C# log4net使用案例详解

这篇文章主要介绍了C# log4net使用案例详解,本篇文章通过简要的案例,讲解了该项技术的了解与使用,以下就是详细内容,需要的朋友可以参考下

这边先介绍简单的使用：在控制台输出和写入文件

首先添加log4net的nuget包

然后在app.config中添加配置项==configSections只能有一个，且是configuration的首个节点

				?

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

									<configuration>

									  <configSections>

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

									  </configSections>

									  <startup>

									    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />

									  </startup>

									  <log4net>

									    <root>

									      <level value="WARN" />

									      <appender-ref ref="LogFileAppender" />

									      <appender-ref ref="ConsoleAppender" />

									    </root>

									    <logger name="testApp.Logging">

									      <level value="DEBUG"/>

									    </logger>

									    <appender name="LogFileAppender" type="log4net.Appender.FileAppender" >

									      <param name="File" value="log_file.txt" />

									      <!--<param name="File" value="D:/log_file.txt" />-->

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

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

									        <!--<param name="Header" value="[Header] "/>

									        <param name="Footer" value="[Footer] "/>-->

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

									      </layout>

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

									        <param name="LevelMin" value="DEBUG" />

									        <param name="LevelMax" value="WARN" />

									      </filter>

									    </appender>

									    <appender name="ConsoleAppender"  type="log4net.Appender.ConsoleAppender" >

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

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

									      </layout>

									    </appender>

									  </log4net>

									</configuration>

这部分代码也可以单独放在一个配置文件中，起名log4net.config,我们把这个文件和app.config放在同一层

接着在AssemblyInfo.cs下添加特性

				?

									//配置文件在app.config中

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

									//配置文件在log4net.config中

									//[assembly: log4net.Config.XmlConfigurator(ConfigFile="log4net.config", Watch = true)]

Watch=true监视配置文件，当配置文件发生变化的时候，就会重新加载。

				?

									static void Main(string[] args)

									{

									    log4net.ILog log = log4net.LogManager.GetLogger("testApp.Logging");//获取一个日志记录器

									    //配置文件在app.config中

									    log4net.Config.XmlConfigurator.Configure();

									    //配置文件在log4net.config中

									    //string assemblyFilePath = Assembly.GetExecutingAssembly().Location;

									    //string assemblyDirPath = Path.GetDirectoryName(assemblyFilePath);

									    //DirectoryInfo pathInfo = new DirectoryInfo(assemblyDirPath);

									    //string configFilePath = pathInfo.Parent.Parent.FullName + "//log4net.config";

									    //log4net.Config.XmlConfigurator.ConfigureAndWatch(new FileInfo(configFilePath));

									    //绝对路径

									    //log4net.Config.XmlConfigurator.Configure(newSystem.IO.FileInfo(@"E:/DEMO/Log4NetDemo/emoTest/log4net.config"));

									    Thread.CurrentThread.Name = "main";

									    log.Debug("初始化连接开始");

									    log.Warn("测试");

									    log.Info(DateTime.Now.ToString() + ": login success");

									    Console.ReadKey();

									}