In order to allow me to assist you with this case I will need some more details about your scenario. Could you please share with me some code snippets that demonstrate how you setup RadGridView formatting and filtering. Alternatively, open a new support ticket where you can attach your project. Also, can you please describe in greater detail what is the exact functionality that you are after? Providing us with such will allow us to provide you with adequate support.
I am looking forward to your reply.
the Telerik team