(cmd);
            connection.Close();

            if (!includeReturnValueParameter)
            {
                cmd.Parameters.RemoveAt(0);
            }

            MySqlParameter[] discoveredParameters = new MySqlParameter[cmd.Parameters.Count];

            cmd.Parameters.CopyTo(discoveredParameters, 0);

            // Init the parameters with a DBNull value
            foreach (MySqlParameter discoveredParameter in discoveredParameters)
            {
                discoveredParameter.Value = DBNull.Value;
            }
            return discoveredParameters;
        }

        /// <summary>
        /// Deep copy of cached MySqlParameter array
        /// </summary>
        /// <param name="originalParameters"></param>
        /// <returns></returns>
        private static MySqlParameter[] CloneParameters(MySqlParameter[] originalParameters)
        {
            MySqlParameter[] clonedParameters = new MySqlParameter[originalParameters.Length];

            for (int i = 0, j = originalParameters.Length; i < j; i++)
            {
                clonedParameters[i] = (MySqlParameter)((ICloneable)originalParameters[i]).Clone();
            }

            return clonedParameters;
        }

        #endregion private methods, variables, and constructors

        #region caching functions

        /// <summary>
        /// Add parameter array to the cache
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <param name="commandParameters">An array of SqlParamters to be cached</param>
        public static void CacheParameterSet(string connectionString, string commandText, params MySqlParameter[] commandParameters)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(commandText)) throw new ArgumentNullException("commandText");

            string hashKey = connectionString + ":" + commandText;

            paramCache[hashKey] = commandParameters;
        }

        /// <summary>
        /// Retrieve a parameter array from the cache
        /// </summary>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="commandText">The stored procedure name or T-SQL command</param>
        /// <returns>An array of SqlParamters</returns>
        public static MySqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(commandText)) throw new ArgumentNullException("commandText");

            string hashKey = connectionString + ":" + commandText;

            MySqlParameter[] cachedParameters = paramCache[hashKey] as MySqlParameter[];
            return cachedParameters == null ? null : CloneParameters(cachedParameters);
        }

        #endregion caching functions

        #region Parameter Discovery Functions

        /// <summary>
        /// Retrieves the set of MySqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <returns>An array of MySqlParameters</returns>
        public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName)
        {
            return GetSpParameterSet(connectionString, spName, false);
        }

        /// <summary>
        /// Retrieves the set of MySqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connectionString">A valid connection string for a MySqlConnection</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of MySqlParameters</returns>
        public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
        {
            if (string.IsNullOrEmpty(connectionString)) throw new ArgumentNullException("connectionString");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            using (MySqlConnection connection = new MySqlConnection(connectionString))
            {
                return GetSpParameterSetInternal(connection, spName, includeReturnValueParameter);
            }
        }

        /// <summary>
        /// Retrieves the set of MySqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <returns>An array of MySqlParameters</returns>
        internal static MySqlParameter[] GetSpParameterSet(MySqlConnection connection, string spName)
        {
            return GetSpParameterSet(connection, spName, false);
        }

        /// <summary>
        /// Retrieves the set of MySqlParameters appropriate for the stored procedure
        /// </summary>
        /// <remarks>
        /// This method will query the database for this information, and then store it in a cache for future requests.
        /// </remarks>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of MySqlParameters</returns>
        internal static MySqlParameter[] GetSpParameterSet(MySqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            using (MySqlConnection clonedConnection = (MySqlConnection)((ICloneable)connection).Clone())
            {
                return GetSpParameterSetInternal(clonedConnection, spName, includeReturnValueParameter);
            }
        }

        /// <summary>
        /// Retrieves the set of MySqlParameters appropriate for the stored procedure
        /// </summary>
        /// <param name="connection">A valid MySqlConnection object</param>
        /// <param name="spName">The name of the stored procedure</param>
        /// <param name="includeReturnValueParameter">A bool value indicating whether the return value parameter should be included in the results</param>
        /// <returns>An array of MySqlParameters</returns>
        private static MySqlParameter[] GetSpParameterSetInternal(MySqlConnection connection, string spName, bool includeReturnValueParameter)
        {
            if (connection == null) throw new ArgumentNullException("connection");
            if (string.IsNullOrEmpty(spName)) throw new ArgumentNullException("spName");

            string hashKey = connection.ConnectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");

            var cachedParameters = paramCache[hashKey] as MySqlParameter[];
            if (cachedParameters == null)
            {
                MySqlParameter[] spParameters = DiscoverSpParameterSet(connection, spName, includeReturnValueParameter);
                paramCache[hashKey] = spParameters;
                cachedParameters = spParameters;
            }

            return CloneParameters(cachedParameters);
        }

        #endregion Parameter Discovery Functions

    }
}

MySQLHelper2.cs

// Copyright � 2004, 2014, Oracle and/or its affiliates. All rights reserved.
//
// MySQL Connector/NET is licensed under the terms of the GPLv2
// <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most 
// MySQL Connectors. There are special exceptions to the terms and 
// conditions of the GPLv2 as it is applied to this software, see the 
// FLOSS License Exception
// <http://www.mysql.com/about/legal/licensing/foss-exception.html>.
//
// This program is free software; you can redistribute it and/or modify 
// it under the terms of the GNU General Public License as published 
// by the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful, but 
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 
// for more details.
//
// You should have received a copy of the GNU General Public License along 
// with this program; if not, write to the Free Software Foundation, Inc., 
// 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA

using System.Data;
using MySql.Data.MySqlClient;
using System.Text;
#if NET_40_OR_GREATER
using System.Threading.Tasks;
using System.Threading;
using System;
#endif

namespace MySql.Data.MySqlClient
{
  /// <summary>
  /// Helper class that makes it easier to work with the provider.
  /// </summary>
  public sealed class MySqlHelper
  {
    enum CharClass : byte
    {
      None,
      Quote,
      Backslash
    }

    private static string stringOfBackslashChars = "\u005c\u00a5\u0160\u20a9\u2216\ufe68\uff3c";
    private static string stringOfQuoteChars =
        "\u0022\u0027\u0060\u00b4\u02b9\u02ba\u02bb\u02bc\u02c8\u02ca\u02cb\u02d9\u0300\u0301\u2018\u2019\u201a\u2032\u2035\u275b\u275c\uff07";

    private static CharClass[] charClassArray = makeCharClassArray();

