UWP [C ++]右键单击gridview中的项目时如何获取Gridview选择的ItemIndex。

本文介绍了UWP [C ++]右键单击gridview中的项目时如何获取Gridview选择的ItemIndex。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我需要使用下面的XAML获取右键单击/选项卡上所选Gridview项目的索引。

I need to obtain the Index of the selected Gridview item on right click/tab with my XAML below.

我只能在GridView" SelectionChanged"时才能获得索引。但不是"RightTapped"事件。

I was able to get the index only when GridView "SelectionChanged" but not on "RightTapped" event.

有谁能告诉我如何实现这个目标？

Can anyone show me how to achieve this ?

谢谢

XAML：

< GridView的X：名称= QUOT; CustommerGridView" &NBSP ; ItemContainerStyle = QUOT; {StaticResource的GridContainerStyle}" 的SelectionMode = QUOT;单" IsRightTapEnabled = QUOT;真" IsItemClickEnabled = QUOT;真" 的SelectionChanged = QUOT; GridView_SelectionChanged" 项目单击= QUOT; GridView_ItemClick" > < GridView.ItemTemplate>& < DataTemplate>& < Grid RightTapped =" CustomerGridView_RightTapped"宽度= QUOT; 256"高度= QUOT; 130"保证金="5,5,5,5">& < StackPanel Grid.Row =" 0"背景= QUOT;灰色+ QUOT;宽度= QUOT; 256"高度= QUOT; 130"> < Image Source =" Assets / icon.png"宽度= QUOT; 65 QUOT;高度= QUOT; 65 QUOT; /> &NBSP ; < / StackPanel的> &NBSP ; < StackPanel Width =" 256"高度= QUOT; 30英寸;保证金="0,100,0,0"> < TextBlock x：Name =" customerText" Text =" {Binding Customers}" /> &NBSP ; < / StackPanel的> &NBSP ; < / Grid>& < / DataTemplate>& < /GridView.ItemTemplate> < / GridView>

<GridView x:Name="CustommerGridView" ItemContainerStyle="{StaticResource GridContainerStyle}" SelectionMode="Single" IsRightTapEnabled="True" IsItemClickEnabled="True" SelectionChanged="GridView_SelectionChanged" ItemClick="GridView_ItemClick" > <GridView.ItemTemplate> <DataTemplate> <Grid RightTapped="CustomerGridView_RightTapped" Width="256" Height="130" Margin="5,5,5,5"> <StackPanel Grid.Row="0" Background="Gray" Width="256" Height="130"> <Image Source="Assets/icon.png" Width="65" Height="65" /> </StackPanel> <StackPanel Width="256" Height="30" Margin="0,100,0,0"> <TextBlock x:Name="customerText" Text="{Binding Customers}" /> </StackPanel> </Grid> </DataTemplate> </GridView.ItemTemplate> </GridView>

获得带有"SelectionChanged"的索引没问题。

Got the index with "SelectionChanged" no problem.

void MainPage :: GridView_SelectionChanged（Platform :: Object ^ sender， Windows :: UI :: Xaml :: Controls :: SelectionChangedEventArgs ^ e ） { GridView ^ gridview = safe_cast< GridView ^>（发件人）; int SelectedIndex = gridview-> SelectedIndex; }

void MainPage::GridView_SelectionChanged(Platform::Object^ sender, Windows::UI::Xaml::Controls::SelectionChangedEventArgs^ e) { GridView^ gridview = safe_cast<GridView^>(sender); int SelectedIndex = gridview->SelectedIndex; }

但是不知道如何使用"CustomerGridView_RightTapped"获取索引 ？

Butdon't know how to get the Indexwith "CustomerGridView_RightTapped" ?

void MainPage :: CustomerGridView_RightTapped（Platform :: Object ^ sender，Windows :: UI :: Xaml :: Input :: RightTappedRoutedEventArgs ^ e） { Grid ^ grid = safe_cast< Grid ^>（发件人）;

void MainPage::CustomerGridView_RightTapped(Platform::Object^ sender, Windows::UI::Xaml::Input::RightTappedRoutedEventArgs^ e) { Grid^ grid = safe_cast<Grid^>(sender);

//如果我在下面添加会有例外吗？

//Got exception if Iadds below ?

// GridView ^ gridview = safe_cast< GridView ^>（发件人）; // int SelectedIndex = gridview-> SelectedIndex;

//GridView^ gridview = safe_cast<GridView^>(sender); //int SelectedIndex = gridview->SelectedIndex;

推荐答案

嗨dalee，

Hi dalee,

试试这个;

void MainPage::CustomerGridView_RightTapped(Platform::Object^ sender, Windows::UI::Xaml::Input::RightTappedRoutedEventArgs^ e) { Grid^ grid = safe_cast<Grid^>(sender); Object^ dataObject = grid->DataContext; // Data bound to the item // Replace class name "CustomerData" below to the actual class name. auto data = safe_cast<CustomerData^>(dataObject); auto items = safe_cast<Windows::Foundation::Collection::IVector<CustomerData^>^>(CustommerGridView->ItemsSource); // Get index unsigned int SelectedIndex; items->IndexOf(data, &SelectedIndex); }