hello I am making a gridview but I need to know how to make a page indexing

I tried this but doesn´t work, thanks for your help

<asp:GridView ID="dtgBusqueda" runat="server" autogeneratecolumns="False"
AllowPaging ="True" PageSize ="10" PagerStyle-Mode ="NumericPages"
Mode="NumericPages" onpageindexchanging="dtgBusqueda_PageIndexChanging "
onrowcommand="dtgBusqueda_RowCommand" >

well with all due respect I ask for a question only for how I can index data to the datagridview