allowNewItems attribute Specify whether or not users can add to the list of items that appear in the combo box at run-time.

Combo Box for ASP.NET Web Forms - How to add items to an editor on the client in multi-column mode This example demonstrates how to create a multi-column combo box editor and populate it with items on ...

Trying to create a 'form' (Create a Purchase Order) where I have 3 combo boxes. 1.)Supplier 2.)Items 3.) Quantity. Ideally, I ...