log4net 日志不能输出

查找原因是因为 loginfo.IsInfoEnabled、loginfo.IsErrorEnabled等一直为false

如果是自己配置的log4net.config文件 

需要在调用log4net记录日志的项目的AssemblyInfo.cs文件中添加

[assembly: log4net.Config.DOMConfigurator(ConfigFileExtension = "log4net.config", Watch = true)]

语句

如果是在app.config或者Web.config配置的log4net

需要在调用log4net记录日志的项目的AssemblyInfo.cs文件中添加

[assembly: log4net.Config.XmlConfigurator(Watch = true)]

语句

app.config或者Web.config配置的log4net 加入log4net 设置

  <configSections>
    <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/>
  </configSections>

log4net配置

  <!--配置Log4net-->
  <log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <param name="File" value="Logs"/>
      <!--对于RollingFileAppender,lockingModel不起作用-->
      <!--<param name="lockingModel" value="log4net.Appender.FileAppender+MinimalLock"/>-->
      <param name="AppendToFile" value="true"/>
      <param name="MaxSizeRollBackups" value="3"/>
      <param name="StaticLogFileName" value="false"/>
      <param name="DatePattern" value="yyyyMMdd'.log'"/>
      <param name="RollingStyle" value="Date"/>
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%n时间：%d 消息:%m %n "/>
      </layout>
    </appender>
    <root>
      <level value="INFO"/>
      <appender-ref ref="RollingLogFileAppender"/>
    </root>
  </log4net>