If you download and install this free program:
http://www.sysinternals.com/ntw2k/freeware/debugview.shtml
And setup log4net to run in Debug mode:
<appSettings>
<add key="log4net.Internal.Debug" value="true" />
</appSettings>
You should be able to see your Appenders being initialized and/or the
exceptions that are caused by incorrectly configured Appenders.
This is how I log that information to a file in my Asp.Net application:
if (log4netIsInDebugMode() == true)
{
// if log4net is in debug mode (useful for discovering why appenders
are not working), it will
// print out internal messages and errors to the System.Console and to
System.Diagnostics.Trace;
// the code below will capture log4net output and attempt to write it
to a known writeable
// directory;
string physicalPathLogFile =
Path.Combine(System.Web.HttpRuntime.AppDomainAppPath,
LOG4NET_LOG_FILE);
try
{
FileStream fileStream = new FileStream(physicalPathLogFile,
FileMode.Create, FileAccess.Write );
if (fileStream != null && fileStream.CanWrite)
{
// this doesn't affect Trace.axd becuase Trace.axd is
from
System.Web.TraceContext
// System.Diagnostics.Trace.Listeners.Clear();
System.Diagnostics.Trace.Listeners.Add(new
TextWriterTraceListener(fileStream));
}
}
catch(SystemException ex)
{
// System.UnauthorizedAccessException - The exception that is
thrown
when the operating system denies access because of an I/O error or a
specific type of security error.
// log the message to a location that was the cause for the
exception
???
System.Diagnostics.Trace.Write("log4net", "Unable to create
log4net
logger at [" + physicalPathLogFile + "]. Exception: " + ex.ToString());
}
}
log4net.Config.DOMConfigurator.Configure();
// make sure the complete log4net startup log appears
System.Diagnostics.Trace.Flush();
- Ron
--- "Collier, Mike" <[EMAIL PROTECTED]> wrote:
> How would I use the ErrorHandler property for an appender? For
> example,
> let's assume I'm using the ADONetAppender and for some reason it
> fails
> (i.e. unable to connect to the database server). I would like to not
> loose the message. I was thinking that I could use the ErrorHandler
> property to define another appender to use in this case. However,
> I'm
> not sure how to do this. Does anybody have any examples or ideas on
> how
> this might be accomplished.
>
> Thanks!
>
>
>
>
>
>
