The DevExpress ASP.NET MVC List Box editor allows multiple list items to be selected at the same time. Selection behavior is controlled by the editor's Properties.SelectionMode property. The following selection modes are available within the ListBox editor:
When multiple selection is enabled, the selection state of individual items can be specified via the Selected property of the item, and a collection of selected items can be obtained by using the GetSelectedValues static method. In addition, item selection can be applied on the client side by using a specific client API (the editor's GetSelectedItems, SelectItems, and UnselectItems client methods).
Note that in multiple selection mode, all the ListBox features are supported, with the exception of loading items on demand via callbacks.