TextWriterTraceListener Constructor (TextWriter)
Initializes a new instance of the TextWriterTraceListener class using the specified writer as recipient of the tracing or debugging output.
Assembly: System (in System.dll)
Parameters
- writer
- Type: System.IO.TextWriter
A TextWriter that receives the output from the TextWriterTraceListener.
| Exception | Condition |
|---|---|
| ArgumentNullException |
The writer is null. |
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(); } }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.