Log4net从下载到使用例子

一、首先下载log4net.dll   http://pan.baidu.com/s/1gdigrwJ

二、添加log4net引用

三、代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using log4net;
using System.Reflection;

namespace WebApplication1
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            ILog log = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
            //记录错误日志
            log.Error("error", new Exception("发生了一个异常"));
            //记录严重错误
            log.Fatal("fatal", new Exception("发生了一个致命错误"));
            //记录一般信息
            log.Info("info");
            //记录调试信息
            log.Debug("debug");
            //记录警告信息
            log.Warn("warn");
        }
    }
}

四、config匹配

<log4net>
  <!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->
  <!-- Set root logger level to ERROR and its appenders -->
  <root>
    <level value="ALL"/>
    <appender-ref ref="SysAppender"/>
  </root>

  <!-- Print only messages of level DEBUG or above in the packages -->
  <logger name="WebLogger">
    <level value="DEBUG"/>
  </logger>

  <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" >
    <param name="File" value="App_Data/" />
    <param name="AppendToFile" value="true" />
    <param name="RollingStyle" value="Date" />
    <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
    <param name="StaticLogFileName" value="false" />
    <layout type="log4net.Layout.PatternLayout,log4net">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
      <param name="Header" value="&#13;&#10;----------------------header--------------------------&#13;&#10;" />
      <param name="Footer" value="&#13;&#10;----------------------footer--------------------------&#13;&#10;" />
    </layout>
  </appender>
  <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
    <layout type="log4net.Layout.PatternLayout,log4net">
      <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
    </layout>
  </appender>
</log4net>

 五、如果想让log4net的config单独成log4net.config可以在程序集信息配置

代码：

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