【原】WPF按钮或page获取焦点后，按backspace键，后退的解决方法

1.在MainWindow构造函数中添加如下代码,定义路由监听事件

  //利用路由事件监听所有的按钮按键事件
            frameRoot.AddHandler(Button.PreviewKeyDownEvent, new RoutedEventHandler(Button_PreviewKeyDown)); 

2.定义Button_PreviewKeyDown

   /// <summary>
        /// 处理backspace导致后退的问题
        /// </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;
            }
        }