log4net basic example - write to file

 

<?xml version="1.0"?>
<configuration>
  <configSections>
    <section name="SubSonicService" type="SubSonic.SubSonicSection, SubSonic" requirePermission="false"/>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>
  </configSections>

  <log4net>
    <logger name="loginfo">
      <level value="ALL"/>
      <appender-ref ref="InfoAppender"/>
    </logger>
    
    <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Log\\test.log"/>
      <param name="AppendToFile" value="false"/>
      <param name="MaximumFileSize" value="1KB"/>
      <param name="MaxSizeRollBackups" value="100"/>
      <param name="DatePattern" value="yyyy-MM-dd"/>
      <param name="RollingStyle" value="Date"/>
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>

    <!-- Set root logger level to DEBUG and its only appender to A1 --><!--
    <root>
      <level value="ALL"/>
      <appender-ref ref="InfoAppender"/>
    </root>-->
  </log4net>
<startup><supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.0"/></startup></configuration>

using log4net;
using log4net.Config;

namespace TestLog4Net
{
    class Program
    {
        static readonly ILog logger = LogManager.GetLogger("loginfo");
        static void Main(string[] args)
        {
            try
            {
                log4net.Config.XmlConfigurator.Configure();
                logger.Debug("Here is a debug log.");
                logger.Info("... and an Info log.");
                logger.Warn("... and a warning.");
                logger.Error("... and an error.");
                logger.Fatal("... and a fatal error.");
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
                Console.ReadLine();
            }
        }
    }
}