Question

   static class Program
   {
       [STAThread]
       static void Main()
       {
           /* From my understanding this should install the exception handler */
           Application.ThreadException += GetEventHandler();
           /* Since posting this question I have found that I need to add the 
              following line, but even with the following line in place the
              exceptions thrown are not caught.... */
           Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
           /* Some auto generated code here */
           Application.Run(new MyForm());
       }


       private static ThreadExceptionEventHandler GetEventHandler()
       {
           return new ThreadExceptionEventHandler(OnThreadException);
       }

       private static void OnThreadException(object sender, ThreadExceptionEventArgs e)
       {

           MessageBox.Show("Big error...");

       }
   }

根据： http://msdn.microsoft.com/en-us/library/system.windows.forms.application.threadexception%28v=vs.71%29.aspx 这应该工作。但是当在MyForm类内部抛出异常时，它不会显示“Big error ...”消息框，但告诉我没有异常处理程序。任何建议将不胜感激。

Answer 1

您需要将UnhandleExceptionMode设置为CatchException

       /* From my understanding this should install the exception handler */
       Application.ThreadException += GetEventHandler();
       Application.SetUnhandledExceptionMode(UnhandledExceptionMode.CatchException);
       /* Some auto generated code here */
       Application.Run(new MyForm());

Application.ThreadException只能捕获UI线程中引发的异常。在由于Windows通知而运行的代码中。或者在技术术语中，由消息循环触发的事件。大多数Winforms事件都符合这一类别。

它做什么 not 陷阱是在任何非UI线程上引发的异常，例如以Thread.Start()，ThreadPool.QueueUserWorkItem或委托{s}开头的工作线程{1}}方法。这些中的任何未处理的异常都将终止该应用程序。

Application.ThreadException无法正常工作

1 个答案: