Hi Domenico,
Sorry for the delay in getting back to you.
I have prepared a sample that meets some of your requirement that you have mentioned in your first post.
1. Gets data required to create nodes from SQL.
2. Position nodes with a top down diagram structure using DirectedTreeLayout Manager.
3. You can drill down a level by means of double clicking it.
4. I have a separate class "Employee", and this acts as a interface between the nodes and database.
I will modify my sample further to use a custom symbol that shows the properties of Employee class in the property editor for a node.
However a symbol designed using SymbolDesigner cannot be made to have custom properties and hence we need to derive existing class as in "CustomSymbols" demo.
Regards,
Dinesh
Diagram_WF_DT_e45fed47.zip