<asp:GridView ID="Gv1" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:GridView ID="gv2" runat="server">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:Label ID="lblVak" runat="server">
</ItemTemplate>
</asp:TemplateField>
<asp:TemplateField>
<FooterTemplate>
<asp:Label ID="lblTotal" runa="server">
</FooterTemplate>
</asp:TemplateField>
</Columns>
</asp:GridView>
</ItemTemplate>
</asp:TemplateField>
</Columns>
</asp:gridveiw>
Seconf Gridview has a footer It shows the row total value.
And the firstgridview footer wil show the whole total of the secondgridview rows