如何监视WInForm应用程序中的弹出错误

Question

I have a very big C# Winform application(contains thousands of exceptions and error popup). Is there any way that I can monitor this application when it popup error? so that I can disappear it and output some signal after catch it.

Answer 1

Application.ThreadException (event) that is:

Occurs when an untrapped thread exception is thrown.

...

It uses the ThreadException event to handle UI thread exceptions, and the UnhandledException event to handle non-UI thread exceptions.

Read more about this at here .

Here is an example code:

        static void Main(string[] args)
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            Application.ThreadException += new ThreadExceptionEventHandler(Application_ThreadException);
            Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
            AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(CurrentDomain_UnhandledException);

            Application.Run(new Form1());
        }

        static void Application_ThreadException(object sender, ThreadExceptionEventArgs e)
        {
            MessageBox.Show(e.Exception.Message, "Unhandled Thread Exception");
        }

        static void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
        {
            MessageBox.Show((e.ExceptionObject as Exception).Message, "Unhandled UI Exception");
        }

Caution

Because this is a static event, you must detach your event handlers when your application is disposed, or memory leaks will result.