    // this class provides only static methods
    private MySqlHelper()
    {
    }

    #region ExecuteNonQuery

    /// <summary>
    /// Executes a single command against a MySQL database.  The <see cref="MySqlConnection"/> is assumed to be
    /// open when the method is called and remains open after the method completes.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">SQL command to be executed</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command.</param>
    /// <returns></returns>
    public static int ExecuteNonQuery(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      //create a command and prepare it for execution
      MySqlCommand cmd = new MySqlCommand();
      cmd.Connection = connection;
      cmd.CommandText = commandText;
      cmd.CommandType = CommandType.Text;

      if (commandParameters != null)
        foreach (MySqlParameter p in commandParameters)
          cmd.Parameters.Add(p);

      int result = cmd.ExecuteNonQuery();
      cmd.Parameters.Clear();

      return result;
    }

    /// <summary>
    /// Executes a single command against a MySQL database.  A new <see cref="MySqlConnection"/> is created
    /// using the <see cref="MySqlConnection.ConnectionString"/> given.
    /// </summary>
    /// <param name="connectionString"><see cref="MySqlConnection.ConnectionString"/> to use</param>
    /// <param name="commandText">SQL command to be executed</param>
    /// <param name="parms">Array of <see cref="MySqlParameter"/> objects to use with the command.</param>
    /// <returns></returns>
    public static int ExecuteNonQuery(string connectionString, string commandText, params MySqlParameter[] parms)
    {
      //create & open a SqlConnection, and dispose of it after we are done.
      using (MySqlConnection cn = new MySqlConnection(connectionString))
      {
        cn.Open();

        //call the overload that takes a connection in place of the connection string
        return ExecuteNonQuery(cn, commandText, parms);
      }
    }
    #endregion

#if !WINDOWS_UWP
    #region ExecuteDataSet

    /// <summary>
    /// Executes a single SQL command and returns the first row of the resultset.  A new MySqlConnection object
    /// is created, opened, and closed during this method.
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="parms">Parameters to use for the command</param>
    /// <returns>DataRow containing the first row of the resultset</returns>
    public static DataRow ExecuteDataRow(string connectionString, string commandText, params MySqlParameter[] parms)
    {
      DataSet ds = ExecuteDataset(connectionString, commandText, parms);
      if (ds == null) return null;
      if (ds.Tables.Count == 0) return null;
      if (ds.Tables[0].Rows.Count == 0) return null;
      return ds.Tables[0].Rows[0];
    }

    /// <summary>
    /// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.  
    /// A new MySqlConnection object is created, opened, and closed during this method.
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static DataSet ExecuteDataset(string connectionString, string commandText)
    {
      //pass through the call providing null for the set of SqlParameters
      return ExecuteDataset(connectionString, commandText, (MySqlParameter[])null);
    }

    /// <summary>
    /// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.  
    /// A new MySqlConnection object is created, opened, and closed during this method.
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static DataSet ExecuteDataset(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      //create & open a SqlConnection, and dispose of it after we are done.
      using (MySqlConnection cn = new MySqlConnection(connectionString))
      {
        cn.Open();

        //call the overload that takes a connection in place of the connection string
        return ExecuteDataset(cn, commandText, commandParameters);
      }
    }

    /// <summary>
    /// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.  
    /// The state of the <see cref="MySqlConnection"/> object remains unchanged after execution
    /// of this method.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command to execute</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static DataSet ExecuteDataset(MySqlConnection connection, string commandText)
    {
      //pass through the call providing null for the set of SqlParameters
      return ExecuteDataset(connection, commandText, (MySqlParameter[])null);
    }

    /// <summary>
    /// Executes a single SQL command and returns the resultset in a <see cref="DataSet"/>.  
    /// The state of the <see cref="MySqlConnection"/> object remains unchanged after execution
    /// of this method.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static DataSet ExecuteDataset(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      //create a command and prepare it for execution
      MySqlCommand cmd = new MySqlCommand();
      cmd.Connection = connection;
      cmd.CommandText = commandText;
      cmd.CommandType = CommandType.Text;

      if (commandParameters != null)
        foreach (MySqlParameter p in commandParameters)
          cmd.Parameters.Add(p);

      //create the DataAdapter & DataSet
      MySqlDataAdapter da = new MySqlDataAdapter(cmd);
      DataSet ds = new DataSet();

      //fill the DataSet using default values for DataTable names, etc.
      da.Fill(ds);

      // detach the MySqlParameters from the command object, so they can be used again.			
      cmd.Parameters.Clear();

      //return the dataset
      return ds;
    }

    /// <summary>
    /// Updates the given table with data from the given <see cref="DataSet"/>
    /// </summary>
    /// <param name="connectionString">Settings to use for the update</param>
    /// <param name="commandText">Command text to use for the update</param>
    /// <param name="ds"><see cref="DataSet"/> containing the new data to use in the update</param>
    /// <param name="tablename">Tablename in the dataset to update</param>
    public static void UpdateDataSet(string connectionString, string commandText, DataSet ds, string tablename)
    {
      MySqlConnection cn = new MySqlConnection(connectionString);
      cn.Open();
      MySqlDataAdapter da = new MySqlDataAdapter(commandText, cn);
      MySqlCommandBuilder cb = new MySqlCommandBuilder(da);
      cb.ToString();
      da.Update(ds, tablename);
      cn.Close();
    }

