asp.net _使用log4net记录日志

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1.下载log4net
http://logging.apache.org/log4net/download_log4net.cgi

2.解压，找到对应的net版本

3.添加引用

3.在Web项目根目录下创建log4net.config配置文件。
通过添加–新建项

4.配置文件log4new.config XML代码如下：

<?xml version="1.0" encoding="utf-8"?>
<configuration>

    <system.web>
      <compilation debug="true" targetFramework="4.5.2" />
      <httpRuntime targetFramework="4.5.2" />
    </system.web>

  <configSections>
    <!--添加配置节点-->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  </configSections>

  <log4net>

    <!--Info 日志-->
    <appender name="InfoAppender" type="log4net.Appender.RollingFileAppender">
      <file value="App_Data\\Logs\\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy-MM-dd\\'info.log'" />
      <staticLogFileName value="false" />
      <param name="MaxSizeRollBackups" value="100"/>
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <param name="Encoding" value="utf-8" />
      <maximumFileSize value="5MB"/>
      <param name="PreserveLogFileNameExtension" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%newline %nDATE:   %date %nTHREAD: [%thread] %n%message %newline %n" />
      </layout>
    </appender>

    <!--Debug 日志-->
    <appender name="DebugAppender" type="log4net.Appender.RollingFileAppender">
      <file value="App_Data\\Logs\\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy-MM-dd\\'debug.log'" />
      <staticLogFileName value="false" />
      <param name="MaxSizeRollBackups" value="100" />
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <param name="Encoding" value="utf-8" />
      <maximumFileSize value="5MB"/>
      <param name="PreserveLogFileNameExtension" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%newline %nDATE:   %date %nTHREAD: [%thread] %n%message %newline %n" />
      </layout>
    </appender>

    <!--Warn 日志-->
    <appender name="WarnAppender" type="log4net.Appender.RollingFileAppender">
      <file value="App_Data\\Logs\\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy-MM-dd\\'warn.log'" />
      <staticLogFileName value="false" />
      <param name="MaxSizeRollBackups" value="100" />
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <param name="Encoding" value="utf-8" />
      <maximumFileSize value="5MB"/>
      <param name="PreserveLogFileNameExtension" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%newline %nDATE:   %date %nTHREAD: [%thread] %n%message %newline %n" />
      </layout>
    </appender>

    <!--Error 日志-->
    <appender name="ErrorAppender" type="log4net.Appender.RollingFileAppender">
      <file value="App_Data\\Logs\\" />
      <appendToFile value="true" />
      <rollingStyle value="Composite" />
      <datePattern value="yyyy-MM-dd\\'error.log'" />
      <staticLogFileName value="false" />
      <param name="MaxSizeRollBackups" value="100" />
      <lockingModel type="log4net.Appender.FileAppender+MinimalLock" />
      <param name="Encoding" value="utf-8" />
      <maximumFileSize value="5MB"/>
      <param name="PreserveLogFileNameExtension" value="true"/>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%newline %nDATE:   %date %nTHREAD: [%thread] level: %-5level %n%message %newline %n" />
      </layout>
    </appender>

    <logger name="logerror">
      <level value="ERROR" />
      <appender-ref ref="ErrorAppender" />
    </logger>
    <logger name="logwarn">
      <level value="WARN" />
      <appender-ref ref="WarnAppender" />
    </logger>
    <logger name="loginfo">
      <level value="INFO" />
      <appender-ref ref="InfoAppender" />
    </logger>
    <logger name="logdebug">
      <level value="DEBUG" />
      <appender-ref ref="DebugAppender" />
    </logger>
    <logger name="logmonitor">
      <level value="Monitor" />
      <appender-ref ref="MonitorAppender" />
    </logger>
    <logger name="logsocketsend">
      <level value="INFO" />
      <appender-ref ref="SocketSendAppender" />
    </logger>
    <logger name="logsocketrec">
      <level value="INFO" />
      <appender-ref ref="SocketRecAppender" />
    </logger>
    <logger name="logweather">
      <level value="INFO" />
      <appender-ref ref="WeatherAppender" />
    </logger>
    <logger name="logcheckin">
      <level value="INFO" />
      <appender-ref ref="CheckInAppender" />
    </logger>
  </log4net>
</configuration>

5.初始化时设置自动加载配置log4Net

 public class WebApiApplication : System.Web.HttpApplication
    {
        protected void Application_Start()
        {
            log4net.Config.XmlConfigurator.ConfigureAndWatch(new FileInfo(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "log4net.config")));
         
        }
    }

6.使用log:

 private static readonly ILog loginfo = LogManager.GetLogger("loginfo");
  loginfo.Info("from server log test");