Trace Related

Today I wrote a vey simple demo to show the use of Trace Relate class, which are all int the namespace System.Diagnostics: Trace, TraceSwitch, TraceListener.

App.config

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
  <system.diagnostics>
    <switches>
      <!--We can change the value here, and the swich could affect the function of Trace, 
      without recompile the whole system-->
      <add name="traceS" value="1"/>
    </switches>
  </system.diagnostics>
</configuration>

Code

using System;
using System.Collections.Generic;
using System.Text;
using System.Diagnostics;

namespace CommonTest
{
    class Program
    {
        static void Main(string[] args)
        {
            TextWriterTraceListener console = new TextWriterTraceListener(Console.Out);
            Trace.Listeners.Add(console);
            TraceSwitch traceS = new TraceSwitch("traceS", "Application Switch");
            
            int i = 1;
            while (i > 0)
            {
                Trace.AutoFlush = true;
                Trace.WriteLineIf(traceS.TraceWarning, "warning");
                Trace.WriteLineIf(traceS.TraceVerbose, "writeline");
                Trace.WriteLineIf(traceS.TraceInfo, "info");
                Trace.WriteLineIf(traceS.TraceError, "err");
                i--;
            }
            Console.Read();
        }
    }
}

Whatever, Trace and TraceSwitch are all simple concepts, and are really easy to use. Pay attention to this line of code:

TraceSwitch traceS = new TraceSwitch("traceS", "Application Switch");

The constructor of TraceSwitch will use the info of