c# - 如何将 ContextFlyout 与 ListView 一起使用？

Question

我正在尝试将 MenuFlyout 添加到我的 UWP 应用程序以支持 Controller 。问题是我不知道如何确定哪个 ListViewItem 实际触发了事件。

代码隐藏

public sealed partial class MainPage : Page
{
    public MainPage()
    {
        this.InitializeComponent();

        this.DataContext = new List<String>{ "Item 1", "Item 2", "Item 3"};
    }

    private void ChoiceA_Click(object sender, RoutedEventArgs e)
    {
        // What was clicked?
    }
}

XAML

<ListView ItemsSource="{Binding}">
        <ListView.ItemContainerStyle>
            <Style TargetType="ListViewItem">
                <Setter Property="ContextFlyout">
                    <Setter.Value>
                        <MenuFlyout>
                            <MenuFlyoutItem Text="Choice A" Click="ChoiceA_Click" />
                            <MenuFlyoutItem Text="Choice B" />
                        </MenuFlyout>
                    </Setter.Value>
                </Setter>
            </Style>
        </ListView.ItemContainerStyle>
    </ListView>

Answer 1

我刚刚用本地机器和移动模拟器测试了你的代码，你的 MenuFlyout 只能在 PC 上通过右键点击 ListView 来显示，这是一个解决方案，你可以在ListView的RightTapped事件中找到OriginalSource，然后得到这个OriginalSource的DataContext 例如这样:

private FrameworkElement originalSource;
private void ChoiceA_Click(object sender, RoutedEventArgs e)
{
    var itemdatacontext = originalSource.DataContext;
}

private void ListView_RightTapped(object sender, RightTappedRoutedEventArgs e)
{
    originalSource = (FrameworkElement)e.OriginalSource;
}