How to retain the Gridview row data on postback ?,.

Hi,

 

I want to keep the selection of the gridview on the postback.I have multiple pages in gridview, There I can select on any row's value and move to any page index in gridview, in spite of this situation.

 

I have to keep all previously selected value in the gridview.

 

If anyone knows about it suggest me with example code.

 

Thanks in Advance

Karthik K