//事务处理
            using (DbContextTransaction dbTransaction = deliverRepository.EFDb.Database.BeginTransaction())
            {
                try
                {
                    //需要事务处理的逻辑代码


                    //事务提交
                    dbTransaction.Commit();

                }
                catch (Exception ex)
                {
                    dbTransaction.Rollback();
                    throw new Exception(ex.Message);
                }

            }