Using other log4net logging levels than the usual ones

Question

I've realised that there is more levels than all, debug, info, warn, error and fatal, they are listed in the log4net.Core.Level class.

But how can I use them? I mean, in the ILog interface you have methods to use the usual ones, but what if you want to use "Fine" or "Emergency", etc?

Cheers.

Answer 1

In the following example Log is of type ILog.

Log.Logger.Log(null, log4net.Core.Level.Emergency, "Help!", null);

For each level you check their Value in order to know when they are disabled.

For log4net version 1.2.10.0 you have the following levels and associated cut off values:

OFF: 2147483647
EMERGENCY: 120000
FATAL: 110000
ALERT: 100000
CRITICAL: 90000
SEVERE: 80000
ERROR: 70000
WARN: 60000
NOTICE: 50000
INFO: 40000
DEBUG: 30000
FINE: 30000
TRACE: 20000
FINER: 20000
VERBOSE: 10000
FINEST: 10000
ALL: -2147483648

Note that some levels share the same values so disabling one of them will also disable the other, like for example TRACE and FINER.

Answer 2

To extend on the good answer already provided:

You can also add the following extension method:

 static public void Notice( this ILog log, object message )
 { 
     log.Logger.Log( null, log4net.Core.Level.Notice, message, null);
 }

Then use as:

Log.Notice("Take note!");

Where Log is of type ILog