Following statements are not supportet...

// Getting a Specific Appender from a specific logger
 IAppender myapp =
LogManager.GetLogger("MyNamedLogger1").GetAppender("MyNamedAppender");

// attaching a specific Appender to a specific logger
 LogManager.GetLogger("MyNamedLogger1").SetAppender("MyNamedAppender");


How can I access a desired Appender of a known logger directly, without
iterating over all Appenders and query thier names?


How can I attach a specific Appender to an Specific Logger ?
Thanks in Advance


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Try this:

Hierarchy hier = (Hierarchy)LogManager.GetRepository();
Logger mylog = (Logger)hier.GetLogger("MyNamedLogger1");
IAppender myap = mylog.GetAppender("MyNamedAppender");

There is only one problem with this, and that is that if the logger
doesn't exist, log4net will create it.  myap will still return as null,
because the newly created logger won't have that appender, but then
you've got a junk logger in your repository.

You can prevent that by replacing your GetLogger() call with a looping
search:

Hierarchy hier = (Hierarchy)LogManager.GetRepository();
foreach (ILogger l in hier.GetCurrentLoggers()) {
    if (l.Name.Equals(loggerName)) {
        IAppender myap = l.GetAppender("MyNamedAppender");
        if (myap != null) {
            // do stuff
        }
    }
}

...but then you're back to looping.

Hello Francine

Thanks, that was what I had searched for!

For setting an appender, i would make something like this:

Hierarchy hier = (Hierarchy)LogManager.GetRepository();
        Logger mylog = (Logger)hier.GetLogger("MyNamedLogger1");
        IAppender memap = new MemoryAppender();
        memap.Name = "blabla";
        mylog.AddAppender(memap);

Have a great time!
bye