    #endregion
#endif

    #region ExecuteDataReader

    /// <summary>
    /// Executes a single command against a MySQL database, possibly inside an existing transaction.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use for the command</param>
    /// <param name="transaction"><see cref="MySqlTransaction"/> object to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <param name="ExternalConn">True if the connection should be preserved, false if not</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    private static MySqlDataReader ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, string commandText, MySqlParameter[] commandParameters, bool ExternalConn)
    {
      //create a command and prepare it for execution
      MySqlCommand cmd = new MySqlCommand();
      cmd.Connection = connection;
      cmd.Transaction = transaction;
      cmd.CommandText = commandText;
      cmd.CommandType = CommandType.Text;

      if (commandParameters != null)
        foreach (MySqlParameter p in commandParameters)
          cmd.Parameters.Add(p);

      //create a reader
      MySqlDataReader dr;

      // call ExecuteReader with the appropriate CommandBehavior
      if (ExternalConn)
      {
        dr = cmd.ExecuteReader();
      }
      else
      {
        dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
      }

      // detach the SqlParameters from the command object, so they can be used again.
      cmd.Parameters.Clear();

      return dr;
    }

    /// <summary>
    /// Executes a single command against a MySQL database.
    /// </summary>
    /// <param name="connectionString">Settings to use for this command</param>
    /// <param name="commandText">Command text to use</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static MySqlDataReader ExecuteReader(string connectionString, string commandText)
    {
      //pass through the call providing null for the set of SqlParameters
      return ExecuteReader(connectionString, commandText, (MySqlParameter[])null);
    }

    /// <summary>
    /// Executes a single command against a MySQL database.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static MySqlDataReader ExecuteReader(MySqlConnection connection, string commandText)
    {
      //pass through the call providing null for the set of SqlParameters
      return ExecuteReader(connection, null, commandText, (MySqlParameter[])null, true);
    }

    /// <summary>
    /// Executes a single command against a MySQL database.
    /// </summary>
    /// <param name="connectionString">Settings to use for this command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static MySqlDataReader ExecuteReader(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      //create & open a SqlConnection
      MySqlConnection cn = new MySqlConnection(connectionString);
      cn.Open();

      //call the private overload that takes an internally owned connection in place of the connection string
      return ExecuteReader(cn, null, commandText, commandParameters, false);
    }

    /// <summary>
    /// Executes a single command against a MySQL database.
    /// </summary>
    /// <param name="connection">Connection to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static MySqlDataReader ExecuteReader(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      //call the private overload that takes an internally owned connection in place of the connection string
      return ExecuteReader(connection, null, commandText, commandParameters, true);
    }


    #endregion

    #region ExecuteScalar

    /// <summary>
    /// Execute a single command against a MySQL database.
    /// </summary>
    /// <param name="connectionString">Settings to use for the update</param>
    /// <param name="commandText">Command text to use for the update</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static object ExecuteScalar(string connectionString, string commandText)
    {
      //pass through the call providing null for the set of MySqlParameters
      return ExecuteScalar(connectionString, commandText, (MySqlParameter[])null);
    }

    /// <summary>
    /// Execute a single command against a MySQL database.
    /// </summary>
    /// <param name="connectionString">Settings to use for the command</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static object ExecuteScalar(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      //create & open a SqlConnection, and dispose of it after we are done.
      using (MySqlConnection cn = new MySqlConnection(connectionString))
      {
        cn.Open();

        //call the overload that takes a connection in place of the connection string
        return ExecuteScalar(cn, commandText, commandParameters);
      }
    }

    /// <summary>
    /// Execute a single command against a MySQL database.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static object ExecuteScalar(MySqlConnection connection, string commandText)
    {
      //pass through the call providing null for the set of MySqlParameters
      return ExecuteScalar(connection, commandText, (MySqlParameter[])null);
    }

    /// <summary>
    /// Execute a single command against a MySQL database.
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static object ExecuteScalar(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      //create a command and prepare it for execution
      MySqlCommand cmd = new MySqlCommand();
      cmd.Connection = connection;
      cmd.CommandText = commandText;
      cmd.CommandType = CommandType.Text;

      if (commandParameters != null)
        foreach (MySqlParameter p in commandParameters)
          cmd.Parameters.Add(p);

      //execute the command & return the results
      object retval = cmd.ExecuteScalar();

      // detach the SqlParameters from the command object, so they can be used again.
      cmd.Parameters.Clear();
      return retval;

    }

    #endregion

    #region Utility methods
    private static CharClass[] makeCharClassArray()
    {

      CharClass[] a = new CharClass[65536];
      foreach (char c in stringOfBackslashChars)
      {
        a[c] = CharClass.Backslash;
      }
      foreach (char c in stringOfQuoteChars)
      {
        a[c] = CharClass.Quote;
      }
      return a;
    }

    private static bool needsQuoting(string s)
    {
      foreach (char c in s)
      {
        if (charClassArray[c] != CharClass.None)
        {
          return true;
        }
      }
      return false;
    }

    /// <summary>
    /// Escapes the string.
    /// </summary>
    /// <param name="value">The string to escape</param>
    /// <returns>The string with all quotes escaped.</returns>
    public static string EscapeString(string value)
    {
      if (!needsQuoting(value))
        return value;

      StringBuilder sb = new StringBuilder();

      foreach (char c in value)
      {
        CharClass charClass = charClassArray[c];
        if (charClass != CharClass.None)
        {
          sb.Append("\\");
        }
        sb.Append(c);
      }
      return sb.ToString();
    }

    public static string DoubleQuoteString(string value)
    {
      if (!needsQuoting(value))
        return value;

      StringBuilder sb = new StringBuilder();
      foreach (char c in value)
      {
        CharClass charClass = charClassArray[c];
        if (charClass == CharClass.Quote)
          sb.Append(c);
        else if (charClass == CharClass.Backslash)
          sb.Append("\\");
        sb.Append(c);
      }
      return sb.ToString();
    }

