log4net 课一

第一步：Log4net的安装

Install-Package log4net

第二步：Log4net的配置

log4net.config

注意：将log4net.config的属性“复制到输出目录”设置为“始终复制”

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

<configuration>

<configSections>

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

</configSections>

<log4net>

<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender">

<!--日志路径-->

<param name= "File" value= "D:\App_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".log""/>

<!--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>

</configuration>

第三步：调用

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.IO;

using log4net;

using log4net.Config;

namespace Log4net

{

class Program

{

static void Main(string[] args)

{

InitLog4Net();

var logger = LogManager.GetLogger(typeof(Program));

logger.Info("消息");

logger.Warn("警告");

logger.Error("异常");

logger.Fatal("错误");

Console.ReadLine();

}

private static void InitLog4Net()

{

var logCfg = new FileInfo(AppDomain.CurrentDomain.BaseDirectory + "log4net.config");

XmlConfigurator.ConfigureAndWatch(logCfg);

}

}

}