Overrides DataBind to create the relationship between the the control identified by the ParentListID property and this control.
Use this method to bind data from a source to a server control. This method is commonly used after retrieving a data set through a database query.
Note When called on a server control, this method resolves all data-binding expressions in the server control and in any of its child controls.
RelationalDropDownList Class | Fusion8Design.WebControls.UI Namespace