Application Level Error Handling In Windows Application
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Exception Handling In Vb.net Windows Application
takes a minute: Sign up Best Practice for Exception Handling in a Windows Forms Application? up vote 109 down vote favorite 94 I'm currently in the process of writing my first Windows Forms application. I've read a few C# books
Windows Application Error The Exception Breakpoint
now so I've got a relatively good understanding of what language features C# has to deal with exceptions. They're all quite theoretical however so what I haven't got yet is a feel for how to translate the basic concepts into a good exception-handling model in my application. Would anyone like to share any pearls of wisdom on the subject? Post any common mistakes you've seen newbies like myself make, and any general advice on handling exceptions in a way that global error handling will my application more stable and robust. The main things I'm currently trying to work out are: When should I re-throw an exception? Should I try to have a central error-handling mechanism of some kind? Do handling exceptions which might be thrown have a performance hit compared with pre-emptively testing things like whether a file on disk exists? Should all executable code be enclosed in try-catch-finally blocks? Are there any times when an empty catch block might be acceptable? All advice gratefully received! c# winforms exception-handling share|improve this question edited Oct 13 '11 at 13:56 Otiel 9,63094491 asked Oct 8 '08 at 16:13 Jon Artus 2,390103039 add a comment| 15 Answers 15 active oldest votes up vote 73 down vote A few more bits ... You absolutely should have a centralized exception handling policy in place. This can be as simple as wrapping Main() in a try/catch, failing fast with a graceful error message to the user. This is the "last resort" exception handler. Preemptive checks are always correct if feasible, but not always perfect. For example, between the code where you check for a file's existence and the next line where you open it, the file could have been deleted or some other issue may impede your access. You still need try/catch/finally in that world. Use both the preemptive check and the try/catch/finally as appropriate. Never "swallow" an exception, except in the most well-documented cases when you are
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Global Error Handling Angularjs
9 Documentation APIs and reference Dev centers Retired content Samples We’re sorry. global error handling javascript The content you requested has been removed. You’ll be auto redirected in 1 second. MSDN Library MSDN global error handling web api 2 Library MSDN Library MSDN Library Design Tools Development Tools and Languages Mobile and Embedded Development .NET Development Office development Online Services Open Specifications patterns & practices Servers and Enterprise http://stackoverflow.com/questions/183589/best-practice-for-exception-handling-in-a-windows-forms-application Development Speech Technologies Web Development Windows Desktop App Development TOC Collapse the table of content Expand the table of content This documentation is archived and is not being maintained. This documentation is archived and is not being maintained. How to: Handle Application-Level Errors Other Versions Visual Studio 2010 .NET Framework 4 Visual Studio 2008 .NET Framework 3.0 https://msdn.microsoft.com/en-us/library/24395wz3.aspx Visual Studio 2005 This code example shows how to create an error handler in the Global.asax file that will catch all unhandled ASP.NET errors while processing a request — in other words, all the errors that are not caught with a Try/Catch block or in a page-level error handler. In the example, the handler transfers control to a generic error page named GenericErrorPage.aspx, which interprets the error and displays an appropriate message. Example The following example is from a complete code sample in Complete Example for Error Handlers. Security Note Never set customErrors to Off in your Web.config file if you do not have an Application_Error handler in your Global.asax file. Potentially compromising information about your Web site can be exposed to anyone who can cause an error to occur on your site. C#VB Copy void Application_Error(object sender, EventArgs e) { // Code that runs when an unhandled error occurs // Get the exception object. Exception exc = Server.GetLastError(); // Handle HTTP errors if (exc.GetType() == typeof(HttpException)) { // The Comp
handlers - winforms Visual Studio Languages , .NET Framework > Visual C# Question 0 Sign in to vote Hi, I have a standard winforms .net https://social.msdn.microsoft.com/Forums/vstudio/en-US/5911ec76-7e48-41e5-8154-7a754519e131/some-unhandled-exceptions-not-being-caught-in-my-global-error-handlers-winforms?forum=csharpgeneral 3.5 app. Some of this app calls other .dlls (projects n the solution), and even a windows service via wcf. However, I have noticed that some exceptions (they are coming from other projects but this is just fate I didn't do any process of elimination etc) do not get handled in my global error handlers. I have global error handlers for both unhandledexception and error handling threadexception (event handlers which show a msg box, do some logging, close the app). Some other exceptions, do get handled, however. What gives? Thanks\ Thursday, July 21, 2011 11:33 PM Reply | Quote Answers 1 Sign in to vote Take a look at these two links and the posted samples. http://msdn.microsoft.com/en-us/library/system.appdomain.unhandledexception.aspx http://msdn.microsoft.com/en-us/library/system.windows.forms.application.threadexception.aspx An unhandled exception will always terminate your application. The only way global error handling to avoid unhandled exceptions is to catch them. The documentation states that the best that you can do is log the error prior to the application being terminated. Notice that the thread exception sample sets a property! Please take note of the warning about connecting to static events and the potential for memory leaks if they are not disconnected prior to exiting the application. Rudy =8^D Mark the best replies as answers. "Fooling computers since 1971." http://thesharpercoder.blogspot.com/ Marked as answer by Martin_XieModerator Monday, August 08, 2011 9:51 AM Wednesday, August 03, 2011 9:13 PM Reply | Quote Moderator All replies 1 Sign in to vote If your application is simply shutting down, then it is likelythat an unhandled exception is being thrown on a thread in your library. Thread exceptions must be caught on the thread that threw the exception, or at the site where the thread is invoked. Rudy =8^D Mark the best replies as answers. "Fooling computers since 1971." http://thesharpercoder.blogspot.com/ Thursday, July 21, 2011 11:51 PM Reply | Quote Moderator 0 Sign in to vote Check this. http://msdn.microsoft.com/en-us/library/ff649552.aspx chanmmchanmm Friday, July 22, 2011 2:57 AM Reply | Qu