    #endregion

#if NET_40_OR_GREATER
    #region Async

    #region DataRow
    /// <summary>
    /// Async version of ExecuteDataRow
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="parms">Parameters to use for the command</param>
    /// <returns>DataRow containing the first row of the resultset</returns>
    public static Task<DataRow> ExecuteDataRowAsync(string connectionString, string commandText, params MySqlParameter[] parms)
    {
      return ExecuteDataRowAsync(connectionString, commandText, CancellationToken.None, parms);
    }

    public static Task<DataRow> ExecuteDataRowAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] parms)
    {
      var result = new TaskCompletionSource<DataRow>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var row = ExecuteDataRow(connectionString, commandText, parms);
          result.SetResult(row);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    #endregion

    #region NonQuery
    /// <summary>
    /// Async version of ExecuteNonQuery
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">SQL command to be executed</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command.</param>
    /// <returns>Rows affected</returns>
    public static Task<int> ExecuteNonQueryAsync(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteNonQueryAsync(connection, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<int> ExecuteNonQueryAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<int>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var queryResult = ExecuteNonQuery(connection, commandText, commandParameters);
          result.SetResult(queryResult);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of ExecuteNonQuery
    /// </summary>
    /// <param name="connectionString"><see cref="MySqlConnection.ConnectionString"/> to use</param>
    /// <param name="commandText">SQL command to be executed</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command.</param>
    /// <returns>Rows affected</returns>
    public static Task<int> ExecuteNonQueryAsync(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteNonQueryAsync(connectionString, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<int> ExecuteNonQueryAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<int>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var queryResult = ExecuteNonQuery(connectionString, commandText, commandParameters);
          result.SetResult(queryResult);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    #endregion

    #region DataSet
    /// <summary>
    /// Async version of ExecuteDataset
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText)
    {
      return ExecuteDatasetAsync(connectionString, commandText, CancellationToken.None, (MySqlParameter[])null);
    }

    public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteDatasetAsync(connectionString, commandText, cancellationToken, (MySqlParameter[])null);
    }

    /// <summary>
    /// Async version of ExecuteDataset
    /// </summary>
    /// <param name="connectionString">Settings to be used for the connection</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteDatasetAsync(connectionString, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<DataSet> ExecuteDatasetAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<DataSet>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var dataset = ExecuteDataset(connectionString, commandText, commandParameters);
          result.SetResult(dataset);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of ExecuteDataset
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command to execute</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText)
    {
      return ExecuteDatasetAsync(connection, commandText, CancellationToken.None, (MySqlParameter[])null);
    }

    public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteDatasetAsync(connection, commandText, cancellationToken, (MySqlParameter[])null);
    }

    /// <summary>
    /// Async version of ExecuteDataset
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command to execute</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns><see cref="DataSet"/> containing the resultset</returns>
    public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteDatasetAsync(connection, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<DataSet> ExecuteDatasetAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<DataSet>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var dataset = ExecuteDataset(connection, commandText, commandParameters);
          result.SetResult(dataset);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of UpdateDataset
    /// </summary>
    /// <param name="connectionString">Settings to use for the update</param>
    /// <param name="commandText">Command text to use for the update</param>
    /// <param name="ds"><see cref="DataSet"/> containing the new data to use in the update</param>
    /// <param name="tablename">Tablename in the dataset to update</param>
    public static Task UpdateDataSetAsync(string connectionString, string commandText, DataSet ds, string tablename)
    {
      return UpdateDataSetAsync(connectionString, commandText, ds, tablename, CancellationToken.None);
    }

    public static Task UpdateDataSetAsync(string connectionString, string commandText, DataSet ds, string tablename, CancellationToken cancellationToken)
    {
      var result = new TaskCompletionSource<bool>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          UpdateDataSet(connectionString, commandText, ds, tablename);
          result.SetResult(true);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    #endregion

    #region DataReader
    /// <summary>
    /// Async version of ExecuteReader
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use for the command</param>
    /// <param name="transaction"><see cref="MySqlTransaction"/> object to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <param name="ExternalConn">True if the connection should be preserved, false if not</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    private static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, MySqlTransaction transaction, string commandText, MySqlParameter[] commandParameters, bool ExternalConn)
    {
      return ExecuteReaderAsync(connection, transaction, commandText, commandParameters, ExternalConn, CancellationToken.None);
    }

    private static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, MySqlTransaction transaction, string commandText, MySqlParameter[] commandParameters, bool ExternalConn, CancellationToken cancellationToken)
    {
      var result = new TaskCompletionSource<MySqlDataReader>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var reader = ExecuteReader(connection, transaction, commandText, commandParameters, ExternalConn);
          result.SetResult(reader);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of ExecuteReader
    /// </summary>
    /// <param name="connectionString">Settings to use for this command</param>
    /// <param name="commandText">Command text to use</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static Task<MySqlDataReader> ExecuteReaderAsync(string connectionString, string commandText)
    {
      return ExecuteReaderAsync(connectionString, commandText, CancellationToken.None, (MySqlParameter[])null);
    }

    public static Task<MySqlDataReader> ExecuteReaderAsync(string connectionString, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteReaderAsync(connectionString, commandText, cancellationToken, (MySqlParameter[])null);
    }

    /// <summary>
    /// Async version of ExecuteReader
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, string commandText)
    {
      return ExecuteReaderAsync(connection, null, commandText, (MySqlParameter[])null, true, CancellationToken.None);
    }

    public static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteReaderAsync(connection, null, commandText, (MySqlParameter[])null, true, cancellationToken);
    }

    /// <summary>
    /// Async version of ExecuteReader
    /// </summary>
    /// <param name="connectionString">Settings to use for this command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static Task<MySqlDataReader> ExecuteReaderAsync(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteReaderAsync(connectionString, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<MySqlDataReader> ExecuteReaderAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<MySqlDataReader>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var reader = ExecuteReader(connectionString, commandText, commandParameters);
          result.SetResult(reader);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of ExecuteReader
    /// </summary>
    /// <param name="connection">Connection to use for the command</param>
    /// <param name="commandText">Command text to use</param>
    /// <param name="commandParameters">Array of <see cref="MySqlParameter"/> objects to use with the command</param>
    /// <returns><see cref="MySqlDataReader"/> object ready to read the results of the command</returns>
    public static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteReaderAsync(connection, null, commandText, commandParameters, true, CancellationToken.None);
    }

    public static Task<MySqlDataReader> ExecuteReaderAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      return ExecuteReaderAsync(connection, null, commandText, commandParameters, true, cancellationToken);
    }

