我正在使用Windows 10 UWP应用,并在照片应用中遇到了长按菜单,如下所示
有人可以建议如何在Windows 10中创建此类菜单吗?
我检查了 PopupMenu 控件,但它只允许菜单中的6个选项。我想使用C#而非XAML创建此菜单。
答案 0 :(得分:9)
您可以使用Flyout来实现此目的,然后在项目的datatemplate中,定义订阅事件并显示您的菜单。示例可能如下所示:
<ListView>
<ListView.ItemTemplate>
<DataTemplate>
<Grid Holding="Grid_Holding" VerticalAlignment="Stretch">
<FlyoutBase.AttachedFlyout>
<MenuFlyout>
<MenuFlyoutItem x:Name="EditButton" Text="Edit"/>
<MenuFlyoutItem x:Name="DeleteButton" Text="Delete"/>
<MenuFlyoutSubItem Text="OtherItems">
<MenuFlyoutItem Text="Inside1"/>
<MenuFlyoutItem Text="Inside2"/>
<MenuFlyoutItem Text="Inside3"/>
</MenuFlyoutSubItem>
</MenuFlyout>
</FlyoutBase.AttachedFlyout>
<TextBlock Text="{Binding}" VerticalAlignment="Center"/>
</Grid>
</DataTemplate>
</ListView.ItemTemplate>
<x:String>Item 1</x:String>
<x:String>Item 2</x:String>
<x:String>Item 3</x:String>
<x:String>Item 4</x:String>
<x:String>Item 5</x:String>
</ListView>
背后的代码:
private void Grid_Holding(object sender, HoldingRoutedEventArgs e)
{
FrameworkElement senderElement = sender as FrameworkElement;
// If you need the clicked element:
// Item whichOne = senderElement.DataContext as Item;
FlyoutBase flyoutBase = FlyoutBase.GetAttachedFlyout(senderElement);
flyoutBase.ShowAt(senderElement);
}
因此,您应该看到如下图所示的内容。
更多帮助您还可以找到at MSDN。
评论后编辑。
通常,您在XAML中创建的所有内容都可以在后面的代码中创建。如果您想创建 Flyout ,那么它可能如下所示:
private bool startedHolding = false;
private void Grid_Holding(object sender, HoldingRoutedEventArgs e)
{
// simple checkup for holding release for this sample, though this probalby need better handling
startedHolding = !startedHolding;
if (startedHolding)
{
MenuFlyout myFlyout = new MenuFlyout();
MenuFlyoutItem firstItem = new MenuFlyoutItem { Text = "First item" };
MenuFlyoutItem secondItem = new MenuFlyoutItem { Text = "Second item" };
MenuFlyoutSubItem subItem = new MenuFlyoutSubItem { Text = "Other items" };
MenuFlyoutItem item1 = new MenuFlyoutItem { Text = "First sub item" };
MenuFlyoutItem item2 = new MenuFlyoutItem { Text = "Second sub item" };
subItem.Items.Add(item1);
subItem.Items.Add(item2);
myFlyout.Items.Add(firstItem);
myFlyout.Items.Add(secondItem);
myFlyout.Items.Add(subItem);
FrameworkElement senderElement = sender as FrameworkElement;
myFlyout.ShowAt(senderElement);
}
}