How to i update a TraceSwitch from app.config in runtime - without
restarting the application.

I use dotNet 3.5.

I know how to refresh the section in memory, but i dont know how to read the
properties from the updated section.
This is what i have:

System.Configuration.ConfigurationManager.RefreshSection("system.diagnostic s");
object section =
System.Configuration.ConfigurationManager.GetSection("system.diagnostics");
TraceSwitch fileTraceLevel = new TraceSwitch("FileTraceListenerSwitch",
"explanation...");
    or
fileTraeLevel.Level = (TraceLevel)section.??? !!

How do i get the level information from the section ??

As the MSDN documentation says,
(http://msdn.microsoft.com/en-us/library/system.diagnostics.traceswitc...
)
"In your application, you can use the configured switch level by creating a
TraceSwitch with the same name"

So, we can just create a new instance of TraceSwitch that has the same name
as the one in configuration file to access the configured switch. For
example, I have the following part in the app.config,
------------------------------------------------
  <system.diagnostics>
    <switches>
      <add name="mySwitch" value="1" />
    </switches>
  </system.diagnostics>
------------------------------------------------

Then in the application, to get the TraceSwitch level, I just need to use
the following codes,
------------------------------------------------
        private static TraceSwitch appSwitch = new
TraceSwitch("mySwitch","Switch in config file");

        static void Main(string[] args)
        {
            Console.WriteLine("Trace switch {0} configured as
{1}",appSwitch.DisplayName, appSwitch.Level.ToString());
        }
------------------------------------------------

I have tested the above codes and it works fine.

Thank you for your comment.

But, if you changed the level in a app.config, belonging to a running
application, the application does not see the change until the app is
restarted.
Isn't that right ??

BR
Peter

"Colbert Zhou [MSFT]" <colbe...@online.microsoft.com> wrote in message
news:xjZM1BySKHA.2084@TK2MSFTNGHUB02.phx.gbl...

The new app.Config file is loaded after the RefreshSection calling. It is
just the Trace data does not update. We can call Trace.Refresh to update it.

        static void Main(string[] args)
        {
            TraceSwitch appSwitch = new TraceSwitch("mySwitch", "Switch in
config file");
            Console.WriteLine("Trace switch {0} configured as {1}",
appSwitch.DisplayName, appSwitch.Level.ToString());
            System.Diagnostics.Debugger.Break();

System.Configuration.ConfigurationManager.RefreshSection("system.diagnostic s
");
            System.Diagnostics.Trace.Refresh();
            Console.WriteLine("Trace switch {0} configured as
{1}",appSwitch.DisplayName, appSwitch.Level.ToString());
        }

Please note if you are debugging the codes, the config to modify is
***.vshost.exe.config.

Please give it a try and let me know it works for you!

Thanks for the reply.
I will look into this monday/tuesday next week where i'm going to work on
the project where i have this problem.

BR
Peter

"Colbert Zhou [MSFT]" <colbe...@online.microsoft.com> wrote in message
news:O8n7n5XTKHA.2716@TK2MSFTNGHUB02.phx.gbl...

I have tried what you suggested and it works.
I think i have missed the refresh method on Trace.

Why is it that "appSettings" is available after RefreshSection() and trace
isn't ??

BR
Peter

"Colbert Zhou [MSFT]" <colbe...@online.microsoft.com> wrote in message
news:O8n7n5XTKHA.2716@TK2MSFTNGHUB02.phx.gbl...