[assembly: log4net.Config.XmlConfigurator(ConfigFile="Web.config", Watch=true)]   //For log4net 1.2.10.0

<configSections>
	<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
</configSections>
	
<log4net debug="true">
	<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
		<file value="C:\\TestProj\\TestLog.txt" />
		<appendToFile value="true" />
		<rollingStyle value="Size" />
		<maxSizeRollBackups value="10" />
		<maximumFileSize value="10MB" />
		<staticLogFileName value="true" />
		<layout type="log4net.Layout.PatternLayout">
			<conversionPattern value="%-5p %d %5rms %-22.22c{1} %-18.18M - %m%n" />
		</layout>
	</appender>
	
	<root>
		<level value="DEBUG" />
		<appender-ref ref="RollingLogFileAppender" />
	</root>
</log4net>

2006-07-14 20:26:04,033 [1736] ERROR Utility [PayStub] - Could not find a part of the path 
"c:\inetpub\wwwroot\TestProj\Template\PayStub.xml"

<appSettings>
    <add key="log4net.Internal.Debug" value="true" />
</appSettings>

<system.diagnostics>
    <trace autoflush="true">
        <listeners>
            <add name="textWriterTraceListener" 
               type="System.Diagnostics.TextWriterTraceListener" 
               initializeData="C:\\TestProj\\TestProjlog4net.txt" />
        </listeners>
    </trace>
</system.diagnostics>

a. Add namespace

using log4net;

b. Add below declarations within class definition

private static readonly ILog log = LogManager.GetLogger(typeof(TestPage1).Name);

private static readonly ILog log = LogManager.GetLogger(
  System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);

if (log.IsErrorEnabled)
{
    log.Error("Page Load failed : " + ex.Message);
}

if (log.IsDebugEnabled)
{
    log.Debug("Application loaded successfully.");
}

History

• 07/14/2006 - Article submitted.
• 07/19/2006 - Added Sample Project & updated the article.