TraceTimer : using(var timer = new TraceTimer("doing somethign"){ TraceLevel = TraceLevel.Verbose}){ STUFF ...}

gistfile1.txt

using System;
using System.Diagnostics;

namespace Composite.WindowsAzure.Util
{

    /// <summary>
    /// Wrap TraceTimer around a code block with using and it will write out the time used for the block to trace.
    /// </summary>
    public class TraceTimer : IDisposable
    {
        /// <summary>
        /// Set the TraceLevel that should be written to, default is verbose.
        /// </summary>
        public TraceLevel TraceLevel { get; set; }
        /// <summary>
        /// If a value is set then the trace will only be written if it takes longer than the threshold.
        /// </summary>
        public long Threshold { get; set; }

        string _action;   
        private double time;

        /// <summary>
        /// Get the starting time for this trace timer.
        /// </summary>
        public DateTime Start{get;private set;}

        public TraceTimer(string action)
        {          
            _action = action;
            Start = DateTime.Now;
            TraceLevel = TraceLevel.Verbose;
            Threshold = 0;

           
        }

        private string TraceString(string format, params object[] args)
        {
            
             string msInfo = time.ToString("#########");
            
             return string.Format("{0}ms : {1}", msInfo.PadLeft(9), string.Format(format,args));
        }

        public void Dispose()
        {
            time = (DateTime.Now - Start).TotalMilliseconds;
            if(time > Threshold)
            switch (TraceLevel)
            {
                case TraceLevel.Error:
                   Trace.TraceError(TraceString(_action));
                   break;
                case TraceLevel.Info:
                    Trace.TraceInformation(TraceString(_action));
                    break;
                case TraceLevel.Warning:
                   Trace.TraceWarning(TraceString(_action));
                   break;
                default:
                   Trace.WriteLine(TraceString(_action),"Verbose"); 
                 break;
            }

            
           
        }
    }
}