Log4net configuration

web.config - add section:

	<configSections>
                ...
 		<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
 	</configSections>

web.config - log4net configuration:

	<log4net debug="true">
		<appender name="FileAppender_Global" type="log4net.Appender.FileAppender">
			<file value="./Logs/Global.log"/>
			<appendToFile value="true"/>
			<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
			<maximumFileSize value="2MB"/>
			<layout type="log4net.Layout.PatternLayout">
				<ConversionPattern value="[%d] %-5p (%5rms) %-30.30c{1} %-25.25M - %m%n"/>
			</layout>
		</appender>
		<appender name="FileAppender_Error" type="log4net.Appender.FileAppender">
			<file value="./Logs/Error.log"/>
			<appendToFile value="true"/>
			<lockingModel type="log4net.Appender.FileAppender+MinimalLock"/>
			<maximumFileSize value="2MB"/>
			<layout type="log4net.Layout.PatternLayout">
				<ConversionPattern value="[%d] %-5p (%5rms) %-30.30c{1} %-25.25M - %m%n"/>
			</layout>
		</appender>
		<logger name="Global">
			<level value="ALL"/>
			<appender-ref ref="FileAppender_Global"/>
		</logger>
		<logger name="Error">
			<level value="ALL"/>
			<appender-ref ref="FileAppender_Error"/>
		</logger>
		<root>
			<appender-ref ref="FileAppender_Global"/>
			<level value="ALL"/>"
		</root>
	</log4net>

Tell application where is config - AssemblyInfo.cs:

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

How use it in code:

        public readonly ILog log_Global = LogManager.GetLogger("Global");
        public readonly ILog log_Error = LogManager.GetLogger("Error");
        ...
        log_Global.Info("Application started.");
        ...
        try
        {
        ...
        }
        catch (Exception ex)
        {
            log_Error.Fatal("Fatal Error when ..." , ex);
        }

Debuging

Allow internal debugging in appsettings

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

Add listener <code>

<system.diagnostics>
  <trace autoflush="true">
    <listeners>
      <add
          name="textWriterTraceListener"
          type="System.Diagnostics.TextWriterTraceListener"
          initializeData="C:\temp\log4net.txt" />
    </listeners>
  </trace>
</system.diagnostics>

</code

Table of Contents

Log4net configuration

Debuging

References