目錄1、安裝log4net插件2、配置web.config文件3、初始化log4net4、定義異常攔截器5、后臺線程輪詢異常隊列，將日志寫入到文件6、控制器中定義異常測試方法7、啟動程序測試action方法1、安裝log4net插件

新建Asp.net MVC4項目，并在Nuget控制臺輸入命令，或者直接搜索log4net在線安裝，安裝log4net

>Install-Package log4net -Version 2.0.15

2、配置web.config文件<?xml version='1.0' encoding='utf-8'?><!-- 有關如何配置 ASP.NET 應用程序的詳細信息，請訪問 https://go.microsoft.com/fwlink/?LinkId=301880 --><configuration> <configSections> <section name='log4net' type='log4net.Config.Log4NetConfigurationSectionHandler,log4net'/> </configSections> <log4net> <root> <level value='ALL'></level> <appender-ref ref='SysAppender'></appender-ref> </root> <logger name='WebLogger'> <!--日志輸出級別限制，只有大于或等于DEBUG級別才記錄日志--> <level value='DEBUG'></level> </logger> <!--以滾動日志方式記錄日志--> <appender name='SysAppender' type='log4net.Appender.RollingFileAppender,log4net'> <!--文件存放路徑，在項目根目錄App_Data下--> <param name='File' value='App_Data/'></param> <!--日志是否追加到文件--> <param name='AppendToFile' value='true'></param> <!--滾動日志文件按照日期風格生成--> <param name='RollingStyle' value='Date'></param> <!--日志文件的命名規則--> <param name='DatePattern' value='&quot;Logs_&quot;yyyyMMdd&quot;.txt&quot;'></param> <!--日志名稱是否靜態--> <param name='StaticLogFileName' value='false'></param> <!--日志內容的格式和布局--> <layout type='log4net.Layout.PatternLayout,log4net'><param name='ConversionPattern' value='%d [%t] %-5p %c - %m%n'></param><param name='Header' value='-------------------------header---------------------------'></param><param name='Footer' value='-------------------------footer---------------------------'></param> </layout> </appender> <!--按照控制臺輸出日志--> <appender name='ConsoleApp' type='log4net.Appender.ConsoleAppender,log4net'> <layout type='log4net.Layout.PatternLayout,log4net'><param name='ConversionPattern' value='%d [%t] %-5p %c - %m%n'></param> </layout> </appender> </log4net> <appSettings> <add key='webpages:Version' value='3.0.0.0' /> <add key='webpages:Enabled' value='false' /> <add key='ClientValidationEnabled' value='true' /> <add key='UnobtrusiveJavaScriptEnabled' value='true' /> </appSettings> <system.web> <compilation debug='true' targetFramework='4.6.1' /> <httpRuntime targetFramework='4.6.1' /> <httpModules> <add name='ApplicationInsightsWebTracking' type='Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web' /> </httpModules> </system.web> <runtime> <assemblyBinding xmlns='urn:schemas-microsoft-com:asm.v1'> <dependentAssembly><assemblyIdentity name='Antlr3.Runtime' publicKeyToken='eb42632606e9261f' /><bindingRedirect oldVersion='0.0.0.0-3.5.0.2' newVersion='3.5.0.2' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='System.Diagnostics.DiagnosticSource' publicKeyToken='cc7b13ffcd2ddd51' /><bindingRedirect oldVersion='0.0.0.0-4.0.2.1' newVersion='4.0.2.1' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='Newtonsoft.Json' publicKeyToken='30ad4fe6b2a6aeed' /><bindingRedirect oldVersion='0.0.0.0-11.0.0.0' newVersion='11.0.0.0' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='System.Web.Optimization' publicKeyToken='31bf3856ad364e35' /><bindingRedirect oldVersion='1.0.0.0-1.1.0.0' newVersion='1.1.0.0' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='WebGrease' publicKeyToken='31bf3856ad364e35' /><bindingRedirect oldVersion='0.0.0.0-1.6.5135.21930' newVersion='1.6.5135.21930' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='System.Web.Helpers' publicKeyToken='31bf3856ad364e35' /><bindingRedirect oldVersion='1.0.0.0-3.0.0.0' newVersion='3.0.0.0' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='System.Web.WebPages' publicKeyToken='31bf3856ad364e35' /><bindingRedirect oldVersion='1.0.0.0-3.0.0.0' newVersion='3.0.0.0' /> </dependentAssembly> <dependentAssembly><assemblyIdentity name='System.Web.Mvc' publicKeyToken='31bf3856ad364e35' /><bindingRedirect oldVersion='1.0.0.0-5.2.4.0' newVersion='5.2.4.0' /> </dependentAssembly> </assemblyBinding> </runtime> <system.webServer> <modules> <remove name='TelemetryCorrelationHttpModule' /> <add name='TelemetryCorrelationHttpModule' type='Microsoft.AspNet.TelemetryCorrelation.TelemetryCorrelationHttpModule, Microsoft.AspNet.TelemetryCorrelation' preCondition='integratedMode,managedHandler' /> <remove name='ApplicationInsightsWebTracking' /> <add name='ApplicationInsightsWebTracking' type='Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web' preCondition='managedHandler' /> </modules> <validation validateIntegratedModeConfiguration='false' /> </system.webServer> <system.codedom> <compilers> <compiler language='c#;cs;csharp' extension='.cs' type='Microsoft.CodeDom.Providers.DotNetCompilerPlatform.CSharpCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' warningLevel='4' compilerOptions='/langversion:default /nowarn:1659;1699;1701' /> <compiler language='vb;vbs;visualbasic;vbscript' extension='.vb' type='Microsoft.CodeDom.Providers.DotNetCompilerPlatform.VBCodeProvider, Microsoft.CodeDom.Providers.DotNetCompilerPlatform, Version=2.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' warningLevel='4' compilerOptions='/langversion:default /nowarn:41008 /define:_MYTYPE=\&quot;Web\&quot; /optionInfer+' /> </compilers> </system.codedom></configuration>

