Let parent handle the child controls event or command WPF?

I have a user control that has 2 controls A and B within it. Now, A and B have their own logic in their DragDrop event.

The parent that has these 2 controls has to handle the DragDrop from these events in its own way. So I have in the parent something like, parent.A.DragDropEvent += new EventHandler () etc...

Now, I want to handle the DragDrop event of both controls in the parent and NOT let the children handle it themselves. On the other hand, if these controls are used stand- alone(not within the parent control), then I want their own logic to work or take over.

How do I achieve 开发者_高级运维this? thanks!

Add a boolean property like HandleDragDrop to your child controls and let them only handle drag-and-drop if that property is true. Make it true by default. Set it to false in your parent control.

If you wan't the child controls to be just displayed but not interactive in the implementation where they have the parent you could set IsHitTestVisible="false" on them in the xaml where they have the parent and then all interactions would go to the parent.