【原】WPF按鈕或page獲取焦點后，按backspace鍵，后退的解決方法

1.在MainWindow構造函數中添加如下代碼,定義路由監聽事件

  //利用路由事件監聽所有的按鈕按鍵事件
            frameRoot.AddHandler(Button.PreviewKeyDownEvent, new RoutedEventHandler(Button_PreviewKeyDown)); 

2.定義Button_PreviewKeyDown

   /// <summary>
        /// 處理backspace導致后退的問題
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void Button_PreviewKeyDown(object sender, RoutedEventArgs e)
        {
            if (e.OriginalSource.GetType().Name == typeof(Button).Name || e.OriginalSource.GetType().Name == typeof(Page).Name)
            {
                e.Handled = true;
            }
        }