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如何使实体框架中的实体键映射像sql的外键?

c#-3.0 entity-framework visual-studio-2008 asp.net

0

loki · 技术社区 · 16 年前

我尝试在我的实体应用程序上提供实体地图。但我该怎么做呢?我试着做如下:

var test = ( from k in Kartlar where k.Rehber.....

以上代码k(看不到Reber或不工作)如果你是正确的,我可以写k。Rehber.ID号以及其他人。我不会写:

from
 k in
 Kartlar
where
k.Rehber.ID = 123 //assuming that navigation property name is Rehbar and its primary key of Rehbar table is ID
&& k.Kampanya.ID = 345 //assuming that navigation property name is Kampanya and its primary             //key of Kampanya table is ID
&& k.Birim.ID = 567 //assuming that navigation property name is Birim and its primary key of Birim table is ID
select
k

alt text http://img695.imageshack.us/img695/9334/test1f.png

http://i42.tinypic.com/2nqyyc6.png

我有一个表,它包括3个外键字段:

我的桌子:

ID(Pkey)
KampanyaID公司(Fkey)
布里米德(Fkey)
姓名
细节

select * from Kartlar where RehberID=123 and KampanyaID=345 and BrimID=567

但请注意,我看不到RehberID,KampanyaID,BrimID在实体中他们是外键。我应该用实体键,但是怎么用?

1 回复 | 直到 16 年前

1

0

J. Steen 13 年前

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Text;
using System.Data;
using System.Data.Objects;
using System.Data.Objects.DataClasses;
using System.Web.UI.MobileControls;


namespace EfEntity
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if (!IsPostBack)<br>
            {
                gwKampanya.DataSource = Kart(297688, 88689, 68686);
                gwKampanya.DataBind();
            }
        }

        public List<Kartlar> Kart(int RehberID, int KampanyaID, int BrimID)
        {
            List<Kartlar> kartlar;
            using (xyzEntities genSatisctx = new xyzEntities())
            {
                kartlar = (from k in genSatisctx.Kartlar
                           where k.Rehber.ID == RehberID &&
                                 k.Kampanya.ID == KampanyaID &&
                                 k.Birim.ID == BrimID
                           select k).ToList();

                return kartlar;

            }
        }
    }


}