Log4Net使用入门

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1. 在NuGet程序包中添加log4net引用
2. 在config文件里面添加如下配置代码 

    1 <configuration>
    2   <configSections>
    3     <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
    4   </configSections>
    5   <log4net>
    6     <!--定义输出到文件中-->
    7     <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
    8       <!--定义文件存放位置-->
    9       <file value="log\\"/>
   10       <appendToFile value="true"/>
   11       <rollingStyle value="Date"/>
   12       <datePattern value="yyyy\\yyyyMM\\yyyyMMdd‘.txt‘"/>
   13       <staticLogFileName value="false"/>
   14       <param name="MaxSizeRollBackups" value="100"/>
   15       <layout type="log4net.Layout.PatternLayout">
   16         <!--每条日志末尾的文字说明-->
   17         <!--输出格式-->
   18         <!--样例：2008-03-26 13:42:32,111 [10] INFO  Log4NetDemo.MainClass [(null)] - info-->
   19         <conversionPattern value="%newline %n记录时间：%date %n线程ID:[%thread] %n日志级别：  %-5level %n出错类：%logger property: [%property{NDC}] - %n错误描述：%message%newline %n"/>
   20       </layout>
   21     </appender>
   22     <root>
   23       <level value="ERROR"/>
   24       <!--文件形式记录日志-->
   25       <appender-ref ref="RollingLogFileAppender"/>
   26     </root>
   27   </log4net>
   28 </configuration>

3. 可以新建日志共用类,以方便调用

    1 using System;
    2 using System.Collections.Generic;
    3 using System.Linq;
    4 using System.Text;
    5 
    6 [assembly: log4net.Config.XmlConfigurator(Watch = true)]
    7 namespace TestLog4Net
    8 {
    9    public  class LogHelper
   10     {
   11         /// <summary>
   12         /// 输出日志到Log4Net
   13         /// </summary>
   14         /// <param name="t"></param>
   15         /// <param name="ex"></param>
   16         #region static void WriteLog(Type t, Exception ex)
   17         public static void WriteLog(Type t, Exception ex)
   18         {
   19             log4net.ILog log = log4net.LogManager.GetLogger(t);
   20             log.Error("Error", ex);
   21         }
   22         #endregion
   23 
   24         /// <summary>
   25         /// 输出日志到Log4Net
   26         /// </summary>
   27         /// <param name="t"></param>
   28         /// <param name="msg"></param>
   29         #region static void WriteLog(Type t, string msg)
   30         public static void WriteLog(Type t, string msg)
   31         {
   32             log4net.ILog log = log4net.LogManager.GetLogger(t);
   33             log.Error(msg);
   34         }
   35         #endregion
   36     }
   37 }

4. 调用方式:

   // HOW TO USE
    LogHelper.WriteLog(typeof(WebForm1), "test");

Log4Net使用入门

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原文地址：http://www.cnblogs.com/Czhipu/p/4829054.html