wifitap | wifitap updated for BT5r3

Set IsItemClickEnabled to true on your GridView, and hook into the ItemClick event on the GridView itself. From the event args, you can get the sender (most likely the GridViewItem UI element itself, of which your DataTemplate content is a child), and the ClickedItem, which is the bound datacontext of the datatemplate - in your case the instance of the data:wifiNets - which if your bindings work mean you won't actually have to look in the VisualTree at all.

If for some reason you want to recurse through the VisualChildren for the items of any ItemsControl, use the ContainerFromIndex or ContainerFromItem methods on the ItemsControl to get the ItemContainer hosting each instance of the datatemplate - although I wouldn't recommend doing this unless you really need too. Ideally you shouldn't often have a need for manually trawling the visual tree.