wpf - 阻止从其他线程启动WPF对话框

Question

我们要在主窗口上创建并启动模态对话框框。由于某种原因，此过程是从其他线程启动的。这个不同的线程调用execute方法-必须阻塞直到对话框关闭。问题是-怎么样？在此代码上，执行不会被阻塞。 Join()调用也无法按预期方式工作。

public void Execute()
{
    Thread newWindowThread = new Thread(new ThreadStart(ThreadStartingPoint));
    newWindowThread.SetApartmentState(ApartmentState.STA);
    newWindowThread.IsBackground = true;
    newWindowThread.Start();
    // newWindowThread.Join();
}


private void ThreadStartingPoint()
{
    this.ParameterDialog = new ParameterDialog();
    this.ParameterDialog.ShowDialog();
    System.Windows.Threading.Dispatcher.Run();
}

任何想法如何实现这种行为？提前致谢!

Answer 1

当对话框窗口关闭时，您应该关闭调度程序:

public void Execute()
{
    Thread newWindowThread = new Thread(new ThreadStart(ThreadStartingPoint));
    newWindowThread.SetApartmentState(ApartmentState.STA);
    newWindowThread.IsBackground = true;
    newWindowThread.Start();
    newWindowThread.Join();
}

private void ThreadStartingPoint()
{
    this.ParameterDialog = new ParameterDialog();
    this.ParameterDialog.Closed += ParameterDialog_Closed;
    this.ParameterDialog.ShowDialog();
    System.Windows.Threading.Dispatcher.Run();
}

private void ParameterDialog_Closed(object sender, EventArgs e)
{
    this.ParameterDialog.Closed -= ParameterDialog_Closed;
    Dispatcher.CurrentDispatcher.BeginInvokeShutdown(DispatcherPriority.Background);
}