WPF KeyDown 和 Keyup 事件
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WPF KeyDown and Keyup events
提问by TheWommies
Hi when I do in one of my user controls in a WPF application,
嗨，当我在 WPF 应用程序中的一个用户控件中进行操作时，
this.KeyUp += new KeyEventHandler(ControlViewer_KeyUp);
or
或者
this.KeyDown += new KeyEventHandler(ControlViewer_KeyUp);
or
或者
this.AddHandler(Window.KeyDownEvent, new KeyEventHandler(ControlViewer_KeyUp), true);
I can never get the key events to fire when pusing a key on the keyboard.
按下键盘上的键时，我永远无法触发按键事件。
Would anyone know why?
有谁知道为什么？
回答by Aran Mulholland
the event is probably being handled before you can get to it, if any handlers mark the KeyEventArgs e.Handled = true;you wont get the notification, try using the PreviewKeyDownor PreviewKeyUpevents and see if you have more luck.
该事件可能在您到达之前就已被处理，如果任何处理程序标记KeyEventArgs e.Handled = true;您将不会收到通知，请尝试使用PreviewKeyDown或PreviewKeyUp事件，看看您是否有更多的运气。
