Use the queue to record error logs and queue error logs

Use the queue to record error logs and queue error logs

Logs are for programmers.

Procedure:

1. Create a WebApplication

2. [Create a class MyExceptionAttribute. cs in the Model folder]

1 using System; 2 using System. collections. generic; 3 using System. linq; 4 using System. web; 5 using System. web. mvc; 6 7 namespace WebApp. models 8 {9 // inherit HandleErrorAttribute in/App_Start/FilterConfig. 10 public class MyExceptionAttribute added to cs: handleErrorAttribute11 {12 // create a Queue. All static exceptions are handled in the same Queue. 13 public static Queue <Exception> ExceptionQueue = new Queue <Exception> (); 14 public override void OnException (ExceptionContext filterContext) 15 {16 base. onException (filterContext); 17 Exception ex = filterContext. exception; 18 // 19 ExceptionQueue written to the queue. enqueue (ex); 20 // jump to error page 21 filterContext. httpContext. response. redirect ("/error.html"); 22} 23} 24}

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2.1. Let MyExceptionAttribute inherit HandleErrorAttribute and override the OnException method.

2.2 create a static queue so that all error logs are in the same queue

Public static Queue <Exception> ExceptionQueue = new Queue <Exception> ();

3. Mark MyExceptionAttribute in FilterConfig. cs (/App_Start/FilterConfig. cs ).

 1 using System.Web; 2 using System.Web.Mvc; 3 using WebApp.Models; 4  5 namespace WebApp 6 { 7     public class FilterConfig 8     { 9         public static void RegisterGlobalFilters(GlobalFilterCollection filters)10         {11             //filters.Add(new HandleErrorAttribute());12             filters.Add(new MyExceptionAttribute());13         }14     }15 }

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4. Enable the thread in Global. asax and write the error logs in the queue to the txt file.

1 using System; 2 using System. collections. generic; 3 using System. IO; 4 using System. linq; 5 using System. threading; 6 using System. web; 7 using System. web. mvc; 8 using System. web. optimization; 9 using System. web. routing; 10 using WebApp. models; 11 12 namespace WebApp13 {14 public class MvcApplication: System. web. httpApplication15 {16 protected void Application_Start () 17 {18 AreaRegistration. regist ErAllAreas (); 19 FilterConfig. registerGlobalFilters (GlobalFilters. filters); 20 RouteConfig. registerRoutes (RouteTable. routes); 21 BundleConfig. registerBundles (BundleTable. bundles); 22 // enable the thread to write exceptions in the queue to the file 23 // enable a thread to scan the queue 24 string filePath = Server. mapPath ("/Log/"); 25 ThreadPool. queueUserWorkItem (a) => 26 {27 while (true) 28 {29 // determine whether data in the queue is 30 if (MyExceptionAttribute. predictionqueue. count ()> 0) 31 {32 Exception ex = MyExceptionAttribute. ExceptionQueue. Dequeue (); 33 if (ex! = Null) 34 {35 // write the exception information to the file 36 string fileName = DateTime. now. toString ("yyyy-MM-dd"); 37 File. appendAllText (fileName + ". txt ", ex. toString (), System. text. encoding. UTF8); 38} 39 else40 {41 // if there is no data leisure in the queue 300042 Thread. sleep (3000); 43} 44} 45 else46 {47 // if there is no data leisure in the queue 300048 Thread. sleep (3000); 49} 50 51} 52}, filePath); 53} 54} 55}

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4.1. Use the QueueUserWorkItem method in the ThreadPool of the thread pool. The QueueUserWorkItem has two reloads, which can be viewed in F12.

4.2 if no data exists in the queue, rest Thread. Sleep (3000 );

5. Create a controller Test. Test

 1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Web; 5 using System.Web.Mvc; 6  7 namespace WebApp.Controllers 8 { 9     public class TestController : Controller10     {11         //12         // GET: /Test/13         public ActionResult Index()14         {15             return View();16         }17         public ActionResult ShowResult()18         {19             int a = 2;20             int b = 0;21             int c = a / b;22             return Content(c.ToString());23         }24     }25 }

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As for Log4net, I want to write down the details and record them when I have time.