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TextWriterTraceListener Constructor (TextWriter)

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

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

public TextWriterTraceListener(
	TextWriter writer
)

Parameters

writer
Type: System.IO.TextWriter

A TextWriter that receives the output from the TextWriterTraceListener.

ExceptionCondition
ArgumentNullException

The writer is null.

This constructor initializes the Name property to an empty string ("").

The following code example creates a TextWriterTraceListener using the TextWriterTraceListener(TextWriter) 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 a message to all TraceListener objects in the TraceListenerCollection, then closes this TextWriterTraceListener.

#define TRACE

using System;
using System.IO;
using System.Diagnostics;

public class TextWriterTraceListenerSample
{
    public static void Main() 
    {
        TextWriterTraceListener myTextListener = null;

        // Create a file for output named TestFile.txt.
        String myFileName = "TestFile.txt";
        StreamWriter myOutputWriter = new StreamWriter(myFileName, true);

        // Add a TextWriterTraceListener for the file.
        myTextListener = new TextWriterTraceListener(myOutputWriter);
        Trace.Listeners.Add(myTextListener);


        // Write trace output to all trace listeners.
        Trace.WriteLine(DateTime.Now.ToString() + " - Trace output");

        // Remove and close the file writer/trace listener.
        myTextListener.Flush();
        Trace.Listeners.Remove(myTextListener);
        myTextListener.Close();
    }
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0
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