WPF 回车转Tab实现跳转

最新推荐文章于 2022-09-12 19:22:48 发布

原创最新推荐文章于 2022-09-12 19:22:48 发布 · 1k 阅读

1 ·

CC 4.0 BY-SA版权

文章标签：

#wpf #keyboard #object #null

本文介绍了如何在WPF应用程序中通过重写窗体的KeyDown事件来实现键盘焦点的自动切换，包括两种实现方法：一种是在窗体级别进行重写，另一种是在基容器如Grid的KeyDown事件中实现。

1.重写窗体的KeyDown事件

Code Snippet
 protected override void OnKeyDown(KeyEventArgs e)
{
    if (e.Key == Key.Enter)
    {
        // MoveFocus takes a TraveralReqest as its argument.
        TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);
 
        // Gets the element with keyboard focus.
        UIElement elementWithFocus = Keyboard.FocusedElement as UIElement;
 
        // Change keyboard focus.
        if (elementWithFocus != null)
        {
            elementWithFocus.MoveFocus(request);
        }
        e.Handled = true;
    }
    base.OnKeyDown(e);
}
 

2.在基容器如Grid的KeyDown事件中

Code Snippet
  <Grid KeyDown="Grid_KeyDown">
 

实现代码

Code Snippet
 private void Grid_KeyDown(object sender, KeyEventArgs e)
{
    var uie = e.OriginalSource as UIElement;
    if (e.Key == Key.Enter)
    {
        uie.MoveFocus(new TraversalRequest(FocusNavigationDirection.Next));
        e.Handled = true;
    }
}
 