The ASPxDropDownEdit represents an editor containing an edit box to display the editor value (defined via the Text property)
and a specific button, which opens a dropdown window whose content can be templated (using the DropDownWindowTemplate property).
The main purpose of the ASPxDropDownEdit is that it allows you to define its value based upon the value(s) of another control(s)
integrated into the editor's DropDownWindowTemplate.
In this demo, an ASPxGridView control is placed into the ASPxDropDownEdit's dropdown window template, and a click on a
row within the grid changes the editor's value. A specific client API exposed by the ASPxDropDownEdit is used in this demo to
assign a value to the editor (the SetText method), and manipulate the editor's dropdown window (the HideDropDown and