1.Nuget下载Log4Net包
2.设置应用程序配置文件App.config
<?xml version="1.0" encoding="utf-8" ?><configuration> ????<configSections> ???????<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net" /> ???</configSections> ?<log4net> ???<root> ?????<level value="ALL" /> ?????<appender-ref ref="RollingLogFileAppender" /> ?????<appender-ref ref="InfoRollingFileAppender" /> ?????<appender-ref ref="WarnRollingFileAppender" /> ?????<appender-ref ref="ErrorRollingFileAppender" /> ???</root> ???<!--log--> ???<appender name="RollingLogFileAppender" type="log4net.Appender.RollingFileAppender"> ?????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> ?????<param name="File" value="D:\Log\"/> ?????<param name="AppendToFile" value="true"/> ?????<param name="StaticLogFileName" value="false"/> ?????<param name="DatePattern" value="yyyyMMdd/‘Log_‘yyyyMMdd".log""/> ?????<param name="RollingStyle" value="Date"/> ?????<layout type="log4net.Layout.PatternLayout"> ???????<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] - %m%n"/> ?????</layout> ???</appender> ???<!--Info--> ???<appender name="InfoRollingFileAppender" type="log4net.Appender.RollingFileAppender"> ?????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> ?????<param name="File" value="D:\Log\" /> ?????<param name="AppendToFile" value="true" /> ?????<param name="RollingStyle" value="Date" /> ?????<param name="DatePattern" value="yyyyMMdd/‘LogInfo_‘yyyyMMdd".log"" /> ?????<param name="StaticLogFileName" value="false"/> ?????<layout type="log4net.Layout.PatternLayout"> ???????<param name="ConversionPattern" value="%d [%t] 【%-5p】 %c [%x]:[line%line]- %m%n"/> ??????<!--conversionPattern value="%date;%file;行号:%line;线程ID:[%thread];%message %newline" /> --> ?????</layout> ?????<filter type="log4net.Filter.LevelRangeFilter"> ???????<param name="LevelMin" value="INFO" /> ???????<param name="LevelMax" value="INFO" /> ?????</filter> ???</appender> ???<!--WARN--> ???<appender name="WarnRollingFileAppender" type="log4net.Appender.RollingFileAppender"> ?????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> ?????<param name="File" value="D:\Log\" /> ?????<param name="AppendToFile" value="true" /> ?????<param name="RollingStyle" value="Date" /> ?????<param name="DatePattern" value="yyyyMMdd/‘LogWarn_‘yyyyMMdd".log"" /> ?????<param name="StaticLogFileName" value="false"/> ?????<layout type="log4net.Layout.PatternLayout"> ???????<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] ?- %m%n"/> ?????</layout> ?????<filter type="log4net.Filter.LevelRangeFilter"> ???????<param name="LevelMin" value="WARN" /> ???????<param name="LevelMax" value="WARN" /> ?????</filter> ???</appender> ???<!--ERROR--> ???<appender name="ErrorRollingFileAppender" type="log4net.Appender.RollingFileAppender"> ?????<lockingModel type="log4net.Appender.FileAppender+MinimalLock" /> ?????<param name="File" value="D:\Log\" /> ?????<param name="AppendToFile" value="true" /> ?????<param name="RollingStyle" value="Date" /> ?????<param name="DatePattern" value="yyyyMMdd/‘LogError_‘yyyyMMdd".log"" /> ?????<param name="StaticLogFileName" value="false"/> ?????<layout type="log4net.Layout.PatternLayout"> ???????<param name="ConversionPattern" value="%d [%t] %-5p %c [%x] ?- %m%n"/> ?????</layout> ?????<filter type="log4net.Filter.LevelRangeFilter"> ???????<param name="LevelMin" value="ERROR" /> ???????<param name="LevelMax" value="ERROR" /> ?????</filter> ???</appender> ?</log4net> <startup> ????????<supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" /> </startup></configuration>
3.AssemblyInfo.cs文件中添加
[assembly: log4net.Config.XmlConfigurator(ConfigFileExtension = "config", Watch = true)]
4.创建日志记录组件
public static ILog mLog = log4net.LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
mLog.Debug("this is a debug");
mLog.Info("this is info");
mLog.Error("it is error");
参考文章
Log4Net日志组件
原文地址：https://www.cnblogs.com/larry-xia/p/8969581.html