private void TextBox_PreviewKeyDown(object sender, KeyEventArgs e)
{
TextBox txt = sender as TextBox;
if (txt.Text.Length <= 10) //控制字符长度
{
//屏蔽非法按键
if ((e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9) || e.Key == Key.Decimal || e.Key.ToString() == "Tab")
{
if (txt.Text.Contains(".") && e.Key == Key.Decimal)
{
e.Handled = true;
return;
}
e.Handled = false;
}
else if (((e.Key >= Key.D0 && e.Key <= Key.D9) || e.Key == Key.OemPeriod || e.Key == Key.Back || e.Key == Key.Delete) && e.KeyboardDevice.Modifiers != ModifierKeys.Shift)
{
if (txt.Text.Contains(".") && e.Key == Key.OemPeriod)
{
e.Handled = true;
return;
}
e.Handled = false;
}
else if (e.Key == Key.Enter)
{
TraversalRequest request = new TraversalRequest(FocusNavigationDirection.Next);// MoveFocus takes a TraveralReqest as its argument.
UIElement elementWithFocus = Keyboard.FocusedElement as UIElement;// Gets the element with keyboard focus.
if (elementWithFocus != null)
{
elementWithFocus.MoveFocus(request);// Change keyboard focus.
}
e.Handled = true;
}
else
{
e.Handled = true;
}
}
else if (e.Key == Key.Back)
{
e.Handled = false;
}
else
{
e.Handled = true;
}
}
多谢大神帮助