Hi Nigel and Filip,
ItemSource binding can be done in DropDownButtonAdv using DropDownMenuGroup. Following code snippets show how ItemsSource binding,
[XAML]
we have attached a sample for your reference.
[Sample Link]
http://www.syncfusion.com/downloads/Support/DirectTrac/86596/dropdownbutton-768362829.zipLet we know if you have any other queries.
Regards,
Karthikeyan.