I should very much like to add a sophisticated drill-down feature to a
grid/table in our ASP.NET web pages (VS 2005), sort of like the funtionality
of the treeview. But I want the presentation to be as with a table with
columns and rows in different style/color for each indented drill-down step
(sub-tables).

An example would be a table of customers, but with a click on the + sign on
the left edge one can view a sub-table with all orders for a single
customer. Next, click on the + sign for a single order to view a new
sub-table containing the items on the order.

Is this possible? And what is the best approach?

Bjorn