在WPF中捕获子线程中的未处理异常

I have a WPF application that spins off several threads. I have defined a DispatcherUnhandledException event handler in App.xaml.cs that displays a detailed error message, and this handler gets called every time the UI thread encounters an exception. The problem is with the child threads: their unhandled exceptions never get handled. How do I do this?

我有一个WPF应用程序，可以旋转多个线程。我在App.xaml.cs中定义了一个DispatcherUnhandledException事件处理程序，它显示详细的错误消息，每次UI线程遇到异常时都会调用此处理程序。问题在于子线程：它们未处理的异常永远不会得到处理。我该怎么做呢？

Sample code:

示例代码：

private void Application_DispatcherUnhandledException(object sender, System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e)
{
    MessageBox.Show("detailed error message");
}

private void Application_Startup(object sender, StartupEventArgs e)
{
    //...
    //If an Exception is thrown here, it is handled
    //...

    Thread[] threads = new Thread[numThreads];
    for(int i = 0; i < numThreads; i++)
    {
        threads[i] = new Thread(doWork);
        threads[i].Start();
    }
}

private void doWork()
{
    //...
    //Exception thrown here and is NOT handled
    //...
}

Edit: Once an unhandled exception occurs, I want to display an error message with a stack trace, and then exit the application.

编辑：一旦发生未处理的异常，我想显示带有堆栈跟踪的错误消息，然后退出应用程序。

2 个解决方案

#1

Try hooking up to the AppDomain.CurrentDomain.UnhandledException event as well.

尝试连接到AppDomain.CurrentDomain.UnhandledException事件。

#2

This is by design, you should use a try/catch at the top-level of DoWork. Some threading models cater for this, take a look at the Backgroundworker for an example.

这是设计使然，您应该在DoWork的顶层使用try / catch。一些线程模型可以满足这一需求，请查看Backgroundworker的示例。

The .NET 4 Task class provides a nice interface to this problem. Until then, you will have to take care of it yourself, or use the BGW or IAsyncResult models.

.NET 4 Task类为此问题提供了一个很好的界面。在此之前，您必须自己处理，或使用BGW或IAsyncResult模型。

#1