Vb.net – How to configure log4net so that log.IsDebugEnabled is true


I am trying to use log4net in an ASP.NET application with Visual Studio 2005. I have declared an instance of the logger like so:

Private Shared ReadOnly log As ILog = LogManager.GetLogger("")

I am trying to use it in the following manner:

If log.IsDebugEnabled Then
   log.Debug("Integration Services Constructed")
End If

Here is my configuration:


        <level value="DEBUG" />
        <appender-ref ref="RollingFileAppender" />

    <appender name="RollingFileAppender" type="log4net.Appender.RollingFileAppender">
        <file value="..\\logs\\logfile.log"/>
        <appendToFile value="true"/>
        <rollingStyle value="Size"/>
        <maxSizeRollBackups value="10"/>
        <maximumFileSize value="1MB"/>
        <staticLogFileName value="true"/>
        <layout type="log4net.Layout.PatternLayout">
            <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline"/>
        <filter type="log4net.Filter.LevelRangeFilter">
            <param name="LevelMin" value="DEBUG" />
            <param name="LevelMax" value="FATAL" />


Unfortunately, log.IsDebugEnabled is always false.
How do I configure log4net so that I can log only debug messages?

Best Solution

Before calling LogManager.GetLogger("")

You have to call log4net.Config.XmlConfigurator.Configure(); In an ASP.NET app you probably want to put this call in Application_Start