地图SQL查询到NHibernate的业务对象 [英] Map SQL Query to Business object in Nhibernate

问题描述

我要地图的SQL查询业务对象使用 NHibernate的。有在Employee表许多领域，但我只得到三要映射只有那些之一。

I want to map SQL query to Business object using Nhibernate. There are lot fields in Employee table, but I am getting three only and want map only those one.

这是我的SQL查询

<sql-query  name="findEmployeesInfo">
<return alias="emp" class="Calibr.BusinessDocuments.BOs.Employee, BusinessDocuments"/>
<![CDATA[
  select (emp.Eid) as {emp.Id},(emp.FirstName) as {emp.FirstName},(emp.LastName) as {emp.LastName} from Employee emp
 ]]>
</sql-query>

这是我必须做的构造那些​​列映射

here is I have make constructor to map those columns

public Employee(int Id, string FirstName, string LastName)
{
    this.Id = Id;
    this.FirstName = FirstName;
    this.LastName = LastName;            
}

DB Employee表列名称：开斋节，名字，姓氏，............

DB Employee table Column Names: Eid, FirstName,LastName,............

我得到这个例外

无法执行查询
  [选择（emp.Eid）为Eid1_0 _（emp.F​​irstName）为FirstName1_0 _（emp.LastName）作为LastName1_0_从员工EMP

could not execute query [ select (emp.Eid) as Eid1_0_,(emp.FirstName) as FirstName1_0_,(emp.LastName) as LastName1_0_ from Employee emp

编辑：如果我选择所有列，它的工作完美 - SELECT * FROM员工EMP

if I select all columns, it will work perfect -- Select * from Employee emp

感谢您的帮助。

推荐答案

我想你会使用受益NHibernate的<一个href=\"http://lostechies.com/jimmybogard/2010/06/30/ad-hoc-mapping-with-nhibernate/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%253A%20LosTechies%20%2528LosTechies%2529\"相对=nofollow>特设映射特点：

I think you would benefit from using NHibernate's ad-hoc mapping features:

命名查询：

<?xml version="1.0" encoding="utf-8" ?>
<hibernate-mapping xmlns="urn:nhibernate-mapping-2.2">
    <sql-query name="findEmployeesInfo">
      select emp.Eid as Id, emp.FirstName FirstName, emp.LastName as LastName from Employee emp
    </sql-query>
</hibernate-mapping>

Employee类：

public class Employee
{
    public int Id { get; set; }
    public string FirstName { get; set; }
    public string LastName { get; set; }
    // etc...
}

即席查询：

IList<Employee> employees = session
                              .GetNamedQuery("findEmployeesInfo")
                              .SetResultTransformer(Transformers.AliasToBean(typeof(Employee)))
                              .List<Employee>();

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