C# 利用Log4net记录日志简单实例

一、安装Log4net程序包

参考：https://www.cnblogs.com/weixiaowei/p/8253228.html

二、在项目中引用Log4net的dll文件

三、配置config文件

<log4net>
    <appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">
      <!--日志路径-->
      <param name="File" type="log4net.Util.PatternString" value="%Log\%date{yyyMMdd}.log" />
      <!--是否是向文件中追加日志-->
      <param name="AppendToFile" value="true" />
      <!--log保留天数-->
      <param name="MaxSizeRollBackups" value="10" />
      <!--日志文件名是否是固定不变的-->
      <param name="StaticLogFileName" value="false" />
      <!--日志文件名格式为:2008-08-31.log-->
      <param name="DatePattern" value="yyyy-MM-dd&quot;.log&quot;" />
      <!--日志根据日期滚动-->
      <param name="RollingStyle" value="Date" />
      <layout type="log4net.Layout.PatternLayout">
        <param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n %loggername" />
      </layout>
    </appender>
    <!-- 控制台前台显示日志 -->
    <appender name="ColoredConsoleAppender" type="log4net.Appender.ColoredConsoleAppender">
      <mapping>
        <level value="ERROR" />
        <foreColor value="Red, HighIntensity" />
      </mapping>
      <mapping>
        <level value="Info" />
        <foreColor value="Green" />
      </mapping>
      <layout type="log4net.Layout.PatternLayout">
        <conversionPattern value="%n%date{HH:mm:ss,fff} [%-5level] %m" />
      </layout>
      <filter type="log4net.Filter.LevelRangeFilter">
        <param name="LevelMin" value="Info" />
        <param name="LevelMax" value="Fatal" />
      </filter>
    </appender>
    <root>
      <!--(高) OFF > FATAL > ERROR > WARN > INFO > DEBUG > ALL (低) -->
      <level value="all" />
      <appender-ref ref="ColoredConsoleAppender" />
      <appender-ref ref="RollingLogFileAppender" />
    </root>
  </log4net>

四、后台添加

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

namespace RM.Utilities
{
    public static class LogManager
    {
        private static ILog loger = new MDLog();
        public static void Debug(string s)
        {
            loger.Debug(s);
        }

        public static void Error(string s)
        {
            loger.Error(s);
        }

        public static void Fatal(string s)
        {
            loger.Fatal(s);
        }

        public static void Info(string s)
        {
            loger.Info(s);
        }
    }

    public interface ILog
    {

        void Debug(string s);

        void Error(string s);

        void Fatal(string s);

        void Info(string s);

    }

    public class MDLog : ILog
    {
        public MDLog()
        {
            XmlConfigurator.Configure();
        }

        private log4net.ILog loger = log4net.LogManager.GetLogger("RM.RealtimeMonitoring");
        public void Debug(string s)
        {
            loger.Debug(s);
        }

        public void Error(string s)
        {
            loger.Error(s);
        }

        public void Fatal(string s)
        {
            loger.Fatal(s);
        }

        public void Info(string s)
        {
            loger.Info(s);
        }
    }
}

五、调用

LogManager.Debug(classid.ToString());

六、参考

 https://www.cnblogs.com/wangjiming/p/8600935.html