log4net Configuration for console app

Question

can anyone suggest how to configure the log4net for an console app?

Or at least how/where to catch the Application_Start event? (It seams that some calls are required at this moment)

Thanks in advance!

score 13 · Answer 1 · answered Nov 18 '09 at 07:12

13

Try writing

[assembly: log4net.Config.XmlConfigurator(Watch = true)]

in AssemblyInfo.cs

That's it!

answered Nov 18 '09 at 07:12

Ron Klein

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What is this supposed to do ? I doesn't seem to help anything in my case. – Tomas Pajonk Jun 24 '10 at 16:39
It is supposed to 1) tell log4net to configure itself using the default settings (app.config) 2) cause log4net to auto-reload it's configuration when the underlying file that contains the log4net entry changes. – Andrew Backer Aug 30 '11 at 09:30
@Tomas you also need to add the log4net config to the app.config file – codeulike Jul 03 '13 at 13:00

score 10 · Accepted Answer · edited Jan 30 '14 at 18:01

You need to configure it before the first logger is instantiated.

To do so:

Your main class (Program.cs) should not have a logger
The main method should not reference any classes that have a logger.
You can then configure log4net in the main method.

Alternatively you can use a wrapper class to instantiate loggers, that ensures log4net is configured before creating a logger, e.g.:

static class Log4NetHelper
{
    private static bool _isConfigured;

    static void EnsureConfigured()
    {
        if (!_isConfigured)
        {
            ... configure log4net here ...
            _isConfigured = true;
        }
    }

    public static ILog GetLogger(string name)
    {
        EnsureConfigured();
        log4net.ILog logger = log4net.LogManager.GetLogger(name);
        return logger;
    }
}

log4net Configuration for console app

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