Hello Ravi Kumar,
Please note that Filtering, Autocomplete and Load on Demand are overlapping functionalities.
At first Load on Demand will filter the Items server-side before they are loaded in the control by some criteria - in most cases Items which begin with the entered text are loaded. Then at the client, if Filter is enabled, the loaded Items will be filtered again. In case of a Contains Filter for instance (and StartsWith is the same case) no Items will be removed from the list as they are already matched upon the same criteria (at the server). The AutoComplete filters items at client-side too - when the user types some text in the input field.
So these three features make the same thing – you can simply choose the one that appeals you most and use it.
the Telerik team
Do you want to have your say when we set our development plans?
Do you want to know when a feature you care about is added or when a bug fixed?
Telerik Public Issue Tracking
system and vote to affect the priority of the items