    #endregion

    #region Scalar
    /// <summary>
    /// Async version of ExecuteScalar
    /// </summary>
    /// <param name="connectionString">Settings to use for the update</param>
    /// <param name="commandText">Command text to use for the update</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static Task<object> ExecuteScalarAsync(string connectionString, string commandText)
    {
      return ExecuteScalarAsync(connectionString, commandText, CancellationToken.None, (MySqlParameter[])null);
    }

    public static Task<object> ExecuteScalarAsync(string connectionString, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteScalarAsync(connectionString, commandText, cancellationToken, (MySqlParameter[])null);
    }

    /// <summary>
    /// Async version of ExecuteScalar
    /// </summary>
    /// <param name="connectionString">Settings to use for the command</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static Task<object> ExecuteScalarAsync(string connectionString, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteScalarAsync(connectionString, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<object> ExecuteScalarAsync(string connectionString, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<object>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var scalarResult = ExecuteScalar(connectionString, commandText, commandParameters);
          result.SetResult(scalarResult);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }

    /// <summary>
    /// Async version of ExecuteScalar
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static Task<object> ExecuteScalarAsync(MySqlConnection connection, string commandText)
    {
      return ExecuteScalarAsync(connection, commandText, CancellationToken.None, (MySqlParameter[])null);
    }

    public static Task<object> ExecuteScalarAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken)
    {
      return ExecuteScalarAsync(connection, commandText, cancellationToken, (MySqlParameter[])null);
    }

    /// <summary>
    /// Async version of ExecuteScalar
    /// </summary>
    /// <param name="connection"><see cref="MySqlConnection"/> object to use</param>
    /// <param name="commandText">Command text to use for the command</param>
    /// <param name="commandParameters">Parameters to use for the command</param>
    /// <returns>The first column of the first row in the result set, or a null reference if the result set is empty.</returns>
    public static Task<object> ExecuteScalarAsync(MySqlConnection connection, string commandText, params MySqlParameter[] commandParameters)
    {
      return ExecuteScalarAsync(connection, commandText, CancellationToken.None, commandParameters);
    }

    public static Task<object> ExecuteScalarAsync(MySqlConnection connection, string commandText, CancellationToken cancellationToken, params MySqlParameter[] commandParameters)
    {
      var result = new TaskCompletionSource<object>();
      if (cancellationToken == CancellationToken.None || !cancellationToken.IsCancellationRequested)
      {
        try
        {
          var scalarResult = ExecuteScalar(connection, commandText, commandParameters);
          result.SetResult(scalarResult);
        }
        catch (Exception ex)
        {
          result.SetException(ex);
        }
      }
      else
      {
        result.SetCanceled();
      }
      return result.Task;
    }
    #endregion
    #endregion
#endif
  }
}

MySqlHelper3.cs

//===============================================================================
// Leo Muller 2015
// 
// MySqlHelper.cs based on MySqlHelper.cs
// Adapted for use with MySql.
//
// .net MySql connector:
// http://dev.MySql.com/downloads/connector/net/
//
//==============================================================================

using System;
using System.Data;
using System.Xml;
using MySql.Data.MySqlClient;
using System.Collections;

namespace must
{
	/// <summary>
	/// The MySqlHelper class is intended to encapsulate high performance, scalable best practices for 
	/// common uses of MySqlClient.
	/// </summary>
	public sealed class MySqlHelper
	{
		#region private utility methods & constructors

		//Since this class provides only static methods, make the default constructor private to prevent 
		//instances from being created with "new MySqlHelper()".
		private MySqlHelper() { }



		/// <summary>
		/// This method is used to attach array of MySqlParameters to a MySqlCommand.
		/// 
		/// This method will assign a value of DbNull to any parameter with a direction of
		/// InputOutput and a value of null.  
		/// 
		/// This behavior will prevent default values from being used, but
		/// this will be the less common case than an intended pure output parameter (derived as InputOutput)
		/// where the user provided no input value.
		/// </summary>
		/// <param name="command">The command to which the parameters will be added</param>
		/// <param name="commandParameters">an array of MySqlParameters tho be added to command</param>
		private static void AttachParameters(MySqlCommand command, MySqlParameter[] commandParameters)
		{
			foreach (MySqlParameter p in commandParameters)
			{
				//check for derived output value with no value assigned
				if ((p.Direction == ParameterDirection.InputOutput) && (p.Value == null))
				{
					p.Value = DBNull.Value;
				}

				command.Parameters.Add(p);
			}
		}

		/// <summary>
		/// This method assigns an array of values to an array of MySqlParameters.
		/// </summary>
		/// <param name="commandParameters">array of MySqlParameters to be assigned values</param>
		/// <param name="parameterValues">array of objects holding the values to be assigned</param>
		private static void AssignParameterValues(MySqlParameter[] commandParameters, object[] parameterValues)
		{
			if ((commandParameters == null) || (parameterValues == null))
			{
				//do nothing if we get no data
				return;
			}

			// we must have the same number of values as we pave parameters to put them in
			if (commandParameters.Length != parameterValues.Length)
			{
				throw new ArgumentException("Parameter count does not match Parameter Value count.");
			}

			//iterate through the MySqlParameters, assigning the values from the corresponding position in the 
			//value array
			for (int i = 0, j = commandParameters.Length; i < j; i++)
			{
				commandParameters[i].Value = parameterValues[i];
			}
		}

		/// <summary>
		/// This method opens (if necessary) and assigns a connection, transaction, command type and parameters 
		/// to the provided command.
		/// </summary>
		/// <param name="command">the MySqlCommand to be prepared</param>
		/// <param name="connection">a valid MySqlConnection, on which to execute this command</param>
		/// <param name="transaction">a valid MySqlTransaction, or 'null'</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
		private static void PrepareCommand(MySqlCommand command, MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters)
		{
			//if the provided connection is not open, we will open it
			if (connection.State != ConnectionState.Open)
			{
				connection.Open();
			}

