Question

我正在使用Windows手机上的应用程序。

我有一个TextBox的MenuFlyout。当TextBox处于编辑模式时，如何禁用MenuFlyout？（即当用户点击它并且键盘已启动时）？用户完成编辑后（键盘关闭时）重新启用它。

这是我的xaml代码：

<TextBox x:Name="ListItem" Holding="OnHolding">   
                            <FlyoutBase.AttachedFlyout>
                                <MenuFlyout>
                                    <MenuFlyoutItem x:Uid="DeleteListItemMenuItem"
                                                Command="{Binding MenuCommand}"
                                                CommandParameter="{Binding}" />
                                </MenuFlyout>
                            </FlyoutBase.AttachedFlyout>
                        </TextBox>

这是我背后的代码：

 private void OnListItemHolding(object sender, HoldingRoutedEventArgs args)
        {
            TextBox textBox = sender as TextBox;
            if (textBox == null) return;

            // this event is fired multiple times. We do not want to show the menu twice
            if (args.HoldingState != HoldingState.Started) {
                return;
            }


            // If the menu was attached properly, we just need to call this handy method
            FlyoutBase.ShowAttachedFlyout(textBox );
        }

Answer 1

对我来说有用的是在启动FlyOut之前检查焦点状态

private void TextBox_Holding(object sender, HoldingRoutedEventArgs e)
{           
    if (e.HoldingState == Windows.UI.Input.HoldingState.Completed)
    {
        TextBox tb = sender as TextBox;
        if (tb.FocusState == Windows.UI.Xaml.FocusState.Unfocused)
        {
            FlyoutBase.ShowAttachedFlyout((FrameworkElement)sender);
        }
    }         
}

如果TextBox处于编辑模式，则其FocusState为Windows.UI.Xaml.FocusState.Pointer

如何在编辑模式下禁用TextBox MenuFlyout

1 个答案: