Add More Data to Listview on Click show button

Hi,

I want to show 10 rows in listview on page load and at bottom of listview search result, a linkbutton indicating there are more rows as per this search criteria. 

If user click this linkbutton next 10 rows will be shown with addition of first 10 result that means listview show 20 result. Now If there are more result linkbutton will display show more else linkbutton will be hide.

I am able to bind 10 rows on listview but when I click on linkbutton next page with only 10 rows is shown , it doesn't display 20 result on same page. How I can handle this , I also tried with this link that show data on scroll but unable to do. 

http://aspsnippets.com/Articles/Load-data-while-Scrolling-Page-down-with-jQuery-AJAX-and-ASPNet.aspx