我不熟悉 NHibernate 投影。我正在尝试使用它,以便可以返回 List<> 而不是 IList<>。到目前为止,我在向 DTO 投射方面还没有多少运气。我有以下查询和域对象。所以一开始我只是想得到一个给定 EmployeeID 的订单列表。我正在遍历结果列表并将其添加到列表中,因为我希望能够序列化此列表。谁能告诉我Projection离我有多远?我搜索并发现了一些与我自己不相似的示例。基本上..我只想创建一个 DTO 列表。
谢谢!
public List<EmployeeOrder> GetEmployessOrdersDTO(int empid)
{
var emporders = new List<EmployeeOrder>();
ICriteria criteriaSelect = NHibernateSessionManager.Instance.GetSession().CreateCriteria(typeof (Orders))
.CreateCriteria("Employees")
.Add(Expression.Eq("EmployeeID", empid));
criteriaSelect.SetProjection(
Projections.ProjectionList()
.Add(Projections.Property("Products"), "OrderedProducts"));
criteriaSelect.SetResultTransformer(NHibernate.Transform.Transformers.AliasToBean(typeof(EmployeeOrder)));
criteriaSelect.List<EmployeeOrder>();
foreach (var order in emporders)
{
emporders.Add(order);
}
return emporders;
}
订单:
public class Orders
{
public virtual int OrderID { get; private set;}
public virtual string CustomerID { get; set; }
public virtual DateTime OrderDate { get; set; }
public virtual DateTime RequiredDate { get; set; }
public virtual DateTime ShippedDate { get; set; }
public virtual Employees Employee { get; set; }
public virtual IList<Products> Products { get; private set; }
}
雇员:
public class Employees
{
public virtual int EmployeeID { get; private set;}
public virtual string LastName { get; set;}
public virtual string FirstName { get; set;}
public virtual string City { get; set; }
public virtual DateTime HireDate { get; set; }
public virtual string Title { get; set; }
public virtual IList<Orders> Orders { get; private set; }
}
员工订单DTO:
public class EmployeeOrder
{
public virtual string EmployeeName { get; set; }
public virtual string EmployeeTitle { get; set; }
public virtual DateTime RequiredDate { get; set; }
public virtual List<Products> OrderedProducts { get; set; }
}