如何通过在wpf中按退格键来关注texbox [英] how to focus texbox by pressing backspace key in wpf

问题描述

任何人都可以帮助我....如何在按下退格键的同时关注文本框和其他控件....

Can anybody help me....how can i focus textbox and other controls while pressing backspace key....

推荐答案

在你的窗口上你应该添加PreviewKeyUp事件。

如果键是退格键，则将句柄设置为true。

调用RequestFocusChange（）

On your window you should add the PreviewKeyUp event.
if the key is backspace, set handled to true.
Call RequestFocusChange()

PreviewKeyUp=Window_PreviewKeyUp

private void Window_PreviewKeyUp(object sender, System.Windows.Input.KeyEventArgs e)
{
   if (e.Key==System.Windows.Input.Key.Back)
    {
       e.Handled = true;
       RequestFocusChange(FocusNavigationDirection.Previous);
    }
}

private static bool RequestFocusChange(FocusNavigationDirection direction)
{
  var focused = Keyboard.FocusedElement as UIElement;
  if (focused != null) return focused.MoveFocus(new TraversalRequest(direction));
  return false;
}

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