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：