I am using two WebDropDown controls, in one control during the on_load event all the items will be filled and in the second one depending on the selection from first one, i need to get values from a data source and return it to a service, I can do it from a server side but it will reload the entire page, so i thought i can use Ajax model and do it on the client side. What is the best way i can do this, my return values from the service are Dictionary object from C#, i can change this service to return record set or a table if that is better. Any suggestions are greatly appreciated.