Asp.Net Web Api'den Uygun Yığın İzleme Async/Görev çağrıları

Question

Bir istemci Web Api'ye çağrıları kullandığımda bir hata meydana geliyor. Sorun, geri döneceğim yığın izinin biraz okunamaması, satır numaralarının olmaması, böylece nereye bakacağımı bilmiyorum. Bu bir Json cevabı olarak iade ediliyor.

"message": "An error has occurred.", 
"exceptionMessage": "Object reference not set to an instance of an object.", 
"exceptionType": "System.NullReferenceException", 
"stackTrace": " at WakeSocial.Gateway.WebApi.Host.Controllers.NotificationsController.<Response>d__7.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Controllers.AuthenticationFilterResult.<ExecuteAsync>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n at System.Web.Http.Dispatcher.HttpControllerDispatcher.<SendAsync>d__1.MoveNext()" 
} 

hata yüzden daha uygun sorunu ayıklamaya olabilir oluştu hat sayısını döndürmek için web API konfigürasyon dosyasında ki bir yolu var mı?

mesele burada kaplıydı: Stack traces with async/await

Şu anda .Net 4.5 usng ediyorum henüz hatalar hala bu şekilde outputted olsun.

Answer 1

I, örneğin özel durumlar içinde yığın izleme bilgilerini saklayan bir uzantı, ım kullanma, orijinal kod: okunabilir yığın izleme

try{  
    await NestedAsyncOperation(); 
}catch(NullReferenceException e){ 
    Debug.WriteLine(e) 
} 

:

try{  
    await NestedAsyncOperation().Trace(); 
}catch(Exception e){ 
    e.Catch((NullReferenceException ex) => { 
    Debug.WriteLine(e); 
    }).RethrowUnhandled(); 
} 

ve çıkış olacak hattı ile yığın izleme içerir sayılar. Daha fazlasını görün https://github.com/ilio/AsyncStackTrace/blob/master/UnitTests/AsyncStackTraceExtensionUnitTest.cs