查看了一些关于mvc异常日志记录的文章，发现使用redis+log4net的最多，这里简单总结了使用这种方式实现日志记录的过程。直接上步骤：
第一步：配置redis服务器
参考redis的配置和在.net中的使用
第二步：添加自己的异常过滤器(Models文件夹添加一个MyExceptionAttribute类)
1 ?public class MyExceptionAttribute : HandleErrorAttribute 2 ????{ 3 ????????//----所有用户出现异常，向同一个静态队列添加数据 4 ????????//public static Queue<Exception> exQueue = new Queue<Exception>();//不用redis时，用一个普通的队列保存异常 5 ?6 ????????//----使用redis队列保存异常 7 ????????//获取redis的client实例 8 ????????public static IRedisClientsManager clientManager = new PooledRedisClientManager(new string[] { "127.0.0.1:6379", "10.122.0.1" }); 9 ????????public static IRedisClient redisClient = clientManager.GetClient();10 11 ????????//AOP方式 在出现异常时把异常信息记入到redis队列中12 ????????public override void OnException(ExceptionContext filterContext)13 ????????{14 ????????????base.OnException(filterContext);15 ????????????Exception ex = filterContext.Exception;16 ????????????//普通队列记录：exQueue.Enqueue(ex);17 ????????????redisClient.EnqueueItemOnList("excpList", ex.ToString());//异常记入到redis队列18 19 ????????????//指定filterContext.Result不会执行后续Action中代码（下边给了两种提示用户出错的方式） ?????????20 ????????????//filterContext.Result = new ContentResult() { Content = "<script>alert(‘出错了！‘)</script>" };//弹出框提示21 ????????????filterContext.Result = new RedirectResult("/error.html");//跳转到错误页22 23 ????????????filterContext.ExceptionHandled = true;//告诉服务器异常已处理，可以执行result了！
//不加这句服务器会继续进行异常的处理,没有为异常配置错误页时跳转到错误黄页（使用这种方法一般不需要在config文件中配置错误页，因为不进入内置的异常处理程序）24 ????????}25 ????}第三步：设置全局过滤器。也可以对指定Controller或Action添加特性标签，在记录异常时最好配置为全局过滤器
public class FilterConfig ???{ ???????public static void RegisterGlobalFilters(GlobalFilterCollection filters) ???????{ ???????????//把自定义异常处理过滤器设为全局 ???????????filters.Add(new MyExceptionAttribute()); ???????} ???}第四步：配置global文件
1 ?protected void Application_Start() 2 ????????{ 3 ????????????log4net.Config.XmlConfigurator.Configure();//获取Log4Net配置信息(配置信息定义在Web.config文件中) 4 ????????????AreaRegistration.RegisterAllAreas(); 5 ????????????FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters); 6 ????????????RouteConfig.RegisterRoutes(RouteTable.Routes); 7 ????????????BundleConfig.RegisterBundles(BundleTable.Bundles); 8 ????????????//通过线程不停的从队列获取异常信息 9 ????????????ThreadPool.QueueUserWorkItem(x =>10 ????????????{11 ????????????????while (true)12 ????????????????{13 ????????????????????try14 ????????????????????{15 ????????????????????????if (MyExceptionAttribute.redisClient.GetListCount("excpList") > 0)16 ????????????????????????{17 ????????????????????????????// ?Exception ?ex= MyExecptionAttribute.ExceptionQueue.Dequeue();//从队列中拿出数据18 ????????????????????????????string errorMsg = MyExceptionAttribute.redisClient.DequeueItemFromList("excpList");//从Redis队列中取出异常数据19 ????????????????????????????if (!string.IsNullOrEmpty(errorMsg))20 ????????????????????????????{21 ????????????????????????????????//将异常信息写到Log4Net中.22 ????????????????????????????????ILog logger = LogManager.GetLogger("ErrorLog");23 ????????????????????????????????logger.Error(errorMsg);24 ????????????????????????????}25 ????????????????????????????else26 ????????????????????????????{27 ????????????????????????????????Thread.Sleep(1000);28 ????????????????????????????}29 ????????????????????????}30 ????????????????????????else31 ????????????????????????{32 ????????????????????????????Thread.Sleep(1000);//设置记录间隔1秒33 ????????????????????????}34 ????????????????????}35 ????????????????????catch (Exception ex)36 ????????????????????{37 ????????????????????????//记录出现异常也写入redis异常队列中38 ????????????????????????MyExceptionAttribute.redisClient.EnqueueItemOnList("excpList", ex.ToString());39 ????????????????????}40 ????????????????}41 ????????????});//callback--end42 ????????}//--线程end下边是log4net的配置信息(来源：https://blog.csdn.net/zhulongxi/article/details/73550076)
<configuration> ?<configSections> ???<section name="log4net" type="log4net.Config.Log4NetConfigurationSectionHandler, log4net"/> ?</configSections> ???<log4net> ???<root> ?????<level value="ALL"/> ?????<appender-ref ref="SysAppender"/> ???</root> ???<!-- Print only messages of level DEBUG or above in the packages --> ???<logger name="WebLogger"> ?????<level value="DEBUG"/> ???</logger> ???<appender name="SysAppender" type="log4net.Appender.RollingFileAppender,log4net" > ?????<param name="File" value="App_Data/" /> ?????<!--日志文件位置--> ?????<param name="AppendToFile" value="true" /> ?????<!--文件追加--> ?????<param name="RollingStyle" value="Date" /> ?????<!--回滚：按照日期--> ?????<param name="DatePattern" value=""Logs_"yyyyMMdd".txt"" /> ?????<!--文件名--> ?????<param name="StaticLogFileName" value="false" /> ?????<!--文件名为非静态--> ?????<layout type="log4net.Layout.PatternLayout,log4net"> ???????<!--信息格式--> ???????<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" /> ???????<param name="Header" value=" ----------------------header-------------------------- " /> ???????<param name="Footer" value=" ----------------------footer-------------------------- " /> ?????</layout> ???</appender> ???<appender name="consoleApp" type="log4net.Appender.ConsoleAppender,log4net"> ?????<layout type="log4net.Layout.PatternLayout,log4net"> ???????<param name="ConversionPattern" value="%d [%t] %-5p %c - %m%n" /> ?????</layout> ???</appender> ?</log4net></configuration>
通过以上4个步骤就可以完成redis队列+log4net异常记录的实现，日志文件存储在App_Data目录下。
参考文章：
1、https://blog.csdn.net/wziyx513225244/article/details/6628627
2、https://blog.csdn.net/zhulongxi/article/details/73550076
redis队列结合log4net实现异常日志记录
原文地址：https://www.cnblogs.com/wyy1234/p/9050346.html