I have to create the following group of dropwdownlists dynamically each time 'Add' A Program' button is clicked and the data is hierarchical.

This is important that the user IS allowed to add without any limit. The page has the first group in design when first loaded.

How to create them in codes and assign each of these dropwndowns to selectedindex changed event since they have to be tracked hierarchically whenever  the selected data is changed.

Thanks.