Log4net 控制台打印日志（二）

1.创建控制台程序

2.用NuGet添加log4net引用

3.添加应用程序配置文件:App.config

4.添加配置信息：

 <?xml version="1.0" encoding="utf-8" ?>
 <configuration>
   <configSections>
     <!--添加配置节点-->
     <section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" />
   </configSections>

   <log4net>
     <!--日志保存到文件里面 txt-->
     <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
       <mapping>
         <level value="ERROR" />
         <foreColor value="White" />
         <backColor value="Red,HighIntensity" />
       </mapping>

       <mapping>
         <level value="DEBUG" />
         <backColor value="Green" />
       </mapping>

       <mapping>
         <level value="Info" />
         <backColor value="Yellow" />
       </mapping>

       <layout type="log4net.Layout.PatternLayout">
         <conversionPattern value="%date [%thread] %-5level %logger [%property{NDC}] - %message%newline" />
       </layout>

       <filter type="log4net.Filter.LevelRangeFilter">
         <param name="LevelMin" value="Debug"/>
         <param name="LevelMax" value="Fatal"/>
       </filter>

     </appender>
     <root>
       <!--配置可输出日志级别-->
       <level value="all"/>
       <!--应用配置-->
       <appender-ref ref="ColoredConsoleAppender"/>
     </root>
   </log4net>

 </configuration>

5.程序中代码：

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using log4net;

 namespace 控制台输出日志
 {
     class Program
     {

         static void Main(string[] args)
         {
             //初始化log4net配置
             log4net.Config.XmlConfigurator.Configure();
             ILog log = LogManager.GetLogger(typeof(Program));
             log.Info("普通日志");
             log.Error("错误日志");
             log.Debug("异常信息");
             log.Fatal("致命错误");
             log.Warn("警告信息");

             Console.ReadKey();
         }
     }
 }

6.展示：