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
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<? 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
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//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。
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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(); } |
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原文链接:https://www.jianshu.com/p/2e435924eecd