Пример #1
0
        private static void Update_5()
        {
            using (var context = new UefaDbContext())
            {
                Console.WriteLine("Update_5 Update properties");
                var teamToUpdate = new Team()
                {
                    Id = 1
                };

                context.Attach(teamToUpdate);
                teamToUpdate.Name = "Shahtar (Updated_5)";

                var country2 = new Country()
                {
                    Id = 2
                };
                context.Attach(country2);

                teamToUpdate.Country = country2;

                context.SaveChanges();
            }
        }
Пример #2
0
        private static void Update_3()
        {
            using (var context = new UefaDbContext())
            {
                Console.WriteLine("Update_3 Explicit property modified");
                var teamToUpdate = new Team()
                {
                    Id      = 1,
                    Country = context.Countries.Find(1),
                    Name    = "Shahtar (Updated_3)"
                };

                context.Attach(teamToUpdate);
                context.Entry(teamToUpdate).Property(t => t.Name).IsModified = true;
                context.SaveChanges();
            }
        }
Пример #3
0
        private static void Update_4()
        {
            using (var context = new UefaDbContext())
            {
                Console.WriteLine("Update_4 Update properties");
                var teamToUpdate = new Team()
                {
                    Id = 1
                };

                context.Attach(teamToUpdate);
                teamToUpdate.Name = "Shahtar (Updated_4)";

                // Cannot insert explicit value for identity column in table 'Countries' when
                // IDENTITY_INSERT is set to OFF.
                var country2 = new Country()
                {
                    Id = 2
                };
                teamToUpdate.Country = country2;

                context.SaveChanges();
            }
        }