try this
<asp:templatefield>
<itemtemplate>
<asp:label id="hdrStatus" visible="true" runat="server" text=" <%#"P0"+Container.DataItemIndex+1 %>">
</asp:label>
</itemtemplate>
</asp:templatefield>
add this may be you get
what you want.
let me know this will solve your problem or not
Thank you
ChetanV