log4net

log4net

1.在Web.config配置文件中，给configuration添加第一个第二个子节点如下：

  <configSections>
    <!--日志配置-->
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler,log4net" />
  </configSections>
  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="App_Data/Log/" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="10" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyy-MM-dd'.txt'" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss:fff} [%thread] %-5level %logger %ndc - %message%newline" />
      </layout>
    </appender>
    <appender name="ErrorLogAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="App_Data/Log/" />
      <param name="AppendToFile" value="true" />
      <param name="MaxSizeRollBackups" value="10" />
      <param name="StaticLogFileName" value="false" />
      <param name="DatePattern" value="yyyy-MM-dd'-error.txt'" />
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <!--输出格式-->
        <param name="ConversionPattern" value="%date 线程ID:[%thread] 日志级别：%-5level 出错类：%logger property:[%property{NDC}] - 错误描述：%message%newline" />
      </layout>
    </appender>
    <!--<appender name="LogFileAppender" type="log4net.Appender.FileAppender">
      <param name="File" value="App_Data/Log/log.txt" />
      <param name="AppendToFile" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="Header" value="[Header] " />
        <param name="Footer" value="[Footer] " />
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x]  - %m%n" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="DEBUG" />
        <param name="LevelMax" value="WARN" />
      </filter>
    </appender>
    <appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n" />
      </layout>
    </appender>-->
    <root>
    </root>
    <logger additivity="true" name="InfoLog">
      <level value="INFO" />
      <appender-ref ref="RollingLogFileAppender" />
    </logger>
    <logger additivity="true" name="ErrorLog">
      <level value="ERROR" />
      <appender-ref ref="ErrorLogAppender" />
    </logger>

  </log4net>

log4net节点的另一配置方法

<log4net>
    <appender name="LogFileAppender" type="log4net.Appender.FileAppender">
      <param name="File" value="App_Data/Log/info.txt" />
      <param name="AppendToFile" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss:fff} [%thread] %-5level %logger %ndc - %message%newline" />
      </layout>
    </appender>
    <appender name="ErrorLogAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="App_Data/Log/error.txt" />
      <param name="AppendToFile" value="true" />
      <layout type="log4net.Layout.PatternLayout">
        <!--输出格式-->
        <param name="ConversionPattern" value="%date 线程ID:[%thread] 日志级别：%-5level 出错类：%logger property:[%property{NDC}] - 错误描述：%message%newline" />
      </layout>
    </appender>
    <root>
    </root>
    <logger additivity="true" name="InfoLog">
      <level value="INFO" />
      <appender-ref ref="LogFileAppender" />
    </logger>
    <logger additivity="true" name="ErrorLog">
      <level value="ERROR" />
      <appender-ref ref="ErrorLogAppender" />
    </logger>
  </log4net>

2.新增Logger类

 public static class Logger
    {
        private static ILog InfoLog= log4net.LogManager.GetLogger("InfoLog");//获取一个日志记录器
        private static ILog ErrorLog = log4net.LogManager.GetLogger("ErrorLog");//获取一个日志记录器
        public static void Info(string message)
        {            
            InfoLog.Info(message);
        }
        public static void Error( string error)
        {
            ErrorLog.Error(error);
        }
        public static void Error(Exception ex, string error)
        {
            ErrorLog.Error(error,ex);
        }
        public static void Warn(string message)
        {            
            InfoLog.Warn(message);
        }
    }

3.在Global.asax.cs的Application_Start方法中调用 log4net.Config.XmlConfigurator.Configure();

4.调用示例

Logger.Info("提示信息");
Logger.Error("错误信息");

5.效果

 注：

文件名累加的解决方法：

在appender节点里添加：

<!--最小锁定模型以允许多个进程可以写入同一个文件-->

<param name="lockingModel"  type="log4net.Appender.FileAppender+MinimalLock" />