<tr>
         <td><asp:Label ID="lblid Text='<%# DataBinder.Eval(Container.DataItem, "id") %>' runat="server" /></td>
         <td><%# DataBinder.Eval(Container.DataItem, "desc_1") %></td>
         <td><asp:TextBox id="txtUno" runat="server" OnTextChanged="text_TextChanged" /></td>
         <td><asp:TextBox id="txtDue" runat="server" OnTextChanged="text_TextChanged" /></td>
         <td><asp:Label ID="lblVal" Text='<%# DataBinder.Eval(Container.DataItem, "valore", "c") %>' runat="server" /></td>
  </tr>