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TextWriterTraceListener Constructor (String, String)

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
)

Parameters

fileName
Type: System.String

The name of the file the TextWriterTraceListener writes to.

name
Type: System.String

The name of the new instance.

ExceptionCondition
ArgumentNullException

The stream is null.

This constructor initializes the Name property to the name parameter or to an empty string (""), if the name parameter is null.

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();
        }
    }
}

.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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