log4j 引入

配置文件

<configuration>
  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>
  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="log.txt" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="10" />
      <param name="MaximumFileSize" value="100000" />
      <param name="RollingStyle" value="Date" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value=".yyyy-MM-dd.'log'" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="Header" value="[BEGIN_LOG--------------------------------------]" />
        <param name="Footer" value="[END_LOG----------------------------------------]" />
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
      </layout>
    </appender>
    
    <root>
      <level value="info" />
      <appender-ref ref="RollingLogFileAppender" />
    
    </root>
  </log4net>

启动的时候 初始化

  log4net.Config.DOMConfigurator.Configure();


以后就可以

using log4net;

 log4net.ILog log = log4net.LogManager.GetLogger("Frm_Login");


 log.Info("Start Lonin From.");


等等。。