How to Bind Records From Database by Selected Value of Ddwn

hi Developers ,

i am creating a project now i want to ,

Bind Records From Database by Selected Value of DropDown ,

Without Reload the Page .

when i select the any value of DropDown the Records will automatically bind from Database Without Refresh the Current page using Asp.Net

i am also trying but still i did not get a Exact output.

so if anyone know how to finish this task please suggest me

thanks with

Paul.S