问 使用ShowDialog()的WPF模式窗口会阻塞所有其他窗口

EN

我遇到了同样的问题，并实现了这篇文章中描述的模式对话框行为： http://social.msdn.microsoft.com/Forums/vstudio/en-US/820bf10f-3eaf-43a8-b5ef-b83b2394342c/windowsshowmodal-to-parentowner-window-only-not-entire-application?forum=wpf

我还尝试了多UI线程方法，但这会导致第三方库(caliburn micro & telerik wpf控件)出现问题，因为它们不是为在多个UI线程中使用而构建的。可以让它们与多个UI线程一起工作，但我更喜欢更简单的解决方案……

如果按照所述方式实现对话框，则不能再使用DialogResult属性，因为这将导致“只有在创建窗口并显示为对话框之后才能设置DialogResult”异常。只需实现您自己的属性并使用它。

您需要以下windows API参考：

/// <summary>
/// Enables or disables mouse and keyboard input to the specified window or control. 
/// When input is disabled, the window does not receive input such as mouse clicks and key presses. 
/// When input is enabled, the window receives all input.
/// </summary>
/// <param name="hWnd"></param>
/// <param name="bEnable"></param>
/// <returns></returns>
[DllImport("user32.dll")]
private static extern bool EnableWindow(IntPtr hWnd, bool bEnable);

然后使用以下命令：

// get parent window handle
IntPtr parentHandle = (new WindowInteropHelper(window.Owner)).Handle;
// disable parent window
EnableWindow(parentHandle, false);
// when the dialog is closing we want to re-enable the parent
window.Closing += SpecialDialogWindow_Closing;
// wait for the dialog window to be closed
new ShowAndWaitHelper(window).ShowAndWait();
window.Owner.Activate();

这是在关闭对话框时重新启用父窗口的事件处理程序：

private void SpecialDialogWindow_Closing(object sender, System.ComponentModel.CancelEventArgs e)
    var win = (Window)sender;
    win.Closing -= SpecialDialogWindow_Closing;
    IntPtr winHandle = (new WindowInteropHelper(win)).Handle;
    EnableWindow(winHandle, false);
    if (win.Owner != null)
        IntPtr parentHandle = (new WindowInteropHelper(win.Owner)).Handle;
        // reenable parent window
        EnableWindow(parentHandle, true);
}

这是实现模式对话行为所需的ShowAndWaitHelper (这会阻止线程的执行，但仍会执行消息循环。

private sealed class ShowAndWaitHelper
    private readonly Window _window;
    private DispatcherFrame _dispatcherFrame;
    internal ShowAndWaitHelper(Window window)
        if (window == null)
            throw new ArgumentNullException("window");
        _window = window;
    internal void ShowAndWait()
        if (_dispatcherFrame != null)
            throw new InvalidOperationException("Cannot call ShowAndWait while waiting for a previous call to ShowAndWait to return.");
        _window.Closed += OnWindowClosed;
        _window.Show();
        _dispatcherFrame = new DispatcherFrame();
        Dispatcher.PushFrame(_dispatcherFrame);
    private void OnWindowClosed(object source, EventArgs eventArgs)
        if (_dispatcherFrame == null)
            return;