如何通过在wpf中按退格键来关注texbox

本文介绍了如何通过在wpf中按退格键来关注texbox的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

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

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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