The following code demonstrates how to make an UIElement droppable by using the ISDragDrop.AllowDrop attached property.

XAML	Copy Code
<ListBox HorizontalAlignment="Center" Height="100" VerticalAlignment="Center" Width="100" Intersoft:ISDragDrop.AllowDrop="True"> </ListBox>

To make an UIElement droppable, you can choose one of the following approaches:

AllowDrop property is only available in SL4 and WPF.

This approach is only used to mark the UIElement as a droppable element. It does not include built-in handling such as in DropTargetBehavior thus requires you to write additional logic at the Drop event. To learn how to handle Drop event, see How to: Copy the dragged object when dropped to the drop target and How to: Remove the drag object when dropped to drop target.

Since Silverlight 3 does not have AllowDrop property in UIElement, the ISDragDrop.AllowDrop attached property is introduced to maintain code compatibility across Silverlight 3, Silverlight 4 and WPF.

Target Platforms: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 family, Windows Vista, Windows Server 2008 family

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