Displaying many-to-many groupings in WPF

Question

I'm not sure if i'm on the right track with this one, but essentially I'm trying to display a grouped list of items, where each item can be a member of multiple groups. i.e. The two entities are related on a many-to-many basis. I'll try to explain...

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My question is, how do I group items like this into a control? I'm aware of the ICollectionView and the PropertyGroupDescription, but that doesn't seem to serve my purpose here (it seems to only work in a one-to-many scenario).

Any ideas?

Some points to note:

1. When displayed in a list, I want to show all Component's grouped by Kit.
2. When I select a component from this list, I only want that particular instance of the Component (i.e. I want Component + the Kit I selected it from).
3. Ignore the fact that i'm using a TreeView to show the items below, as i'll actually be using a ListBox with a GroupStyle
4. I'm using code-first EF 4.3.1 and the WPF MVVM pattern.

Answer 1

Use the Include() method on the context object to include the related entities.