Asp.net VB Gridview Ajax Load More Feed

Hi, i am a developer and i some asp.net gridviews (vb) that shows data from sql datasource and currently have page number at the end like 1 2 3 4 5 6 etc what i want is instead of selecting page numbers to show more data i want a load more button like twitter or pinterest that shows the data automatically and by a load more button (both options) Thanks this needs to be done in visual basic and asp.net