How to refresh a specific part of a webpage

Question

Hi,

I have a api(asp.net webpage) that takes feeds from a website. then this api(asp.net web page) saves the data in database that is recieved from that website. now the feeds comes after every 3 seconds. so my api(asp.net) page needs to b refresh after 3 seconds in order to revieve the feeds and store it in database. i am using asp.net with c#. can somebody plz tell me what i need to do?