C# 选择RightTapped事件下的ListBoxItem
我现在有以下事件C# 选择RightTapped事件下的ListBoxItem,c#,uwp,C#,Uwp,我现在有以下事件 private void contactGrid_RightTapped(object sender, RightTappedRoutedEventArgs e) { if (contactGrid.SelectedIndex >= 0) { FrameworkElement senderElement = sender as FrameworkElement; MenuFlyout menu
private void contactGrid_RightTapped(object sender, RightTappedRoutedEventArgs e)
{
if (contactGrid.SelectedIndex >= 0)
{
FrameworkElement senderElement = sender as FrameworkElement;
MenuFlyout menu = new MenuFlyout();
MenuFlyoutItem item1 = new MenuFlyoutItem() { Text = "Edit Contact" };
MenuFlyoutItem item2 = new MenuFlyoutItem() { Text = "Comfirm" };
MenuFlyoutSubItem item2a = new MenuFlyoutSubItem() { Text = "Remove Contact" };
item1.Click += new RoutedEventHandler(EditContactClicked);
item2.Click += new RoutedEventHandler(RemoveContactClicked);
item2a.Items.Add(item2);
menu.Items.Add(item1);
menu.Items.Add(item2a);
menu.ShowAt(senderElement, e.GetPosition(contactGrid));
}
}
这可以很好地工作,并在列表框项目顶部的鼠标指针处创建右键单击上下文菜单,但前提是首先选择了它。我不明白的是如何让rightstapped
事件选择右击的项目。我还没有在平板电脑模式和
我目前正在使用鼠标触发右击事件(通过右击)
在平板电脑模式下长按(触发右键点击)是否是默认行为,因此它会选择项目?据我所知,
contactGrid
是您的列表框
?我猜您是否有任何类型的列表
或集合
设置为列表框的项源
?然后,您可以在右击事件中设置SelectedItem
属性,如下所示:
首先需要修改ItemTemplate,以便RightTapped属于ListBoxItem:
<ListBox x:Name="ContactGrid">
<ListBox.ItemTemplate>
<DataTemplate>
<Border Background="Transparent" RightTapped="contactGridItem_RightTapped">
<TextBlock Text="{Binding}" />
</Border>
</DataTemplate>
</ListBox.ItemTemplate>
</ListBox>
(未经测试,但我会这样解决)perfect,正是我所需要的。注意,看起来我需要稍微调整代码以适应工作。尤其是
menu.ShowAt(senderElement,例如GetPosition(contactGrid))代码>需要更改为菜单。ShowAt(发送者作为UIElement,e.GetPosition(发送者作为UIElement))
允许右键单击每次都正确显示,而不是我之前认为的侥幸。
private void contactGridItem_RightTapped(object sender, RightTappedRoutedEventArgs e)
{
FrameworkElement senderElement = sender as FrameworkElement;
// Now you can get the tapped Item from the DataContext and set is as selected
contactGrid.SelectedItem = senderElement.DataContext;
if (contactGrid.SelectedIndex >= 0)
{
MenuFlyout menu = new MenuFlyout();
MenuFlyoutItem item1 = new MenuFlyoutItem() { Text = "Edit Contact" };
MenuFlyoutItem item2 = new MenuFlyoutItem() { Text = "Comfirm" };
MenuFlyoutSubItem item2a = new MenuFlyoutSubItem() { Text = "Remove Contact" };
item1.Click += new RoutedEventHandler(EditContactClicked);
item2.Click += new RoutedEventHandler(RemoveContactClicked);
item2a.Items.Add(item2);
menu.Items.Add(item1);
menu.Items.Add(item2a);
menu.ShowAt(senderElement, e.GetPosition(contactGrid));
}
}