UWP ListView 拖放 [英] UWP ListView Drag and Drop

问题描述

我将从 ListView 中拖出一个项目来放置一个框来处理某些事情.

I am going to drag an item from a ListView to drop a box to process something.

在这种情况下，我无法获得选定的 ListView 项目.选定的索引/项目总是返回 -1/null.

In this case, I am not able to get selected ListView item. Selected Index/Items always returns -1/null.

注意:使用 SelectionChanged 时，我能够获得选定的列表视图项.但无法获得 drop 事件.请指教.

Note: I am able to get selected listview item when using SelectionChanged. But not able to get drop event. Please advise.

XAML 源:

<ListView x:Name="lvMaster" CanDragItems="True" SelectionChanged="lvMaster_SelectionChanged" />

<Grid AllowDrop="True" Drop="Drop_Event" DragOver="DragOver_Event">        
</Grid>

C# 源代码:

private void Drop_Event(object sender, DragEventArgs e)
{
    lvObj = new ListView();
    ListView)sender; 
}

private void DragOver_Event(object sender, DragEventArgs e)
{
    AcceptedOperation = DataPackageOperation.Copy;          
    DragUIOverride.IsCaptionVisible = true;
    DragUIOverride.IsContentVisible = true;
}

推荐答案

您可以注册 DragItemsStarting 事件 或 DragItemsCompleted 事件 用于您的列表视图，然后在其处理程序方法中，您可以获得您拖动的所有项目.

You can register DragItemsStarting event or DragItemsCompleted event for your listview, then in its handler method, you could get all items you dragged.

private void SourceListView_DragItemsCompleted(ListViewBase sender, DragItemsCompletedEventArgs args)
{
    var cc = args.Items;
}

请参考官方拖放示例了解更多详情.

Please refer to the official Drag and Drop sample for more details.

请

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