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TextWriterTraceListener Constructor (TextWriter, String)

Initializes a new instance of the TextWriterTraceListener class with the specified name, using the specified writer as recipient of the tracing or debugging output.

Namespace:  System.Diagnostics
Assembly:  System (in System.dll)

public TextWriterTraceListener(
	TextWriter writer,
	string name
)

Parameters

writer
Type: System.IO.TextWriter

A TextWriter that receives the output from the TextWriterTraceListener.

name
Type: System.String

The name of the new instance.

ExceptionCondition
ArgumentNullException

The writer is null.

The following code example creates a TextWriterTraceListener using the TextWriterTraceListener(TextWriter, String) constructor. The example creates a StreamWriter, then references the StreamWriter when it creates the TextWriterTraceListener, which it then adds to the TraceListenerCollection. The example writes two messages to this TextWriterTraceListener, then writes a message to all TraceListener objects in the TraceListenerCollection. Finally, it flushes and closes the TextWriterTraceListener.

using System;
using System.Diagnostics;
using System.IO;
using Microsoft.VisualBasic;

class TWTLConWriterNameMod
{

    const string LISTENER_NAME = "myWriterListener";

    // args(0) is the specification of the trace log file. 
    public static void Main(string[] args)
    {

        // Verify that a parameter was entered. 
        if (args.Length==0)
        {
            Console.WriteLine("Enter a trace file specification.");

        }
        else
        {
            // Create a StreamWriter object that supports appending.
            StreamWriter traceWriter;
            try
            {
                traceWriter = new StreamWriter(args[0], true);
            }
            catch(Exception ex)
            {
                Console.WriteLine("Error creating StreamWriter for trace file \"{0}\":" +
                    "\r\n{1}", args[0], ex.Message);
                return;
            }

            // Create a TextWriterTraceListener that takes a StreamWriter.
            TextWriterTraceListener textListener;
            textListener = new TextWriterTraceListener(traceWriter, LISTENER_NAME);
            Trace.Listeners.Add(textListener);

            // Write these messages only to this TextWriterTraceListener.
            textListener.WriteLine("This is trace listener named \""+textListener.Name+"\"");
            textListener.WriteLine("Trace written through a stream to: " +
                "\r\n    \""+args[0]+"\"");

            // Write a message to all trace listeners.
            Trace.WriteLine(String.Format("This trace message written {0} to all listeners.", DateTime.Now));

            // Flush and close the output.
            Trace.Flush();
            textListener.Flush();
            textListener.Close();
        }
    }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0, 2.0, 1.0
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