4
    class Person
    {
        Address Addr { get; set; }
        int Age { get; set; }
    }

    class Address 
    {
        string StreetName { get; set; }
        County Cnty { get; set; }
    }

    class County
    {
         string CntyName;
         string CntyCode;
    }

这是我的存储过程,它从数据库中填充数据。

    Create Procedure SpGetAllPersons
    As
    Select CntyName, CntyCode, StreetName, Age from Persons

我试图在简洁的查询下面写,但得到一个异常

    DBConn.Query<County, Address , Person, Person>
    (DomainConstants.SpGetAllPersons,
    (cnty, address, person) =>
    {
            address.Cnty = cnty;
            person.Addr = address;
            return person;
    },
    commandType: CommandType.StoredProcedure,
    splitOn: "StreetName, Age").ToList();

我尝试使用以下概念,但它只返回单个对象。我需要一份人员名单。

     var sql =
    @"select 
        1 as PersonId, 'bob' as Name, 
        2 as AddressId, 'abc street' as Name, 1 as PersonId,
        3 as Id, 'fred' as Name
        ";
                var personWithAddress = connection.Query<Person, Address, Extra, Tuple<Person, Address, Extra>>
                    (sql, (p, a, e) => Tuple.Create(p, a, e), splitOn: "AddressId,Id").First();

提前致谢。

4

2 回答 2

11

感谢马克和鲍勃跳上它。我能够以其他方式解决问题:

    DBConn.Query(DomainConstants.SpGetAllPersons, commandType: CommandType.StoredProcedure)
    .Select(x => new Person
    {
        Addr = new Address
        {
            Cnty = new County
            {
                CntyName = x.CntyName,
                CntyCode = x.CntyCode
            },
            StreetName = x.StreetName
        },
        Age = x.Age
    }).ToList();
于 2011-07-28T23:03:49.273 回答
-1

好吧,在示例中,您只选择了一行,因此不会返回多个。但是,Query<T>返回一个IQueryable<T>. 您正在调用.First(),因此您得到一个结果也就不足为奇了。如果您更改要使用的语句的最后一部分,您.ToList()将获得一个每行一个项目的列表。

于 2011-07-28T07:33:09.820 回答