<asp:TemplateField>
                    <ItemTemplate>
                        <asp:Button ID="btnCancella" runat="server" Text="X" CssClass="Cart_Vista_DEL"  
                            CommandArgument='<%# Eval("ProductId") %>' CommandName='<%#Eval("Colore") %>' OnCommand="btnCancella_Command" />                         
                    </ItemTemplate>
                    <ItemStyle HorizontalAlign="left" Width="26" />
                </asp:TemplateField>