unhandled-exception | 易学教程

Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception?

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问题 Why is UnhandledExceptionEventArgs.ExceptionObject an object and not an Exception ? I am attaching to AppDomain.UnhandledException . I would like to cast UnhandledExceptionEventArgs.ExceptionObject to an Exception and interogate it. And with this in mind will it ever be null? The MSDN documentation is not exatly useful. Gets the unhandled exception object. 回答1: This cannot be typed to Exception because it's possible to throw objects in .Net that do not derive from System.Exception. This is

Visual Studio 2015 break on unhandled exceptions not working

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问题 Visual studio used to have a specific checkbox to "Break on Un-handled exception". In 2015 this has been removed (or moved somewhere I cannot find it). So now my converted projects no longer break if I fail to provide a user-level exception handler. I don't want to break on all "thrown exceptions" because I handle specific ones. Just where I fail to provide a specific handler. Right now my code simply exits the current procedure and continues execution at the next call stack location, NOT

Unhandled exceptions in BackgroundWorker

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I have a small WinForms app that utilizes a BackgroundWorker object to perform a long-running operation. The background operation throws occasional exceptions, typically when somebody has a file open that is being recreated. Regardless of whether the code is run from the IDE or not .NET pops up an error dialog informing the user that an Unhandled exception has occurred. Compiling the code using the Release configuration doesn't change this either. According to MSDN : If the operation raises an exception that your code does not handle, the BackgroundWorker catches the exception and passes it

catch all unhandled exceptions in ASP.NET Web Api

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How do I catch all unhandled exceptions that occur in ASP.NET Web Api so that I can log them? So far I have tried: Create and register an ExceptionHandlingAttribute Implement an Application_Error method in Global.asax.cs Subscribe to AppDomain.CurrentDomain.UnhandledException Subscribe to TaskScheduler.UnobservedTaskException The ExceptionHandlingAttribute successfully handles exceptions that are thrown within controller action methods and action filters, but other exceptions are not handled, for example: Exceptions thrown when an IQueryable returned by an action method fails to execute

How to find which promises are unhandled in Node.js UnhandledPromiseRejectionWarning?

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Node.js from version 7 has async/await syntactic sugar for handling promises and now in my code the following warning comes up quite often: (node:11057) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): ReferenceError: Error: Can't set headers after they are sent. (node:11057) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code. Unfortunately there's no reference to the line where the catch is missing. Is there any way to find it

How do I get at the exception information when using MiniDumpWriteDump out-of-process?

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问题 When using the MiniDumpWriteDump function to create a core dump of a process on Windows, it is recommended (e.g. here, and here) that the MiniDumpWriteDump is run from another "watchdog" process because it may well not work when called from within the same process. At the moment, our application is calling it in-process on an unhandled exception (we do it from a watchdog thread). Since we sometimes have problems with it not working, we'd like to move it to a separate process. Now, signalling

How can I set up .NET UnhandledException handling in a Windows service?

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问题 protected override void OnStart(string[] args) { AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException); Thread.Sleep(10000); throw new Exception(); } void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e) { } I attached a debugger to the above code in my windows service, setting a breakpoint in CurrentDomain_UnhandledException, but it was never hit. The exception pops up saying that it is unhandled, and

catch another process unhandled exception

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问题 I wish to know if i can catch the unhandled exceptions thrown by another process which I started using the Process.Start(...) I know i can catch the standered error using this link , but what I want is to catch the error that are usually caught by the Just In Time debugger of the.net environment, the window with the following words: "An unhandled exception has occurred in your application . If you Continue, the application will ignore this error and attempt to continue . If you click Quit,

CryptographicException: Padding is invalid and cannot be removed and Validation of viewstate MAC failed

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Monitoring my global exception logs this error seems to be impossible to remove no matter what I do, I thought I finally got rid of it but it's back again. You can see a strack trace of the error on a similar post here . Notes about the environment: IIS 6.0, .NET 3.5 SP1 single server ASP.NET application Steps already taken: <system.web> <machineKey validationKey="big encryption key" decryptionKey="big decryption key" validation="SHA1" decryption="AES" /> In my Page Base for all of my pages protected override void OnInit(EventArgs e) { const string viewStateKey = "big key value"; Page

What is an unhandled promise rejection?

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For learning Angular 2, I am trying their tutorial. I am getting an error like this: (node:4796) UnhandledPromiseRejectionWarning: Unhandled promise rejection (r ejection id: 1): Error: spawn cmd ENOENT [1] (node:4796) DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node. js process with a non-zero exit code. I went through different questions and answers in SO but could not find out what an "Unhandled Promise Rejection" is. Can anyone simply explain me what it is and also what Error: spawn cmd ENOENT is