Mnemonic not showing on a System.Windows.Forms.ContextMenu

问题

I'm having some problems with Mnemonics and ContextMenus - although the Mnemonic property of the Menutem is set correctly the little underline wont show under the relevant key. Here is my code:

private void Form1_MouseDown(object sender, MouseEventArgs e)
{
    System.Windows.Forms.ContextMenu menu = new ContextMenu();
    menu.MenuItems.Add("Hello &World");
    menu.Show(this, e.Location);
}

What am I doing wrong?

回答1:

There is a windows setting to "Hide underlined letters for keyboard navigation until I press the ALT key." It is under Display Properties --> Appearance --> Effects on XP ... Could that be what you're seeing?

回答2:

Your code should work. Try using different text for your menu item. e.g "&Hello" or "&World". Also try setting the ShowShortcut to true, though .NET should do it for you by default.

menu.MenuItems[0].ShowShortcut = true;

来源：https://stackoverflow.com/questions/1520126/mnemonic-not-showing-on-a-system-windows-forms-contextmenu