Showing only selected Nodes

[Simon Allport]

Hi,
I am trying to build a  tree view and it works fine with just a normal datatable bound to it and shows everything. But I want to be able to pass a value such as '3' to the parent value and then for the treeview to show me all the child records under 3 and also all there  grandchildren.


ID        ParentID
1            Null
2             1
3             1
4             3
5             3
6             4
7             6  
8             5

I hope that makes sense


Thanks

Simon