Creating a WPF Hybrid Control (TreeView + DataGrid = DataTreeGrid)

Question

I need to create a TreeView that hold synchronized data, like a DataGrid.

To clarify, take a look at this image:

Answer 1

To me this looks like a regular DataGrid with a few Groupings set on it

So in your case you would create a DataGrid that groups on Root, Node #, Node 2nd Number, and Node 3rd Number.

Also flatten your list of NodeData so it is a single list with each item containing properties for Root, NodeLevel1, NodeLevel2, and NodeLevel3