Hi
You can you following code to get Parent Row Index on Child Control using
<% int parentRowIndex = Container.DataItemIndex; %>
<asp:Repeater ID="parentRep" runat="Server">
<ItemTemplate>
<%int parentRowIndex = Container.DataItemIndex; %>
<asp:Repeater ID="parentRep" runat="Server">
<ItemTemplate>
<%parentRowIndex %>
</ItemTemplate>
</asp:repeatere>
</ItemTemplate>
</asp:Repeater>
Thanks,
Imdadhusen