hi babu
You can try this
<asp:GridView ID="gvCustomers" runat="server" AutoGenerateColumns="false">
<Columns>
<asp:TemplateField>
<ItemTemplate>
<asp:HiddenField ID="hfCompanyID" runat="server" Value='<%#Eval("CompanyID") %>' />
</ItemTemplate>
</asp:TemplateField>
<asp:BoundField DataField="CompanyName" />
</Columns>
</asp:GridView>
There is so many other way to fullfill your requirement.
however this will help you.
For any help revert on the same