TextWriterTraceListener Constructor (String, String)

TextWriterTraceListener.TextWriterTraceListener(String, String) Constructor

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

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

public TextWriterTraceListener (
	string fileName,
	string name
)
public TextWriterTraceListener (
	String fileName, 
	String name
)
public function TextWriterTraceListener (
	fileName : String, 
	name : String
)
Not applicable.

Parameters

fileName

The name of the file the TextWriterTraceListener writes to.

name

The name of the new instance.

Exception typeCondition

ArgumentNullException

The stream is a null reference (Nothing in Visual Basic).

This constructor initializes the Name property to the name parameter or to an empty string (""), if the name parameter is a null reference (Nothing in Visual Basic).

The following code example creates a TextWriterTraceListener using the TextWriterTraceListener(String,String) constructor, then adds it 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 Microsoft.VisualBasic;

class TWTLConStringNameMod
{

    const string LISTENER_NAME = "myStringListener";

    // 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 TextWriterTraceListener object that takes a 
            // file specification.
            TextWriterTraceListener textListener;
            try
            {
                textListener = new TextWriterTraceListener(args[0], LISTENER_NAME);
                Trace.Listeners.Add(textListener);
            }
            catch(Exception ex)
            {
                Console.WriteLine("Error creating TextWriterTraceListener for trace " +
                    "file \"{0}\":\r\n{1}", args[0], ex.Message);
                return;
            }

            // Write these messages only to this TextWriterTraceListener.
            textListener.WriteLine("This is trace listener named \""+textListener.Name+"\"");
            textListener.WriteLine("Trace written to a file: " +
                "\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 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

XNA Framework

Supported in: 1.0

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