尝试处理 PreviewKeyUp(或 KeyUp).如果这不起作用，那么您的窗口或代码中必须有更多内容(您是否正在处理这些事件的其他实例)?

Try handling PreviewKeyUp (or KeyUp) instead. If that does not work, then there must be more to your window or code (are you handling other instances of these events)?