在列表中拖放，Windows 8应用程序？

Question

Is there any good examples/tutorials on how to implement drag and drop within a window 8 C# list (listview, listbox …) out there?

What I would like Is a editable “Iphone-list”-experience, where I easily can rearrange items within a list. But I mostly find WinJS examples and I would like to have ac# example for win 8

Answer 1

Firstly You must enable the AllowDragDrop property.

Then write 3 events:

    private void myList_ItemDrag(object sender, ItemDragEventArgs e)
    {
        DoDragDrop(e.Item, DragDropEffects.Link);
    }

    private void myList_DragEnter(object sender, DragEventArgs e)
    {
        e.Effect = DragDropEffects.Link;
    }

    private void myList_DragDrop(object sender, DragEventArgs e)
    {
        // do whatever you need to reorder the list.
    }

To get index of dropped item:

Point cp = myList.PointToClient(new Point(e.X, e.Y));
ListViewItem dragToItem = myList.GetItemAt(cp.X, cp.Y);
int dropIndex = dragToItem.Index;

Answer 2

If you need to drop onto a ListView or GridView, have the Drop event fire on the DataTemplate for the actual Item, not the whole list. Then you can tell which item it is dropped on.