of course, try something like<ASP:DataGrid id="MyDataGrid" runat="server"
.....
      AutoGenerateColumns="false"
    >      <Columns>
          <asp:TemplateColumn HeaderText="au_lname" SortExpression="au_lname">
          <ItemTemplate>
            <input type="hidden" runat="server" value='<%# DataBinder.Eval(Container.DataItem, "au_lname") %>'/>
          </ItemTemplate>
        </asp:TemplateColumn>
</Columns>
</ASP:DataGrid>