LOG4NET用法

<?xml version="1.0" encoding="utf-8" ?>
<configuration>
 <configSections>
  <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
 </configSections>
 <log4net>
  <logger name="logerror">
   <level value="ERROR" />
   <appender-ref ref="ErrorAppender" />
  </logger>
  <logger name="loginfo">
   <level value="INFO" />
   <appender-ref ref="InfoAppender" />
  </logger>
  <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
   <param name="File" value="Log\\LogError\\" />
   <param name="AppendToFile" value="true" />
   <param name="MaxSizeRollBackups" value="100" />
   <param name="MaxFileSize" value="10240" />
   <param name="StaticLogFileName" value="false" />
   <param name="DatePattern" value="yyyyMMdd&quot;.htm&quot;" />
   <param name="RollingStyle" value="Date" />
   <layout type="log4net.Layout.PatternLayout">
    <param name="ConversionPattern" value="&lt;HR COLOR=red&gt;%n异常时间：%d [%t] &lt;BR&gt;%n异常级别：%-5p 
   &lt;BR&gt;%n异 常 类：%c [%x] &lt;BR&gt;%n%m &lt;BR&gt;%n &lt;HR Size=1&gt;" />
   </layout>
  </appender>
  <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
   <param name="File" value="Log\\LogInfo\\" />
   <param name="AppendToFile" value="true" />
   <param name="MaxFileSize" value="10240" />
   <param name="MaxSizeRollBackups" value="100" />
   <param name="StaticLogFileName" value="false" />
   <param name="DatePattern" value="yyyyMMdd&quot;.htm&quot;" />
   <param name="RollingStyle" value="Date" />
   <layout type="log4net.Layout.PatternLayout">
    <param name="ConversionPattern" value="&lt;HR COLOR=blue&gt;%n日志时间：%d [%t] &lt;BR&gt;%n日志级别：%-5p 
   &lt;BR&gt;%n日 志 类：%c [%x] &lt;BR&gt;%n%m &lt;BR&gt;%n &lt;HR Size=1&gt;" />
   </layout>
  </appender>
 </log4net>
 <system.web>
  <compilation defaultLanguage="c#" debug="true" />
  <customErrors mode="RemoteOnly" />
  <authentication mode="Windows" />
  <authorization>
   <allow users="*" />
  </authorization>
  <trace enabled="false" requestLimit="10" pageOutput="false" traceMode="SortByTime" localOnly="true" />
  <sessionState mode="InProc" stateConnectionString="tcpip=127.0.0.1:42424" sqlConnectionString="data source=127.0.0.1;Trusted_Connection=yes"
   cookieless="false" timeout="20" />
  <globalization requestEncoding="utf-8" responseEncoding="utf-8" />
 </system.web>
</configuration>

using System;
using System.IO;

namespace TankAction.SystemLog
{
    /// <summary>
    /// LogHelper的摘要说明。
    /// </summary>
    public class LogHelper
    {
        private SystemLog()
        {
        }

        public static readonly log4net.ILog loginfo = log4net.LogManager.GetLogger("loginfo");

        public static readonly log4net.ILog logerror = log4net.LogManager.GetLogger("logerror");

        public static void SetConfig()
        {
            log4net.Config.DOMConfigurator.Configure();
        }

        public static void SetConfig(FileInfo configFile)
        {
            log4net.Config.DOMConfigurator.Configure(configFile); 
        }

        public static void WriteLog(string info)
        {
            if(loginfo.IsInfoEnabled)
            {
                loginfo.Info(info);
            }
        }

        public static void WriteLog(string info,Exception se)
        {
            if(logerror.IsErrorEnabled)
            {
                logerror.Error(info,se);
            }
        }
    }
}

protected void Application_Start(Object sender, EventArgs e)
  {
            SystemLog.SetConfig();
  }
  protected void Application_Error(Object sender, EventArgs e)
  {
   Exception objExp = HttpContext.Current.Server.GetLastError();
   LogHelper.WriteLog("\r\n客户机IP:"+ Request.UserHostAddress +"\r\n错误地址:"+ Request.Url +"\r\n异常信息:"+ Server.GetLastError().Message,objExp);
  }