			//associate the connection with the command
			command.Connection = connection;

			//set the command text (stored procedure name or MySql statement)
			command.CommandText = commandText;

			//if we were provided a transaction, assign it.
			if (transaction != null)
			{
				command.Transaction = transaction;
			}

			//set the command type
			command.CommandType = commandType;

			//attach the command parameters if they are provided
			if (commandParameters != null)
			{
				AttachParameters(command, commandParameters);
			}

			return;
		}


		#endregion private utility methods & constructors

		#region ExecuteNonQuery

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the database specified in 
		/// the connection string. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders");
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteNonQuery(connectionString, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset) against the database specified in the connection string 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(connString, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//create & open a MySqlConnection, and dispose of it after we are done.
			using (MySqlConnection cn = new MySqlConnection(connectionString))
			{
				cn.Open();

				//call the overload that takes a connection in place of the connection string
				return ExecuteNonQuery(cn, commandType, commandText, commandParameters);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the database specified in 
		/// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int result = ExecuteNonQuery(connString, "PublishOrders", 24, 36);
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored prcedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(string connectionString, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteNonQuery(connectionString, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the provided MySqlConnection. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders");
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteNonQuery(connection, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset) against the specified MySqlConnection 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(conn, CommandType.StoredProcedure, "PublishOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters);

				//finally, execute the command.
				int retval = cmd.ExecuteNonQuery();

				// detach the MySqlParameters from the command object, so they can be used again.
				cmd.Parameters.Clear();
				return retval;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified MySqlConnection 
		/// using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int result = ExecuteNonQuery(conn, "PublishOrders", 24, 36);
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlConnection connection, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteNonQuery(connection, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset and takes no parameters) against the provided MySqlTransaction. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "PublishOrders");
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteNonQuery(transaction, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns no resultset) against the specified MySqlTransaction
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int result = ExecuteNonQuery(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = transaction.Connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);

				//finally, execute the command.
				int retval = cmd.ExecuteNonQuery();

				// detach the MySqlParameters from the command object, so they can be used again.
				cmd.Parameters.Clear();
				return retval;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns no resultset) against the specified 
		/// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int result = ExecuteNonQuery(conn, trans, "PublishOrders", 24, 36);
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an int representing the number of rows affected by the command</returns>
		public static int ExecuteNonQuery(MySqlTransaction transaction, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteNonQuery(transaction, CommandType.StoredProcedure, spName);
			}
		}


		#endregion ExecuteNonQuery

		#region ExecuteDataTable
		public static DataTable GetData(string connectionString, string StoredProcedure)
		{
			DataSet ds = ExecuteDataset(connectionString, CommandType.StoredProcedure, StoredProcedure);

			return ds.Tables[0];
		}

		public static DataTable GetData(string connectionString, string StoredProcedure, params MySqlParameter[] commandParameters)
		{
			DataSet ds = ExecuteDataset(connectionString, CommandType.StoredProcedure, StoredProcedure, commandParameters);

			return ds.Tables[0];
		}

		#endregion ExecuteDataTable

		#region ExecuteDataSet

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
		/// the connection string. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteDataset(connectionString, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//create & open a MySqlConnection, and dispose of it after we are done.
			using (MySqlConnection cn = new MySqlConnection(connectionString))
			{
				cn.Open();

				//call the overload that takes a connection in place of the connection string
				return ExecuteDataset(cn, commandType, commandText, commandParameters);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
		/// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(connString, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(string connectionString, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteDataset(connectionString, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlConnection connection, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteDataset(connection, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters);

				//create the DataAdapter & DataSet
				MySqlDataAdapter da = new MySqlDataAdapter(cmd);
				DataSet ds = new DataSet();

				//fill the DataSet using default values for DataTable names, etc.
				da.Fill(ds);

				// detach the MySqlParameters from the command object, so they can be used again.			
				cmd.Parameters.Clear();

				//return the dataset
				return ds;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
		/// using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(conn, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlConnection connection, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteDataset(connection, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteDataset(connection, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlTransaction transaction, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteDataset(transaction, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = transaction.Connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);

				//create the DataAdapter & DataSet
				MySqlDataAdapter da = new MySqlDataAdapter(cmd);
				DataSet ds = new DataSet();

				//fill the DataSet using default values for DataTable names, etc.
				da.Fill(ds);

				// detach the MySqlParameters from the command object, so they can be used again.
				cmd.Parameters.Clear();

				//return the dataset
				return ds;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified 
		/// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  DataSet ds = ExecuteDataset(trans, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a dataset containing the resultset generated by the command</returns>
		public static DataSet ExecuteDataset(MySqlTransaction transaction, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteDataset(transaction, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteDataset(transaction, CommandType.StoredProcedure, spName);
			}
		}

		#endregion ExecuteDataSet

		#region ExecuteReader

		/// <summary>
		/// this enum is used to indicate whether the connection was provided by the caller, or created by MySqlHelper, so that
		/// we can set the appropriate CommandBehavior when calling ExecuteReader()
		/// </summary>
		private enum MySqlConnectionOwnership
		{
			/// <summary>Connection is owned and managed by MySqlHelper</summary>
			Internal,
			/// <summary>Connection is owned and managed by the caller</summary>
			External
		}

