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

  2 <configuration>

  3

  4   <configSections>

  5     <section name="log4net" type="System.Configuration.IgnoreSectionHandler" />

  6   </configSections>

  7

  8   <log4net debug="false">

  9     <root>

 10       <level value="ALL"/>

 11       <appender-ref ref="UserLogAppender"/>

 12       <appender-ref ref="SystemLogAppender"/>

 13     </root>

 14     <!--信息日志-->

 15     <appender name="UserLogAppender" type="log4net.Appender.RollingFileAppender,log4net">

 16       <!--日志路径-->

 17       <file value="./Log/"/>

 18       <!--日志名格式：20151113_user.log-->

 19       <param name="DatePattern" value="yyyyMMdd&quot;_user.log&quot;"/>

 20       <!--是否是向文件中追加日志-->

 21       <param name="AppendToFile" value="true"/>

 22       <!--log保留天数-->

 23       <param name="MaxSizeRollBackups" value="10"/>

 24       <!--log最大文件大小-->

 25       <param name="MaximumFileSize" value="5MB"/>

 26       <!--日志文件名是否固定不变的-->

 27       <param name="StaticLogFileName" value="false"/>

 28       <!--日志根据XX滚动-->

 29       <param name="RollingStyle" value="Composite"/>

 30       <!--布局-->

 31       <layout type="log4net.Layout.PatternLayout,log4net">

 32         <param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n"/>

 33         <param name="Header" value=""/>

 34       </layout>

 35       <filter type="log4net.Filter.LevelRangeFilter">

 36         <param name="LevelMin" value="INFO"/>

 37         <param name="LevelMax" value="INFO"/>

 38       </filter>

 39     </appender>

 40     <!--警告,注意,通知,错误日志-->

 41     <appender name="SystemLogAppender" type="log4net.Appender.RollingFileAppender,log4net">

 42       <file value="./Log/"/>

 43       <param name="File" value="Log\log_sys.log" />

 44       <param name="DatePattern" value="yyyyMMdd&quot;_sys.log&quot;"/>

 45       <param name="AppendToFile" value="true"/>

 46       <param name="RollingStyle" value="Composite"/>

 47       <param name="MaxSizeRollBackups" value="10"/>

 48       <param name="MaximumFileSize" value="5MB"/>

 49       <param name="StaticLogFileName" value="false"/>

 50       <layout type="log4net.Layout.PatternLayout,log4net">

 51         <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss}%newline%message%n"/>

 52         <param name="Header" value=""/>

 53       </layout>

 54       <filter type="log4net.Filter.LevelRangeFilter">

 55         <param name="LevelMin" value="ERROR"/>

 56         <param name="LevelMax" value="ErrOR"/>

 57       </filter>

 58     </appender>

 59   </log4net>

 60

 61 </configuration>

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

namespace Demo.Log4Net

{

    class Program

    {

        static void Main(string[] args)

        {

            ILog log = LogManager.GetLogger(typeof(LogHelper));

            log.Info("info");

            log.Error("error");

            Console.ReadKey();

        }

    }

}