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记录下这个笔记, 方便以后查阅. log4net使用了控制台输出和文件轮换输出.

1. 新建工程
2. 添加对log4net.dll的引用
3. 在AssemblyInfo.cs中增加[assembly: log4net.Config.XmlConfigurator(Watch = true)]
4. 增加应用程序配置文件App.config, 完整内容为:

   <?xml version="1.0" encoding="utf-8" ?>
   <configuration>
     <!-- Register a section handler for the log4net section -->
     <configSections>
       <section name="log4net" type="System.Configuration.IgnoreSectionHandler" />
     </configSections>
   
     <log4net>
       <appender name="A_CONSOLE" type="log4net.Appender.ConsoleAppender">
         <layout type="log4net.Layout.PatternLayout">
           <conversionPattern value="%date{HH:mm:ss,fff} [%-5level] %logger{1} - %message%newline" />
         </layout>
       </appender>
   
       <appender name="A_FILE" type="log4net.Appender.RollingFileAppender">
   	  <file value="log.txt" />
   	  <appendToFile value="true" />
   	  <rollingStyle value="Size" />
   	  <maximumFileSize value="1024KB" />
   	  <maxSizeRollBackups value="3" />
         <layout type="log4net.Layout.PatternLayout">
           <conversionPattern value="%date{yyyy-MM-dd HH:mm:ss.fff} [%-5level] %logger{1} - %message%newline" />
         </layout>
       </appender>
   
       <!-- Set root logger level to DEBUG and its only appender to A1 -->
       <root>
         <level value="DEBUG" />
         <appender-ref ref="A_CONSOLE" />
         <appender-ref ref="A_FILE" />
       </root>
   
     </log4net>
   </configuration>
   

5. 使用:

   log4net.ILog log = log4net.LogManager.GetLogger(
       System.Reflection.MethodBase.GetCurrentMethod().DeclaringType);
   log.Debug("ideawu.net");
   

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