The data of an Ajax bound DropDownList is stored in its DataSource (instance of kendo.data.DataSource). You should obtain a reference to the DataSource via jQuery:
is the ID of the DropDown element, text
are respectively the dataTextField and the dataValueField of the widget.
In case you added a record in the data base and would like to fetch the new data from the server, you need to call the read method of the DataSource. Add method inserts new entry on the client.
Join us on our journey to create the world's most complete HTML 5 UI Framework - download Kendo UI