I have this table structure:
I want to load data from this table into a treeview control, to be able to edit/delete these records.
How to do that?
For more details see: How do you databind to a TreeView control? (the question is WinForms, but still applies to ASP.NET)
The long and short is that you can’t databind to a TreeView. TreeViews are hierarchical data structures and as such do not have a native binding mechanism. You’ll have to roll your own binding to do this.