小巧玲珑直接返回一个子集特定的列到DTO [英] Dapper returning a sub set of specific columns directly into DTO

问题描述

可以直接短小精悍返回数据到一个DTO / POCO，只有具有域的一个子集 - 也就是说，我可以用它不包含在数据库表中的所有列类？

Can Dapper return data directly into a DTO/POCO that only has a subset of fields - ie can I it use classes that do not contain all the columns in the db tables?

例如，如果我有以下查询（原谅我的SQL - 不是我的强项）：

Eg if I have the following query (excuse my sql - not my strong point):

select c.Name as "Customer", o.Number as "OrderNo", ol.Number as "Line", p.Description     as "Product", ol.Qty 
from order o
join customer c on c.Id = o.CustomerId
join orderLine ol on ol.OrderID = o.Id
join product p on p.Id = ol.ProductId
where o.date >= 1/9/2013 and o.date <= 30/9/2013

我如何使用小巧精致的阅读本到一个数组/下面的类的IEnumerable的：

How can I use Dapper to read this into an array/IEnumerable of the following class:

class CustOrders{
  string Customer {get;set;}
  integer Order {get;set;}
  string Line {get;set;}
  string Product {get;set;}
  integer Qty {get; set;} 
}

谢谢 蒂姆·

Thanks Tim

推荐答案

你可以做以下

    var sql  = @"select c.Name as [Customer], o.Number as [Order], ol.Number as [Line], p.Description as [Product], ol.Qty ...";
    var result = connection.Query<CustOrders>(query);

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