<asp:DetailsView EnableViewState="true" ID="dvDettagliUtente" runat="server" 
                                    AutoGenerateRows="False" Width="500px"  OnItemCommand="dvDettagliUtente_ItemCommand"
                                    OnItemUpdating="dvDettagliUtente_ItemUpdating" OnDataBound="dvDettagliUtente_DataBound">
                                    <Fields>
                                    
                                        <asp:TemplateField HeaderText="Nick">
                                                                                       <InsertItemTemplate>
                                                <asp:TextBox runat="server" ID="txtNick" Text="" />
                                                <asp:RequiredFieldValidator ControlToValidate="txtNick" ID="reqINick" runat="server"
                                                    ErrorMessage="Inserire un nick" Text="*" ValidationGroup="vgInsert"></asp:RequiredFieldValidator>
                                            </InsertItemTemplate>
                                        </asp:TemplateField>
                                       

                                        <asp:CommandField ShowInsertButton="True" ValidationGroup="vgInsert" CausesValidation="true"
                                            InsertText="Inserisci" CancelText="Annulla" />
                                    </Fields>
                                </asp:DetailsView>