Log4net的使用

1、NuGet上下载log4net

2、App.config中添加配置信息

<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
  <log4net>
    <!-- OFF, FATAL, ERROR, WARN, INFO, DEBUG, ALL -->
    <!-- Set root logger level to ERROR and its appenders -->
    <root>
      <level value="ALL" />
      <appender-ref ref="SysAppender" />
    </root>
    <!-- Print only messages of level DEBUG or above in the packages -->
    <logger name="TestLogger">
      <level value="ALL" />
    </logger>
    <appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net">
      <!-- 日志目录 -->
      <param name="File" value="Log/" />
      <param name="AppendToFile" value="true" />
      <param name="RollingStyle" value="Date" />
      <!-- 日志命名 -->
      <param name="DatePattern" value="&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;" />
      <param name="StaticLogFileName" value="false" />
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>
    <appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net">
      <layout type="log4net.Layout.PatternLayout,log4net">
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" />
      </layout>
    </appender>
  </log4net>

3.在AssemblyInfo.cs中 或 日志类namespace上方添加如下代码

//log4net从配置文件中读取配置
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "config", Watch = true)]

(指定配置文件方法)

//添加log4net信息
[assembly: log4net.Config.DOMConfigurator(ConfigFile = "Log.config", Watch = true)]

4.使用log4net

        private static ILog log = LogManager.GetLogger("TestLogger");
        static void Main(string[] args)
        {
            log.Debug("Debug日志");
            log.Info("Info日志");
            log.Warn("Warn日志");
            log.Error("Error日志");
        }

 5.MVC项目使用

把上文中<section />节点放到<configSections></configSections>节点下；<log4net> 节点放在根节点下；在Global 文件中添加 log4net.Config.XmlConfigurator.Configure();