public bool UpdateListaServicii(string nume, int nr, string an, int code)
        {
            if (code == 0)
                return false;

            using (var context = new ServiciiATMContext())
            {
                using (var transaction = context.Database.BeginTransaction())
                {
                    try
                    {
                        var serv = new Lista_servicii
                        {
                            Nume_serviciu = nume,
                            Nr_componenta = nr,
                            An_studiu = an,

                        };
                        context.Lista_servicii.Add(serv);
                        context.Entry(serv).State = System.Data.Entity.EntityState.Modified;
                        context.SaveChanges();
                        transaction.Commit();
                        return true;
                    }
                    catch (Exception ex)
                    {
                        transaction.Rollback();
                        return false;
                    }
                }
            }
        }
        public bool InsertListaServicii(string nume, int nr_comp, string an, int code)
        {
            if (code == 0)
                return false;
            using (var context = new ServiciiATMContext())
            {
                var lista = new Lista_servicii
                {
                    Nume_serviciu = nume,
                    Nr_componenta = nr_comp,
                    An_studiu = an,
                };
                context.Lista_servicii.Add(lista);
                context.Entry(lista).State = System.Data.Entity.EntityState.Added;
                context.SaveChanges();

                return true;
            }

        }