It would be very interesting to be able to use the CRUD operations of the DataSource associated with the ListBox, to reflect on the server the changes made to the ListBox widget. CRUD methods are not currently executed after making changes and calling the DataSource sync method.
Hi, Stefan,
The Kendo UI ListBox was designed to give the developer full control over the way the add and remove events are handled.
Have a look at this demo which demonstrates how to update the data source each time the items change:
https://demos.telerik.com/kendo-ui/listbox/drag-and-drop
Kind Regards,
Alex Hajigeorgieva
Progress Telerik