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)
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 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
