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Trace.Close Method

Flushes the output buffer, and then closes the Listeners.

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

[ConditionalAttribute("TRACE")] 
public static void Close ()
/** @attribute ConditionalAttribute("TRACE") */ 
public static void Close ()
ConditionalAttribute("TRACE") 
public static function Close ()

Use this method when the output is going to a file, such as to the TextWriterTraceListener.

Flushing the stream will not flush its underlying encoder unless you explicitly call Flush or Close. Setting AutoFlush to true means that data will be flushed from the buffer to the stream, but the encoder state will not be flushed. This allows the encoder to keep its state (partial characters) so that it can encode the next block of characters correctly. This scenario affects UTF8 and UTF7 where certain characters can only be encoded after the encoder receives the adjacent character or characters.

The following example creates a TextWriterTraceListener named myTextListener. myTextListener uses a StreamWriter called myOutputWriter to write to a file named TestFile.txt. The example creates the file, stream and text writer, writes one line of text to the file, and then flushes and closes the output.

public static void Main(string[] args) {
    // Create a file for output named TestFile.txt.
    String myFileName = "TestFile.txt";
    if(!File.Exists(myFileName))
    {
       Stream myFile = File.Create(myFileName);
 
    // Assign output file to output stream.
    StreamWriter myOutputWriter;
    myOutputWriter = File.AppendText(myFileName);
 
    /* Create a new text writer using the output stream, and 
     * add it to the trace listeners. */
    TextWriterTraceListener myTextListener = new 
       TextWriterTraceListener(myOutputWriter);
    Trace.Listeners.Add(myTextListener);
 
    // Write output to the file.
    Trace.WriteLine("Test output");
 
    // Flush and close the output stream.
    Trace.Flush();
    Trace.Close();
   }
 }
 

public static void main(String[] args)
{
    // Create a file for output named TestFile.txt.
    String myFileName = "TestFile.txt";
    if (!(File.Exists(myFileName))) {
        Stream myFile = File.Create(myFileName);

        // Assign output file to output stream.
        StreamWriter myOutputWriter;
        myOutputWriter = File.AppendText(myFileName);

        /* Create a new text writer using the output stream, and 
         * add it to the trace listeners. 
         */
        TextWriterTraceListener myTextListener =
            new TextWriterTraceListener(myOutputWriter);
        Trace.get_Listeners().Add(myTextListener);

        // Write output to the file.
        Trace.WriteLine("Test output");

        // Flush and close the output stream.
        Trace.Flush();
        Trace.Close();
    }
} //main

// Open or create a file stream for output named TestFile.txt.
var myOutputWriter : FileStream = File.OpenWrite("TestFile.txt")

// Specify myOutputWriter as the Trace output stream by
// adding it to the trace listeners. 
Trace.Listeners.Add(new TextWriterTraceListener(myOutputWriter))

// Write output to the file.
Trace.WriteLine("Test output")

// Flush and close the output stream.
Trace.Flush()
Trace.Close()


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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