Forms Data Controls :: Move To Particular Pageindex In Gridview?

I have one textbox one button and one gridview on my webform, when Page loads all records are displayed on gridview, which works perfectly fine, now,I search particular records by entering id in textbox, which finds particular records and found row's background becomes red.which works perfectly fine too, my gridview's pagesize is 15 which means it display 15 records per page, Now,Problem is when i enter ID textbox to search record,but searched record is on another page,so,I want that When i click button to search, the page must be displayed where searched record exist. It displays first page even after search, How can i move to that page where record exist. what i have to code in click event