Application Level Error Handling Wpf
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Application Level Error Handling In Asp.net C#
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Wcf Error Handling
implement a messagebox with: "Sorry for the inconvenience ..." c# .net wpf exception exception-handling share|improve this question edited Jun 15 at 11:50 Jakob Möllas 2,69931542 asked Sep 24 '09 at 15:40 Scott Olson 1,40921211 add a comment| 8 Answers 8 active oldest votes up vote 106 down vote accepted You can handle the AppDomain.UnhandledException event EDIT: actually, this event is probably more adequate: Application.DispatcherUnhandledException share|improve this answer edited Sep 24 '09 at 15:50 answered Sep 24 '09 at 15:43 Thomas Levesque 194k40358557 4 Add the handler in the forms constructor like this: AppDomain.Current.UnhandledException+=... –Dabblernl Sep 24 '09 at 15:47 11 Bad idea if you create multiple instances of the window... –Thomas Levesque Sep 24 '09 at 15:50 1 Hi Thomas, thanks for your answer. Appdomain.UnHandledException works great for me. –Scott Olson Sep 28 '09 at 9:12 4 could add the handler at App.xaml.cs I guess –George Birbilis Apr 3 '14 at 20:24 add a comment| up vote 338 down vote You can trap unhandle
are likely to throw an exception, then you should wrap it in a try-catch block to handle the exception gracefully. For silverlight error handling instance, consider this example: private void Button_Click(object sender, RoutedEventArgs e) { string s linq error handling = null; s.Trim(); } Obviously it will go wrong, since I try to perform the Trim() method on a
Ajax Error Handling
variable that's currently null. If you don't handle the exception, your application will crash and Windows will have to deal with the problem. As you can see, that isn't very user friendly: In http://stackoverflow.com/questions/1472498/wpf-global-exception-handler this case, the user would be forced to close your application, due to such a simple and easily avoided error. So, if you know that things might go wrong, then you should use a try-catch block, like this: private void Button_Click(object sender, RoutedEventArgs e) { string s = null; try { s.Trim(); } catch(Exception ex) { MessageBox.Show("A handled exception just occurred: " + ex.Message, "Exception http://www.wpf-tutorial.com/wpf-application/handling-exceptions/ Sample", MessageBoxButton.OK, MessageBoxImage.Warning); } } However, sometimes even the simplest code can throw an exception, and instead of wrapping every single line of code with a try- catch block, WPF lets you handle all unhandled exceptions globally. This is done through the DispatcherUnhandledException event on the Application class. If subscribed to, WPF will call the subscribing method once an exception is thrown which is not handled in your own code. Here's a complete example, based on the stuff we just went through:
Zones | Agile Big Data Cloud Database DevOps Integration IoT Java Mobile Performance Web Dev Let's be friends: Order in Chaos: Handling unhandled exceptions in a WPF application by Arik Poznanski · Aug. 28, 11 · Like (0) Comment (0) Save Tweet {{ articles[0].views | formatCount}} Views Edit Delete {{ articles[0].isLocked ? 'Enable' : 'Disable' }} comments {{ articles[0].isLimited ? 'Remove comment limits' : 'Enable moderated comments' }} Join the DZone community and get the full member experience. Join For Free Introduction So you want to handle somehow all the unhandled exceptions in your application. Usually you want to accomplish one of the following: Log the exception for later diagnostics Present the user an unhandled exception UI, nicer than the default You heard there’s an event you should register, or maybe you find one by mistake, but is it the correct one? Did you know there are four (!) different events for handling unhandled exceptions in the .NET framework? So what is the difference between them and when should we use each one? This post will hopefully answer these questions. Note: this is NOT a replacement for try-catch blocks! Summary I’ll begin with the summary to avoid boring busy developers. In a typical WPF application you should use Application.Current.DispatcherUnhandledException for exceptions generated on the UI thread and AppDomain.CurrentDomain.UnhandledException for all the other exceptions. Now, for the details.. System.Windows.Forms.Application.ThreadException This event is used for catching unhandled exceptions only on UI threads created by WinForms. Other exceptions, generated on non-UI threads won’t arrive to this event. Use AppDomain.Current.UnhandledException to catch them. The default behavior