1.引用log4net.dll文件
2.添加配置文件
1<?xmlversion="1.0"?>2<configuration>3<configSections>4<!--log4net配置安装-->5<sectionname="log4net"type="log4net.Config.Log4NetConfigurationSectionHandler,log4net"/>6</configSections>7<log4net>8<!--记录器root可以被其他继承-->9<root>10<levelvalue="ALL"/>11<appender-refref="ConsoleAppender"/>12<appender-refref="FileAppender"/>13</root>14<!--记录器OtherClass这个类才有的日志级别-->15<loggername="log4netSample.OtherClass">16<levelvalue="DEBUG"/>17<appender-refref="ConsoleAppender"/>18<appender-refref="FileAppender"/>19</logger>20<!--输出到控制台-->21<appendername="ConsoleAppender"type="log4net.Appender.ConsoleAppender,log4net">22<layouttype="log4net.Layout.PatternLayout,log4net">23<paramname="ConversionPattern"value="%d [%t] %-5p %c - %m%n"/>24</layout>25</appender>2627<!--<appender name="ConsoleAppender" type="log4net.Appender.ConsoleAppender">28<layout type="log4net.Layout.PatternLayout">29<conversionPattern value="%date{ABSOLUTE}30[%thread] %level %logger - %message%newline"/>31</layout>32<filter type="log4net.Filter.StringMatchFilter">33<stringToMatch value="test" />34</filter>35<filter type="log4net.Filter.DenyAllFilter" />36</appender>-->3738<!--保存到文件-->39<appendername="FileAppender"type="log4net.Appender.FileAppender">40<filevalue="mylogfile.txt"/>41<appendToFilevalue="true"/>42<lockingModeltype="log4net.Appender.FileAppender+MinimalLock"/>43<layouttype="log4net.Layout.PatternLayout">44<conversionPatternvalue="%date [%thread] %level %logger - %message%newline"/>45</layout>46<filtertype="log4net.Filter.LevelRangeFilter">47<levelMinvalue="INFO"/>48<levelMaxvalue="FATAL"/>49</filter>50</appender>51</log4net>52<startup>53<supportedRuntimeversion="v4.0"sku=".NETFramework,Version=v4.0"/>54</startup>55</configuration>
注意，如果配置文件里面还有其他内容，比如数据库连接串之类的，都要放在log4net之后，否则会出错
3.读取配置信息
也可以在每次调用的地方
1log4net.Config.XmlConfigurator.Configure();
4.调用
1namespacelog4netSample2{3publicclassOtherClass4{5publicstaticvoidLog4NetSayHello() {6log4net.Config.XmlConfigurator.Configure();7log4net.ILog logger = log4net.LogManager.GetLogger(typeof(OtherClass));8logger.Error("这也是一个日志消息");9}10}11}
1namespacelog4netSample2{3classPRogram4{5staticvoidMain(string[] args)6{7log4net.ILog logger = log4net.LogManager.GetLogger(typeof(Program));8logger.Debug("这是一个日志消息");910OtherClass.Log4NetSayHello();11Console.ReadKey();12}13}14}