日志級別分類（從高到低）：OFF、FATAL、ERROR、WARN、INFO、DEBUG、ALL

3、初始化log4net

在Global.asax中初始化log4net配置

log4net.Config.XmlConfigurator.Configure();

4、定義異常攔截器

自定義異常攔截器，出現控制器action方法調用出現異常時，將異常信息統一加入到全局隊列中，避免日志寫入文件并發沖突。

public class MyErrorAttribute:HandleErrorAttribute {public static Queue<Exception> ExceptionQueue = new Queue<Exception>();public override void OnException(ExceptionContext filterContext){ ExceptionQueue.Enqueue(filterContext.Exception); base.OnException(filterContext);} }

將全局默認異常處理器替換為自己定義的。

public class FilterConfig {public static void RegisterGlobalFilters(GlobalFilterCollection filters){ //filters.Add(new HandleErrorAttribute());//默認異常處理器 filters.Add(new MyErrorAttribute());//自定義異常處理器} }5、后臺線程輪詢異常隊列，將日志寫入到文件

啟動類Global.asax.cs文件中定義后臺線程，處理異常隊列中日志的輸出

//啟動后臺線程，周期性輪詢異常隊列，將異常輸出到文件 ThreadPool.QueueUserWorkItem(o => {while(true){ if(MyErrorAttribute.ExceptionQueue.Count>0) {Exception ex = MyErrorAttribute.ExceptionQueue.Dequeue();if(ex!=null){ ILog log = LogManager.GetLogger('testError'); log.Error(ex.ToString());}else{ Thread.Sleep(50);} } else {Thread.Sleep(50); }} });6、控制器中定義異常測試方法public ActionResult TestLog(){ int result = 0; int x = 1, y = 0; result = x / y; return View();}7、啟動程序測試action方法

查看項目根目錄App_Data，生成了日志文件Logs_20230520.txt

查看日志內容

到此這篇關于log4net在Asp.net MVC4中的使用的文章就介紹到這了,更多相關Asp.net MVC4使用log4net內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！