As mentioned in the other forum thread, you can bind the listviews using their OnNeedDataSource server event. In it, you can cast sender to RadListView and get its NamingContainer which should be the parent RadListViewDataItem. From it, you can pick the ProductID and use it to query the database, something like:
sender, RadListViewNeedDataSourceEventArgs e)
RadListViewDataItem parentItem = (sender
id = (parentItem.FindControl(
//query db for records having this ID
For this to work, declare an asp:HiddenField bound to the ProductID value.
the Telerik team
If you want to get updates on new releases, tips and tricks and sneak peeks at our product labs directly from the developers working on the RadControls for ASP.NET AJAX, subscribe to their blog feed