<asp:TemplateField>
<ItemTemplate>
<asp:HyperLink ID="lnkSiteName" runat="server"
NavigateUrl='<%# "pagename.aspx?queryStringId=" + DataBinder.Eval(Container.DataItem,"fieldName").ToString()%>'
Text="View">
</asp:HyperLink>
</ItemTemplate>
</asp:TemplateField>
you can use only Eval('fieldName') function instead of DataBinder.Eval(Container.DataItem,"fieldName")DataBinder.Eval