persistedselection property for a gridview control in asp

You can specify how row selection is persisted when the GridView control is in paging mode. By default, row selection is persisted by row index. For example, if the second row in a page is selected, the second row in all pages will be selected.

Alternatively, you can specify that row selection is persisted by data-row key. In that case, when a row is selected, rows in other pages are not selected. To enable this functionality, set the EnablePersistedSelection property to true as shown in the following example:

<asp:GridView id="GridView1" runat="server" PersistedSelection="true">
</asp:GridView>