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TextWriterTraceListener Constructor (Stream, String)

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

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

public TextWriterTraceListener (
	Stream stream,
	string name
)
public TextWriterTraceListener (
	Stream stream, 
	String name
)
public function TextWriterTraceListener (
	stream : Stream, 
	name : String
)

Parameters

stream

A Stream that represents the stream 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(Stream,String) constructor and adds it to the TraceListenerCollection. The example then writes two messages to this TextWriterTraceListener and writes a message to all TraceListener objects in the TraceListenerCollection. Finally, it flushes and closes the TextWriterTraceListener.

Imports System
Imports System.Diagnostics
Imports System.IO
Imports Microsoft.VisualBasic

Module TWTLConStreamNameMod

    Const LISTENER_NAME As String = "myStreamListener"

    ' args(0) is the specification of the trace log file.
    Sub Main(ByVal args() As String)

        ' Verify that a parameter was entered.
        If args.Length = 0 Then
            Console.WriteLine("Enter a trace file specification.")

        Else
            ' Create a stream object.
            Dim traceStream As FileStream
            Try
                traceStream = New FileStream( _
                    args(0), FileMode.Append, FileAccess.Write)
            Catch ex As Exception
                Console.WriteLine( _
                    "Error creating FileStream for trace file ""{0}"":" & _
                    vbCrLf & "{1}", args(0), ex.Message)
                Return
            End Try

            ' Create a TextWriterTraceListener object that takes a stream.
            Dim textListener As TextWriterTraceListener
            textListener = _
                New TextWriterTraceListener(traceStream, LISTENER_NAME)
            Trace.Listeners.Add(textListener)

            ' Write these messages only to the TextWriterTraceListener.
            textListener.WriteLine( _
                "This is trace listener named """ & textListener.Name & """")
            textListener.WriteLine( _
                "Trace written through a stream to: " & _
                vbCrLf & "    """ & args(0) & """")

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

            ' Flush and close the output.
            Trace.Flush()
            textListener.Flush()
            textListener.Close()
        End If
    End Sub
End Module

Windows 98, Windows 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 .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.

.NET Framework

Supported in: 2.0, 1.1, 1.0

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