启动外部进程后，WPF ContextMenu仍然可见 [英] WPF ContextMenu still visible after launching an external process

问题描述

我正在从ContextMenu启动外部应用程序，并且必须在目标应用程序运行时阻止源应用程序。为此，我使用 Process.WaitForExit（）来避免源应用程序对事件做出响应。

I'm launching an external application from a ContextMenu, and I must block the the source application while the target application is running. To achieve this I'm using Process.WaitForExit() to avoid the source application responding to events.

问题是上下文菜单仍在目标应用程序的前面。让我们用一个简单的示例查看它：

The problem is the context menu is still ahead the target application. Let's see it with a simple example:

这是我在示例中使用的代码。

This is the code I'm using for the example.

    public MainWindow()
    {
        InitializeComponent();

        this.ContextMenu = new ContextMenu();

        MenuItem menuItem1 = new MenuItem();
        menuItem1.Header = "Launch notepad";
        menuItem1.Click += MyMenuItem_Click;
        this.ContextMenu.Items.Add(menuItem1);
    }

    void MyMenuItem_Click(object sender, RoutedEventArgs e)
    {
        Process p = new Process();
        p.StartInfo.FileName = "notepad.exe";
        p.StartInfo.CreateNoWindow = false;
        p.Start();
        p.WaitForExit();
        p.Close();
    }

如何在显示目标应用程序之前使ContextMenu消失？ / p>

How could I make the ContextMenu to disappear before the target application is displayed?

推荐答案

基于 Jcl ...

我找到了一个使用自定义MenuItems菜单的简单解决方案。它会延迟 MenuItem.Click（）事件，直到父 ContextMenu 关闭。

I found a simple solution using custom MenuItems for the menu. It delays the MenuItem.Click() event until the parent ContextMenu is closed.

class MyMenuItem : MenuItem
{
    protected override void OnClick()
    {
        ContextMenu parentContextMenu = Parent as ContextMenu;
        parentContextMenu.Closed += ContextMenu_Closed;
        parentContextMenu.IsOpen = false;
    }

    void ContextMenu_Closed(object sender, RoutedEventArgs e)
    {
        ContextMenu parent = Parent as ContextMenu;
        parent.Closed -= ContextMenu_Closed;
        base.OnClick();
    }
}

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