		/// <summary>
		/// Create and prepare a MySqlCommand, and call ExecuteReader with the appropriate CommandBehavior.
		/// </summary>
		/// <remarks>
		/// If we created and opened the connection, we want the connection to be closed when the DataReader is closed.
		/// 
		/// If the caller provided the connection, we want to leave it to them to manage.
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection, on which to execute this command</param>
		/// <param name="transaction">a valid MySqlTransaction, or 'null'</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParameters to be associated with the command or 'null' if no parameters are required</param>
		/// <param name="connectionOwnership">indicates whether the connection parameter was provided by the caller, or created by MySqlHelper</param>
		/// <returns>MySqlDataReader containing the results of the command</returns>
		private static MySqlDataReader ExecuteReader(MySqlConnection connection, MySqlTransaction transaction, CommandType commandType, string commandText, MySqlParameter[] commandParameters, MySqlConnectionOwnership connectionOwnership)
		{
			//create a command and prepare it for execution
			MySqlCommand cmd = new MySqlCommand();
			cmd.CommandTimeout = connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
			PrepareCommand(cmd, connection, transaction, commandType, commandText, commandParameters);

			//create a reader
			MySqlDataReader dr;

			// call ExecuteReader with the appropriate CommandBehavior
			if (connectionOwnership == MySqlConnectionOwnership.External)
			{
				dr = cmd.ExecuteReader();
			}
			else
			{
				dr = cmd.ExecuteReader(CommandBehavior.CloseConnection);
			}

			// detach the MySqlParameters from the command object, so they can be used again.
			cmd.Parameters.Clear();

			return dr;
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the database specified in 
		/// the connection string. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteReader(connectionString, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the database specified in the connection string 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(connString, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//create & open a MySqlConnection
			MySqlConnection cn = new MySqlConnection(connectionString);
			cn.Open();

			try
			{
				//call the private overload that takes an internally owned connection in place of the connection string
				return ExecuteReader(cn, null, commandType, commandText, commandParameters, MySqlConnectionOwnership.Internal);
			}
			catch
			{
				//if we fail to return the MySqlDatReader, we need to close the connection ourselves
				cn.Close();
				throw;
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the database specified in 
		/// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(connString, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(string connectionString, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteReader(connectionString, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteReader(connectionString, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlConnection. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteReader(connection, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(conn, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//pass through the call to the private overload using a null transaction value and an externally owned connection
			return ExecuteReader(connection, (MySqlTransaction)null, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified MySqlConnection 
		/// using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(conn, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlConnection connection, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName);

				AssignParameterValues(commandParameters, parameterValues);

				return ExecuteReader(connection, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteReader(connection, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset and takes no parameters) against the provided MySqlTransaction. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders");
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteReader(transaction, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a resultset) against the specified MySqlTransaction
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///   MySqlDataReader dr = ExecuteReader(trans, CommandType.StoredProcedure, "GetOrders", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//pass through to private overload, indicating that the connection is owned by the caller
			return ExecuteReader(transaction.Connection, transaction, commandType, commandText, commandParameters, MySqlConnectionOwnership.External);
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a resultset) against the specified
		/// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  MySqlDataReader dr = ExecuteReader(trans, "GetOrders", 24, 36);
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>a MySqlDataReader containing the resultset generated by the command</returns>
		public static MySqlDataReader ExecuteReader(MySqlTransaction transaction, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName);

				AssignParameterValues(commandParameters, parameterValues);

				return ExecuteReader(transaction, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteReader(transaction, CommandType.StoredProcedure, spName);
			}
		}

		#endregion ExecuteReader

		#region ExecuteScalar

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the database specified in 
		/// the connection string. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount");
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters			
			return ExecuteScalar(connectionString, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset) against the database specified in the connection string 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(connString, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(string connectionString, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			//create & open a MySqlConnection, and dispose of it after we are done.
			using (MySqlConnection cn = new MySqlConnection(connectionString))
			{
				cn.Open();

				//call the overload that takes a connection in place of the connection string
				return ExecuteScalar(cn, commandType, commandText, commandParameters);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the database specified in 
		/// the connection string using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(connString, "GetOrderCount", 24, 36);
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(string connectionString, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteScalar(connectionString, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlConnection. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount");
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteScalar(connection, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection 
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(conn, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlConnection connection, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, connection, (MySqlTransaction)null, commandType, commandText, commandParameters);

				//execute the command & return the results
				object retval = cmd.ExecuteScalar();

				// detach the MySqlParameters from the command object, so they can be used again.
				cmd.Parameters.Clear();
				return retval;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}



		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlConnection 
		/// using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(conn, "GetOrderCount", 24, 36);
		/// </remarks>
		/// <param name="connection">a valid MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlConnection connection, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteScalar(connection, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteScalar(connection, CommandType.StoredProcedure, spName);
			}
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset and takes no parameters) against the provided MySqlTransaction. 
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount");
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText)
		{
			//pass through the call providing null for the set of MySqlParameters
			return ExecuteScalar(transaction, commandType, commandText, (MySqlParameter[])null);
		}

		/// <summary>
		/// Execute a MySqlCommand (that returns a 1x1 resultset) against the specified MySqlTransaction
		/// using the provided parameters.
		/// </summary>
		/// <remarks>
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(trans, CommandType.StoredProcedure, "GetOrderCount", new MySqlParameter("@prodid", 24));
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="commandType">the CommandType (stored procedure, text, etc.)</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters used to execute the command</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlTransaction transaction, CommandType commandType, string commandText, params MySqlParameter[] commandParameters)
		{
			try
			{
				//create a command and prepare it for execution
				MySqlCommand cmd = new MySqlCommand();
				cmd.CommandTimeout = transaction.Connection.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				PrepareCommand(cmd, transaction.Connection, transaction, commandType, commandText, commandParameters);

				//execute the command & return the results
				object retval = cmd.ExecuteScalar();

				// detach the MySqlParameters from the command object, so they can be used again.
				cmd.Parameters.Clear();
				return retval;
			}
			catch (Exception ex)
			{
				throw new Exception(ex.Message + Environment.NewLine + "Query: " + commandText);
			}
		}

