Adding items to a TableSection dynamically at run-time?

I'd like to use the top half of a TableView as the input form and the bottom half as the output. I can add items to a TableSection under WP8, but when I try to do the same in iOS and Android, the items don't show up. My first attempt to solve this problem was to add a ListView inside the output TableSection, but no items show up in that list for any OS. Can I show items in a TableView dynamically at run-time? Thanks.