Hi,

How do I add custom level , like TRACE on top of existing log4net levels
?
I know that in log4j, I can extend Level class.
Does anybody have sample code for log4net to do this ?

Thank you,
Nik

I use appx this code to enable verbose logging (more detailed than
debug). I haven't managed to, or tried very hard to, enable "verbose"
logging using my log4net configuration file - any tips here is greatly
appreciated. Verbose logging is only used by our developers while
debugging code so the current code using an already existing separate
configuration file works well.

    class VBDLog : IVBDLog  // interface defines Verbose,Debug,Info
(...) methods
    {
        ...
        public static IVBDLog GetLogger(Type t)
        {
            Level level = log4net.spi.Level.VERBOSE; // actually read
from an external configuration file.
            ILog logger = log4net.LogManager.GetLogger(t);
            if (logger.Level == null)
            {
                logger.Additivity = true;
                logger.Level = level;
            }
            return logger;
        }
        ...
        public void Verbose(object msg)
        {
            logger.Logger.Log( logger.Logger.Name,
log4net.spi.Level.VERBOSE, msg);
        }
    }

Client code:

private static readonly IVBDLog log =
VBDLog.GetLogger(typeof(SomeClass));
...

if (log.IsVerboseEnabled)
    log.Verbose("Test");

Trace is also a predefined level in log4net just like Verbose (see the
Level class)

I hope this helps,

Dag

Nik,

There is an example extension in the log4net download that shows how to
add a trace level to log4net.
Have a look in extensions\net\1.0\log4net.Ext.Trace

Nicko

Hi,

From an earlier post:

>Nik,
>
>There is an example extension in the log4net download that shows how to
>add a trace level to log4net.
>Have a look in extensions\net\1.0\log4net.Ext.Trace
>
>Nicko

But what if I want to add a new level YYY ? It is not possible to extend the
log4net.spi.Level class (as it is sealed)? How should one do ?

Regards,

Henrik

Henrik,

You can create a new Level using the Level(int,string) constructor. As
long as the level is registered with the LoggerRepository it should be
usable, however you do need to register it before you load the
configuration file otherwise it will not be defined. You can create a
new level programmatically as follows:

// Create the new level
log4net.spi.Level level = new log4net.spi.Level(45000, "YYY");

// Register with the default LoggerRepository
log4net.LogManager.GetLoggerRepository().LevelMap.Add(level);

// Configure log4net
log4net.Config.DOMConfigurator.Configure();


Nicko

Henrik,

You can create a new Level using the Level(int,string) constructor. As
long as the level is registered with the LoggerRepository it should be
usable, however you do need to register it before you load the
configuration file otherwise it will not be defined. You can create a
new level programmatically as follows:

// Create the new level
log4net.spi.Level level = new log4net.spi.Level(45000, "YYY");

// Register with the default LoggerRepository
log4net.LogManager.GetLoggerRepository().LevelMap.Add(level);

// Configure log4net
log4net.Config.DOMConfigurator.Configure();


Nicko

Henrik,

> After adding the new level how can you write to it, for
> example if i created level "audit"

If you have a logger instance _log then you can write to it using your
audiLevel as follows:

_log.Logger.Log(this.GetType().FullName, auditLevel, "your message
here", null);

> i dont have log4net.Audittrail(...)

If you want to create your own log4net extension that adds a method like
Audit(object) then you should have a look at the example extension in
the log4net download that shows how to add a trace level to log4net.

Have a look in extensions\net\1.0\log4net.Ext.Trace

Cheers,

Nicko

Henrik,

> After adding the new level how can you write to it, for
> example if i created level "audit"

If you have a logger instance _log then you can write to it using your
audiLevel as follows:

_log.Logger.Log(this.GetType().FullName, auditLevel, "your message
here", null);

> i dont have log4net.Audittrail(...)

If you want to create your own log4net extension that adds a method like
Audit(object) then you should have a look at the example extension in
the log4net download that shows how to add a trace level to log4net.

Have a look in extensions\net\1.0\log4net.Ext.Trace

Cheers,

Nicko