How to allow ComboBoxEdit to select multiple items with the autocomplete feature

By default, ComboBoxEdit allows you to select one item using the autocomplete feature.

This example provides a way to enable the behavior when the autocomplete feature works for multiple item selection.

Firstly, it is necessary to create a ComboBoxEdit descendant and override the CreateEditStrategy method, which should return your own ComboBoxEditStrategy class descendant.

Then, override and implement the ProcessChangeText method, and some more methods to enable item auto-searching selection.

For unimpeded search and selection of items without losing input field focus, the set FocusPopupOnOpen property to False.

UPDATE:  In 15.1, we provided this feature out of the box. Please refer to this thread to get more information: Q561698: Provide ComboBoxEdit incremental search functionality