c# - 如何获得目标 ListView 项目？

Question

在 UWP C# 中，我在上排有一个 ListView，在下排有另一个。当我从上部 ListView 拖动一个列表项并将其放在下部 ListView 上时，我正在获取源代码。但是，我无法到达目的地。即)我删除的 ListView 项目/(在我的例子中是文件夹对象)。

<ListView Name="ListviewCars" 
            CanDragItems="True" DragItemsStarting="ListviewCars_DragItemsStarting"     
            SelectionMode="Single" IsItemClickEnabled="True"
            DataContext="Cars"  ItemsSource="{Binding CarsCollection}">

            <ListView.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel  Background="Transparent"  Height="80" Orientation="Horizontal" 
                      HorizontalAlignment="Stretch"  VerticalAlignment="Stretch"  />
                </ItemsPanelTemplate>
            </ListView.ItemsPanel>

            <ListView.ItemTemplate >
                <DataTemplate>
                    <Grid Name="GrdCars" >
                        <Grid Height="80" Width="90" Padding="5">
                            <Grid.Background>
                                <ImageBrush Stretch="Uniform" ImageSource="Assets/car.png"/>
                            </Grid.Background>
                            <TextBlock Text="{Binding Name}" FontWeight="Bold" TextWrapping="Wrap" TextAlignment="Center" 
                                              HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Grid>                        
                    </Grid>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>



        <ListView Name="GrdViewImg"  ScrollViewer.VerticalScrollBarVisibility="Disabled"
            AllowDrop="True" DragOver="Image_DragOver" 
            Drop="Image_OnDrop"
            DataContext="Folders"  ItemsSource="{Binding FolderCollection}">

            <ListView.ItemsPanel>
                <ItemsPanelTemplate>
                    <StackPanel Background="Transparent"  Height="80" Orientation="Horizontal" HorizontalAlignment="Stretch"  VerticalAlignment="Stretch"  />
                </ItemsPanelTemplate>
            </ListView.ItemsPanel>

            <ListView.ItemTemplate >
                <DataTemplate>
                    <Grid Name="GrdForFolderMenu" RightTapped="GrdForFolderMenu_RightTapped">
                        <Grid Height="80" Width="90" Padding="5">
                            <Grid.Background>
                                <ImageBrush Stretch="UniformToFill" ImageSource="Assets/Folderimage.png"/>
                            </Grid.Background>
                            <TextBlock Text="{Binding Name}" FontWeight="Bold" TextWrapping="Wrap" TextAlignment="Center" HorizontalAlignment="Center" VerticalAlignment="Center" />
                        </Grid>                       
                    </Grid>
                </DataTemplate>
            </ListView.ItemTemplate>
        </ListView>

Answer 1

我自己找到了一个简单的解决方案。我从 SoureListView 的 DragItemsStarting 事件中获取源代码。和来自放置在 Target ListView 的 Datatemplate 中的 Grid 的目标项目(如 ashchuk 所提到的)。如下所示。现在一切正常!(汽车是我的源自定义列表项。文件夹是我的目标自定义列表项)

    private void SoureListView_DragItemsStarting(object sender, DragItemsStartingEventArgs e)
    {
        Cars x = e.Items[0] as Cars;
        string DraggedSourceCar = x.Name;
        e.Data.Properties.Add("myArgs", DraggedSourceCar);
    }

    private void GridInsideDatatemplateOfTargetListview_Drop(object sender, DragEventArgs e)
    {
        var x = sender as Grid;
        var y = x.DataContext as Folders;
        string toMoveFolderName = y.Name;

        string DraggedSourceCar = e.DataView.Properties["myArgs"].ToString();
        Debug.WriteLine(DraggedSourceCar + Environment.NewLine + toMoveFolderName );
    }

    private void TargetListview_DragOver(object sender, DragEventArgs e)
    {
        e.AcceptedOperation = DataPackageOperation.Copy;
    }