Hi

I would like to populate a treeview with texts from a collection (of objects Metal I've created). The objects contains several data, where some are texts.
I would like to be able to "sort" this collection in a treeview, where I want to have a couple of root-nodes and under them childnodes. I'll try to explain the structure with this picture:
Code:
 Metals - Metal manufacturer 01 - Steel 01
                                 - Steel 02
        - Metal Manufacturer 02 - Steel 03
                                 - Iron 01
This is supposed to be the treeview.
I could "hardcode" this structure, if I only knew the materials in the collection in advance. But I dont. So I have to iterate through the collection and add Manufacturers (and materials) as I go along.
I haven't been able to do this as of yet.