Hi,
1.you have get first time to get all record from table
then set paging in gridview like this
<asp:gridview id="gv_test" gridlines="None" width="100%" runat="server" xmlns:asp="#unknown">
AutoGenerateColumns="false" AllowPaging="true" PageSize="4"
OnPageIndexChanging="gv_test_PageIndexChanging">
<columns>
<asp:boundfield headertext="ID" datafield="ID" headerstyle-horizontalalign="Left">
ItemStyle-HorizontalAlign="Left" HeaderStyle-BackColor="#0F0F0F" ItemStyle-BackColor="#1B1B1B"
ItemStyle-Width="10%" />
</asp:boundfield></columns>
<pagerstyle horizontalalign="Right" />
</asp:gridview>