		/// <summary>
		/// Execute a stored procedure via a MySqlCommand (that returns a 1x1 resultset) against the specified
		/// MySqlTransaction using the provided parameter values.  This method will query the database to discover the parameters for the 
		/// stored procedure (the first time each stored procedure is called), and assign the values based on parameter order.
		/// </summary>
		/// <remarks>
		/// This method provides no access to output parameters or the stored procedure's return value parameter.
		/// 
		/// e.g.:  
		///  int orderCount = (int)ExecuteScalar(trans, "GetOrderCount", 24, 36);
		/// </remarks>
		/// <param name="transaction">a valid MySqlTransaction</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="parameterValues">an array of objects to be assigned as the input values of the stored procedure</param>
		/// <returns>an object containing the value in the 1x1 resultset generated by the command</returns>
		public static object ExecuteScalar(MySqlTransaction transaction, string spName, params object[] parameterValues)
		{
			//if we receive parameter values, we need to figure out where they go
			if ((parameterValues != null) && (parameterValues.Length > 0))
			{
				//pull the parameters for this stored procedure from the parameter cache (or discover them & populate the cache)
				MySqlParameter[] commandParameters = MySqlHelperParameterCache.GetSpParameterSet(transaction.Connection.ConnectionString, spName);

				//assign the provided values to these parameters based on parameter order
				AssignParameterValues(commandParameters, parameterValues);

				//call the overload that takes an array of MySqlParameters
				return ExecuteScalar(transaction, CommandType.StoredProcedure, spName, commandParameters);
			}
			//otherwise we can just call the SP without params
			else
			{
				return ExecuteScalar(transaction, CommandType.StoredProcedure, spName);
			}
		}

		#endregion ExecuteScalar
		
	}

	/// <summary>
	/// MySqlHelperParameterCache provides functions to leverage a static cache of procedure parameters, and the
	/// ability to discover parameters for stored procedures at run-time.
	/// </summary>
	public sealed class MySqlHelperParameterCache
	{
		#region private methods, variables, and constructors

		//Since this class provides only static methods, make the default constructor private to prevent 
		//instances from being created with "new MySqlHelperParameterCache()".
		private MySqlHelperParameterCache() { }

		private static Hashtable paramCache = Hashtable.Synchronized(new Hashtable());

		/// <summary>
		/// resolve at run time the appropriate set of MySqlParameters for a stored procedure
		/// </summary>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="includeReturnValueParameter">whether or not to include their return value parameter</param>
		/// <returns></returns>
		private static MySqlParameter[] DiscoverSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
		{
			using (MySqlConnection cn = new MySqlConnection(connectionString))
			using (MySqlCommand cmd = new MySqlCommand(spName, cn))
			{
				cn.Open();
				cmd.CommandTimeout = cn.ConnectionTimeout;	//leo - so setting the connecting timeout is all that we need.
				cmd.CommandType = CommandType.StoredProcedure;

				MySqlCommandBuilder.DeriveParameters(cmd);

				if (!includeReturnValueParameter)
				{
					cmd.Parameters.RemoveAt(0);
				}

				MySqlParameter[] discoveredParameters = new MySqlParameter[cmd.Parameters.Count]; ;

				cmd.Parameters.CopyTo(discoveredParameters, 0);

				return discoveredParameters;
			}
		}

		//deep copy of cached MySqlParameter array
		private static MySqlParameter[] CloneParameters(MySqlParameter[] originalParameters)
		{
			MySqlParameter[] clonedParameters = new MySqlParameter[originalParameters.Length];

			for (int i = 0, j = originalParameters.Length; i < j; i++)
			{
				clonedParameters[i] = (MySqlParameter)((ICloneable)originalParameters[i]).Clone();
			}

			return clonedParameters;
		}

		#endregion private methods, variables, and constructors

		#region caching functions

		/// <summary>
		/// add parameter array to the cache
		/// </summary>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <param name="commandParameters">an array of MySqlParamters to be cached</param>
		public static void CacheParameterSet(string connectionString, string commandText, params MySqlParameter[] commandParameters)
		{
			string hashKey = connectionString + ":" + commandText;

			paramCache[hashKey] = commandParameters;
		}

		/// <summary>
		/// retrieve a parameter array from the cache
		/// </summary>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="commandText">the stored procedure name or T-MySql command</param>
		/// <returns>an array of MySqlParamters</returns>
		public static MySqlParameter[] GetCachedParameterSet(string connectionString, string commandText)
		{
			string hashKey = connectionString + ":" + commandText;

			MySqlParameter[] cachedParameters = (MySqlParameter[])paramCache[hashKey];

			if (cachedParameters == null)
			{
				return null;
			}
			else
			{
				return CloneParameters(cachedParameters);
			}
		}

		#endregion caching functions

		#region Parameter Discovery Functions

		/// <summary>
		/// Retrieves the set of MySqlParameters appropriate for the stored procedure
		/// </summary>
		/// <remarks>
		/// This method will query the database for this information, and then store it in a cache for future requests.
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <returns>an array of MySqlParameters</returns>
		public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName)
		{
			return GetSpParameterSet(connectionString, spName, false);
		}

		/// <summary>
		/// Retrieves the set of MySqlParameters appropriate for the stored procedure
		/// </summary>
		/// <remarks>
		/// This method will query the database for this information, and then store it in a cache for future requests.
		/// </remarks>
		/// <param name="connectionString">a valid connection string for a MySqlConnection</param>
		/// <param name="spName">the name of the stored procedure</param>
		/// <param name="includeReturnValueParameter">a bool value indicating whether the return value parameter should be included in the results</param>
		/// <returns>an array of MySqlParameters</returns>
		public static MySqlParameter[] GetSpParameterSet(string connectionString, string spName, bool includeReturnValueParameter)
		{
			string hashKey = connectionString + ":" + spName + (includeReturnValueParameter ? ":include ReturnValue Parameter" : "");

			MySqlParameter[] cachedParameters;

			cachedParameters = (MySqlParameter[])paramCache[hashKey];

			if (cachedParameters == null)
			{
				cachedParameters = (MySqlParameter[])(paramCache[hashKey] = DiscoverSpParameterSet(connectionString, spName, includeReturnValueParameter));
			}

			return CloneParameters(cachedParameters);
		}

		#endregion Parameter Discovery Functions

	}
}