Entity Framework 第九篇 关于自增列的事务处理

如果一个表带有自增列的，那么在事务处理的过程中，如果抑制了提交，自增的序号就不会得到，如果我们需要得到那怎么办呢？可以临时提交，但是既然提交了就要考虑到事务回滚，否则无法满足数据的一致性

 public bool Add(StationView modelView)
        {
            bool result = false;
            this.DbContext.BeginTransaction();
            try
            {
                Station station = new Station { ShopID = modelView.ShopID, StationNo = modelView.StationNo, IsOccupy = modelView.IsOccupy };
                StationRepository.Insert(station);
                this.DbContext.SaveChanges();

                Device device = new Device
                {
                    StationID = station.StationID,
                    DeviceType = 0,
                    Secret = modelView.Secret,
                    ShopID = modelView.ShopID,
                    IsAvailable = modelView.IsAvailable,
                    OffDate = modelView.OffDate,
                    OnDate = modelView.OnDate,
                    DeviceNo = modelView.DeviceNo
                };
                DeviceRepository.Insert(device);
                this.DbContext.SaveChanges();

                Token token = new Token
                {
                    TokenID = Guid.NewGuid().ToString(),
                    IssueTime = DateTime.Now,
                    InvalidTime = DateTime.Now.AddYears(1000),
                    DeviceID = device.DeviceID,
                    Test=""
                };

                TokenRepository.Insert(token);
                result=this.DbContext.Commit()>0;
            }
            catch
            {
                this.DbContext.Rollback();
            }
            return result;
        }

在插入数据的时候 我们调用了 this.DbContext.SaveChanges();做临时提交，正常情况下，在commit里我们是统一提交的，但是如果在最后才提交，就获取不到自增的序列号

public class MyDbContext : DbContext, ITransaction
    {

        public MyDbContext(string connectionString)
            : base(connectionString)
        {
            // 是否启动延迟加载
            Configuration.LazyLoadingEnabled = false;
            // 是否启动代理
            Configuration.ProxyCreationEnabled = false;
            Configuration.AutoDetectChangesEnabled = false;
            Configuration.ValidateOnSaveEnabled = false;
         
        }

        public void BeginTransaction()
        {
            if (this.Database.CurrentTransaction == null)
            {
                this.Database.BeginTransaction();
            }
            this.IsTransaction = true;
        }

        public int Commit()
        {
            int reault = this.SaveChanges();
            this.IsTransaction = false;
            DbContextTransaction transaction = this.Database.CurrentTransaction;
            if (transaction != null)
            {
                transaction.Commit();
                transaction.Dispose();
                reault += 1;
            }
            return reault;
        }

        public void Rollback()
        {
            this.IsTransaction = false;
            DbContextTransaction transaction = this.Database.CurrentTransaction;
            if (transaction != null)
            {
                transaction.Rollback();
                transaction.Dispose();
            }
        }

        private bool isTransaction = false;


        public bool IsTransaction
        {
            get { return isTransaction; }
            set { this.isTransaction = value; }
        }

       

    }