在WPF中的子线程中捕获未处理的异常 [英] Catching Unhandled Exceptions in Child Threads in WPF

问题描述

我有一个WPF应用程序旋转几个线程。我已经在App.xaml.cs中定义了一个DispatcherUnhandledException事件处理程序，显示一个详细的错误消息，每当UI线程遇到异常时，这个处理程序被调用。问题在于子线程：他们未处理的异常从未被处理。如何做到这一点？

示例代码：

  private void Application_DispatcherUnhandledException（object sender，System.Windows.Threading.DispatcherUnhandledExceptionEventArgs e）
 {
 MessageBox.Show（details error message）; 
} 
 
 private void Application_Startup（object sender，StartupEventArgs e）
 {
 // ... 
 //如果在此抛出异常，它被处理
 // ... 
 
 Thread [] threads = new Thread [numThreads]; （int i = 0; i< numThreads; i ++）
 {
 threads [i] = new Thread（doWork）; 
 
 threads [i] .Start（）; 
} 
} 
 
 private void doWork（）
 {
 // ... 
 //此处抛出的异常未处理
 // ... 
} 
  

编辑： strong>一旦发生未处理的异常，我想显示一个包含堆栈跟踪的错误消息，然后退出应用程序。

解决方案

尝试连接到 AppDomain.CurrentDomain.UnhandledException 事件也是如此。

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?

Sample code:

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.

解决方案

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

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