TraceListener issue

[Mullin Yu]

i have a problem with TraceListener. when i close the FileStream, i will
have the error:
"Cannot access a closed file"

but, if i remarks the statement => no closing the FileStream, i will have
another error:
"The process cannot access the file "C:\MyAppsTrace Log.log" because it is
being used by another process."

Remind that it's ok when i click the button once. the problem arises when
clicking at the second time.

my coding is:
private void button1_Click(o bject sender, System.EventArg s e)

{

// Create a TextWriteTraceL istener to

// capture all Debug and Trace messages

// Define our tracing log file

System.IO.FileS tream traceLog = new
System.IO.FileS tream(@"C:\MyAp psTraceLog.log" ,

System.IO.FileM ode.OpenOrCreat e);

// Instantiate a new TextWriterTrace Listener and specify the output location

TextWriterTrace Listener traceListener = new
TextWriterTrace Listener(traceL og);

// Add Listener to the Listeners collection

Trace.Listeners .Add(traceListe ner);

// Send our tracing messages

Trace.WriteLine ("Trace Message 1");

Debug.WriteLine ("You are here.");

Trace.WriteLine ("Trace Message 2");

// Flush the listners buffer and close the output

Trace.Flush();

// if remark => file is accessed by another process

// traceLog.Close( )

traceLog.Close( );

}

[Dmitriy Lapshin [C# / .NET MVP]]

Hi,

You can try closing the stream by using the Trace's Close method, not the
FileStream's one.
You don't need an explicit call to Flush then.

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://www.x-unity.net/teststudio.aspx
Bring the power of unit testing to VS .NET IDE

"Mullin Yu" <mu*******@ctil .com> wrote in message
news:uj******** ******@TK2MSFTN GP12.phx.gbl...

i have a problem with TraceListener. when i close the FileStream, i will
have the error:
"Cannot access a closed file"

but, if i remarks the statement => no closing the FileStream, i will have
another error:
"The process cannot access the file "C:\MyAppsTrace Log.log" because it is
being used by another process."

Remind that it's ok when i click the button once. the problem arises when
clicking at the second time.

my coding is:
private void button1_Click(o bject sender, System.EventArg s e)

{

// Create a TextWriteTraceL istener to

// capture all Debug and Trace messages

// Define our tracing log file

System.IO.FileS tream traceLog = new
System.IO.FileS tream(@"C:\MyAp psTraceLog.log" ,

System.IO.FileM ode.OpenOrCreat e);

// Instantiate a new TextWriterTrace Listener and specify the output location
TextWriterTrace Listener traceListener = new
TextWriterTrace Listener(traceL og);

// Add Listener to the Listeners collection

Trace.Listeners .Add(traceListe ner);

// Send our tracing messages

Trace.WriteLine ("Trace Message 1");

Debug.WriteLine ("You are here.");

Trace.WriteLine ("Trace Message 2");

// Flush the listners buffer and close the output

Trace.Flush();

// if remark => file is accessed by another process

// traceLog.Close( )

traceLog.Close( );

}

[Mullin Yu]

i tried Trace.Close();

but, still having error when clicking second tme of the button.

the error is:
Cannot write to a closed TextWriter

therefore, it seems that i can't close it.

thanks!

"Dmitriy Lapshin [C# / .NET MVP]" <x-****@no-spam-please.hotpop.c om> wrote
in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Hi,

You can try closing the stream by using the Trace's Close method, not the
FileStream's one.
You don't need an explicit call to Flush then.

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://www.x-unity.net/teststudio.aspx
Bring the power of unit testing to VS .NET IDE

"Mullin Yu" <mu*******@ctil .com> wrote in message
news:uj******** ******@TK2MSFTN GP12.phx.gbl...

i have a problem with TraceListener. when i close the FileStream, i will
have the error:
"Cannot access a closed file"

but, if i remarks the statement => no closing the FileStream, i will have another error:
"The process cannot access the file "C:\MyAppsTrace Log.log" because it is being used by another process."

Remind that it's ok when i click the button once. the problem arises when clicking at the second time.

my coding is:
private void button1_Click(o bject sender, System.EventArg s e)

{

// Create a TextWriteTraceL istener to

// capture all Debug and Trace messages

// Define our tracing log file

System.IO.FileS tream traceLog = new
System.IO.FileS tream(@"C:\MyAp psTraceLog.log" ,

System.IO.FileM ode.OpenOrCreat e);

// Instantiate a new TextWriterTrace Listener and specify the output

location

TextWriterTrace Listener traceListener = new
TextWriterTrace Listener(traceL og);

// Add Listener to the Listeners collection

Trace.Listeners .Add(traceListe ner);

// Send our tracing messages

Trace.WriteLine ("Trace Message 1");

Debug.WriteLine ("You are here.");

Trace.WriteLine ("Trace Message 2");

// Flush the listners buffer and close the output

Trace.Flush();

// if remark => file is accessed by another process

// traceLog.Close( )

traceLog.Close( );

}

[Mullin Yu]

i tried Trace.Close();

but, still having error when clicking second tme of the button.

the error is:
Cannot write to a closed TextWriter

therefore, it seems that i can't close it.

thanks!

"Dmitriy Lapshin [C# / .NET MVP]" <x-****@no-spam-please.hotpop.c om> wrote
in message news:%2******** ********@TK2MSF TNGP12.phx.gbl. ..

Hi,

You can try closing the stream by using the Trace's Close method, not the
FileStream's one.
You don't need an explicit call to Flush then.

--
Dmitriy Lapshin [C# / .NET MVP]
X-Unity Test Studio
http://www.x-unity.net/teststudio.aspx
Bring the power of unit testing to VS .NET IDE

"Mullin Yu" <mu*******@ctil .com> wrote in message
news:uj******** ******@TK2MSFTN GP12.phx.gbl...

i have a problem with TraceListener. when i close the FileStream, i will
have the error:
"Cannot access a closed file"

but, if i remarks the statement => no closing the FileStream, i will have another error:
"The process cannot access the file "C:\MyAppsTrace Log.log" because it is being used by another process."

Remind that it's ok when i click the button once. the problem arises when clicking at the second time.

my coding is:
private void button1_Click(o bject sender, System.EventArg s e)

{

// Create a TextWriteTraceL istener to

// capture all Debug and Trace messages

// Define our tracing log file

System.IO.FileS tream traceLog = new
System.IO.FileS tream(@"C:\MyAp psTraceLog.log" ,

System.IO.FileM ode.OpenOrCreat e);

// Instantiate a new TextWriterTrace Listener and specify the output

location

TextWriterTrace Listener traceListener = new
TextWriterTrace Listener(traceL og);

// Add Listener to the Listeners collection

Trace.Listeners .Add(traceListe ner);

// Send our tracing messages

Trace.WriteLine ("Trace Message 1");

Debug.WriteLine ("You are here.");

Trace.WriteLine ("Trace Message 2");

// Flush the listners buffer and close the output

Trace.Flush();

// if remark => file is accessed by another process

// traceLog.Close( )

traceLog.Close( );

}