WPF Drag-and-Drop between ListBoxes in different UserControls

This is the structure of my application:

• Main Window has two ContentControls
• Each ContentControl has a UserControl
• Each UserControl has a ListBox

So graphically speaking, the user is presented with a Window with two ListBoxes: one with products and the other a shopping cart.

I want to enable drag-and-drop functionality among these two ListBoxes; i.e products can be dragged into the shopping cart.

I have seen examples of drag-and-drop between ListBoxes on the same windo开发者_JAVA百科w. But is it possible to drag and drop between UserControls?

I have looked at an example; is there a simpler way?

I came across a simple drag drop solution in Expression Blend; I tried searching for it, but in vain.

Drag-and-drop using behaviors is very simple. Download this complete implementation and sample and try it out:

• ItemsControl Drag Drop Behavior for WPF

It is not clear what is a problem if you've already seen how to do drag-n-drop between listboxes on the same window. Use this code or tell us what's wrong with it.

The good thing about drag-n-drop functionality is that control which starts DND operation doesn't have to know anything regarding control which accepts DND result.