我怎样才能得到“[MyApp]遇到问题并且需要关闭”已处理 AppDomain.UnhandledException 的消息？

Question

我收到报告称，用户收到 Windows XP 错误“[我的应用程序]遇到错误，需要关闭”消息。此消息表明我的应用程序中存在未处理的异常，对吗？我已连接 AppDomain.Unhandlled 异常来处理代码中任何未捕获的异常，因此我不确定用户如何收到此错误。类似问题的答案提到了导致此问题的单独线程，但这些线程仍然在同一个应用程序域中运行，因此它们会被处理，不是吗？这是我的处理代码，以防万一您发现它抛出异常的地方：

public void CurrentDomain_UnhandledException(object sender, UnhandledExceptionEventArgs e)
    {
        #region Global Exception Handling
        string support = String.Empty;

        //try to get the support information from the common project
        try
        {
            support = Common.Constants.ErrorMessages.RETRY_OR_CONTACT_SUPPORT;
        }
        catch(Exception)
        {
            //Use hard coded support info if the common project is not accessible
            support = "Please try again or contact the Support Center at 877-555-5555";
        }

        string message = "An error occured that OASIS was not able to recover from. " + support;

        try
        {
            //Try to use the OasisErrorDialog to show the error. If the exception derives from Exception, use OasisErrorDialog to log it.
            if (e.ExceptionObject is Exception)
                OasisErrorDialog.ShowErrorDialog(message, "A Serious Error Has Occured", true, true, (Exception)e.ExceptionObject);
            else
            {
                //The exception doesn't derive from Exception so we need to try to log it using StepUp
                OasisErrorDialog.ShowErrorDialog(message, "A Serious Error Has Occured");
                ExceptionHandler.HandleException("An unhandled error that does not derive from the Exception class was thrown." + e.ExceptionObject.ToString());
            }
        }
        catch (Exception)
        {
            //The OasisErrorDialog wasn't available so display the error in a standard MessageBox
            MessageBox.Show(message, "A Serious Error Has Occured");

            try
            {
                //If the StepUp framework is still working, log the exception info
                if (e.ExceptionObject is Exception)
                    ExceptionHandler.HandleException("An unhandled exception occured", (Exception)e.ExceptionObject);
                else
                    ExceptionHandler.HandleException("An unhandled error occured: "+e.ExceptionObject.ToString());
            }
            catch (Exception) { }
        }
        #endregion
    }

Answer 1

如果您的应用程序做了一些非常可怕的事情（例如，错误的互操作导致内存损坏），那么您将不会看到异常。你的申请只会失败。

稍微不那么可怕的事情（例如内存不足）也可能导致应用程序在不运行异常处理程序的情况下失败。

这个问题及其答案< /a> 讨论捕获所有异常的不可能性。