NHibernate 中事务的使用方法

 public virtual int InsertEmployeeInfoByImport(EmployeeInfo info, PersonInfo person, CorporationSaveCountInfo count)
        {
            using (ISession session = OpenSession())
            {
                ITransaction tx = null;//创建一个事务
                try
                {
                    tx = session.BeginTransaction();//ISession开始事务
//事务中处理的一系列业务
                    info.ID = (int)session.Save(info);
                    //回写明细档
                    person.EmpID = info.ID;
                    person.WorkCode = info.WorkCode;
                    person.ID = (int)session.Save(person);
                    info.PersonID = person.ID;
                    session.Update(info);
                    //UpdateEmployeeInfo(info);
                    //UpdatePerson(person);                    
                    session.Update(count);
                    tx.Commit();//提交事务
                }
                catch (Exception ex)
                {
                    if (tx != null)
                        tx.Rollback();//发生异常，回滚事务，保证了数据的一致性
                    throw ex;
                }
                return info.ID;
            }
        }

 public virtual int InsertEmployeeInfoByImport(EmployeeInfo info, PersonInfo person, CorporationSaveCountInfo count)
        {
            using (ISession session = OpenSession())
            {
                ITransaction tx = null;
                try
                {
                    tx = session.BeginTransaction();
                    info.ID = (int)session.Save(info);
                    //回写明细档
                    person.EmpID = info.ID;
                    person.WorkCode = info.WorkCode;
                    person.ID = (int)session.Save(person);
                    info.PersonID = person.ID;
                    session.Update(info);
                    //UpdateEmployeeInfo(info);
                    //UpdatePerson(person);                    
                    session.Update(count);
                    tx.Commit();
                }
                catch (Exception ex)
                {
                    if (tx != null)
                        tx.Rollback();
                    throw ex;
                }
                return info.ID;
            }
        }