<asp:TemplateField HeaderText="View/Edit">
<ItemTemplate>
<asp:HyperLink ID="Hyplapprover" runat="server" NavigateUrl='<%# Eval("req_id", "pagename.aspx?req_id={0}") %>'>View</asp:HyperLink>
</ItemTemplate>
<HeaderStyle Wrap="False" />
</asp:TemplateField>
This Statement will pass the req_id as a querystring value.