Question

我有一个带有拖放选项的列表视图到文本框。我需要禁用在列表框中使用 CTRL + C 或 CTRL + X 的功能。我不希望它被键盘触发。是否可以选择在WPF中阻止它？

  <ListBox  x:Name="Lst" IsSelected="False"  Height="115" Width="150" ItemsSource="{Binding UsCollectionView}" 
             SelectionChanged="listbox_SelectionChanged" AllowDrop="True" PreviewDrop="ListBox_PreviewDrop" 
    </ListBox>


private void listbox_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
    if (sender is ListBox)
    {
        var listBox = sender as ListBox;
        if (e.AddedItems.Count == 1)
        {
            if (listBox.SelectedItem != null)
            {
                var mySelectedItem = listBox.SelectedItem as User;
                if (mySelectedItem != null)
                {
                    DragDrop.DoDragDrop(listBox, mySelectedItem.Name, DragDropEffects.Copy | DragDropEffects.Move);
                }
            }
        }
    }

}

Answer 1

有很多方法可以做到这一点。一种方法是处理UIElement.PreviewKeyDown Event，检测相关密钥，然后将e.Handled属性设置为true：

private void ListBoxPreviewKeyDown(object sender, KeyEventArgs e)
{
    if ((Keyboard.Modifiers & ModifierKeys.Control) == ModifierKeys.Control)
    {
        // Ctrl Key is pressed
        if (e.Key == Key.C || e.Key == Key.X) e.Handled = true;
    }
}

禁用列表框CTRL + C＆amp; D＆amp; D中的CTRL + X.

1 个答案: