[NHibernate]N+1 Select查询问题分析

 1         /// <summary>
 2         /// NHibernateUtil方式，立即加载客户信息及关联的数据
 3         /// </summary>
 4         /// <param name="customerID"></param>
 5         /// <returns></returns>
 6         public Customer GetCustomerByImmediatelyLoadNHibernateUtil(Guid customerID)
 7         {
 8             //获得ISession实例
 9             //通过using的方式将session释放，为了保证是立即加载的数据，而不是延迟加载的
10             //还记得上篇文章中提到的在延迟加载中，在关闭session情况下，再读取数据的时候就会有一个异常信息
11             //忘记的可以再回到上一篇文章进行查看
12             using (ISession session = NHibernateHelper.GetSession())
13             {
14                 Customer customer = session.Get<Customer>(customerID);
15                 //
16                 // 摘要: 
17                 //     Force initialization of a proxy or persistent collection.
18                 //
19                 NHibernate.NHibernateUtil.Initialize(customer.Orders);
20                 return customer;
21             }
22         }

1         protected void btnImmediately_Click(object sender, EventArgs e)
2         {
3             Business.CustomerBusiness customerBusiness = new Business.CustomerBusiness();
4             Customer customer = customerBusiness.GetCustomerByImmediatelyLoadNHibernateUtil(new Guid("B0720295-9541-40B3-9994-610066224DB8"));
5             bool isInitOrder = NHibernate.NHibernateUtil.IsInitialized(customer.Orders);
6         }