Command Line Args

CommandLineArgs.cs

using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace CommandLineUtils
{
    /// <summary>
    /// Arguments class.
    /// </summary>
    /// <seealso cref="http://www.codeproject.com/Articles/3111/C-NET-Command-Line-Arguments-Parser"/>
    public class Arguments
    {
        private static readonly Regex Splitter = new Regex(@"^-{1,2}|^/|=|:", RegexOptions.IgnoreCase | RegexOptions.Compiled);
        private static readonly Regex Remover = new Regex(@"^['""]?(.*?)['""]?$", RegexOptions.IgnoreCase | RegexOptions.Compiled);

        /// <summary>
        /// Gets the parameters.
        /// </summary>
        public Dictionary<string, string> Parameters { get; private set; }

        /// <summary>
        /// Gets the <see cref="System.String"/> with the specified param.
        /// </summary>
        /// <value></value>
        public string this[string param]
        {
            get { return Parameters[param]; }
        }

        /// <summary>
        /// Initializes a new instance of the <see cref="Arguments"/> class.
        /// </summary>
        /// <param name="args">The args.</param>
        public Arguments(IEnumerable<string> args)
        {
            Parameters = new Dictionary<string, string>();
            if (args == null) return;

            string parameter = null;
            foreach (var parts in args.Select(txt => Splitter.Split(txt, 3)))
            {
                switch (parts.Length)
                {
                    case 1: // Value without parameter
                        AddToParams(parameter, Remover.Replace(parts[0], "$1"));
                        parameter = null;
                        break;
                    case 2: // Parameter without value
                        AddToParams(parameter);
                        parameter = parts[1];
                        break;
                    case 3: // Parameter with value
                        AddToParams(parameter);
                        AddToParams(parts[1], Remover.Replace(parts[2], "$1"));
                        parameter = null;
                        break;
                }
            }

            AddToParams(parameter); // insert last item.
        }

        private void AddToParams(string parameter, string value = "true")
        {
            if (parameter != null && !Parameters.ContainsKey(parameter))
            {
                Parameters.Add(parameter, value);
            }
        }
    }
}