Hello,
In "filter" mode the DropDownList
will keep the selected value. Once the filter is cleared (on popup open), however,
the selected data should be returned.
One possible option to do that is to send the selected value along with the filter text to the server. Thus you will be able to find the selected data item and return it with the filter result. To do that you will need to use DataSource.Read callback, as it is shown in our cascading online demo:
http://demos.telerik.com/aspnet-mvc/dropdownlist/cascadingdropdownlist
(notice the Data callback)
The code for your case should like something like this:
Back on the server, you will get the selected value like this:
(choose the correct type of the selectedValue argument).
Regards,
Georgi Krustev
Telerik by Progress