Binding Childnodes in the nodeexpand event of treeview

[vaichi123]

I am using a thirdparty treeview control on my webpage. I am binding the root nodes in the page_load however I need to bind the child nodes in the nodeexpand event of the treeview, I need to create a datarelation between the parent and the child nodes in order to be able to associate child nodes with the parent nodes. How do i pass the parentnodes to the node expand event and ultimately inside the datarelation. I am getting the child nodes in the dataset by creating a new connection to the database. The parent nodes are coming from a different datasource altogether in the page_load. Is there some other way to bind child nodes to parent nodes?

I want to be able to create a treeview with child nodes binding to the parent nodes. I would like to have any suggestions to make this work.