FOREIGNKEY不是在VS2012 RC被认可 [英] ForeignKey not being recognised in VS2012 RC

问题描述

很多的帮助后，昨天，我想出了反对ASP.NET4测试已知的错误 - 我升级到VS2012 RC防爆preSS（4.5），现在是VS报告在我的模型，这是两个错误OK previously：

after a lot of help yesterday, I came up against a known error in asp.net4 beta - I upgraded to VS2012 RC Express (4.5), and now VS is reporting two errors in my model, which were ok previously:

的类型或命名空间名称ForeignKeyAttribute'找不到（是否缺少using指令或程序集引用？）

"The type or namespace name 'ForeignKeyAttribute' could not be found (are you missing a using directive or an assembly reference?)"

的类型或命名空间名称ForeignKey的'找不到（是否缺少using指令或程序集引用？）

"The type or namespace name 'ForeignKey' could not be found (are you missing a using directive or an assembly reference?)"

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;
using System.Data.Entity.ModelConfiguration.Conventions;
using System.Data.Entity;

namespace MvcApplication6.Models
{
    public class tblRental
    {
        [Key()]
            public int rental_id { get; set; }
        public int room_id { get; set; }
        public DateTime check_in { get; set; }
        public DateTime check_out { get; set; }
        public decimal room_cost { get; set; }
        public long customer_ref { get; set; }
        [ForeignKey("customer_ref")]
        public virtual tblCustomerBooking Customer { get; set; }

    }

    public class tblCustomerBooking
    {
        [Key()]
        public long customer_id { get; set; }
        public string customer_name { get; set; }
        public string customer_email { get; set; }
        public virtual ICollection<tblRental> Rentals { get; set; }
    }

有谁知道，如果ForeignKey的参考已经被改变？

Does anyone know if the ForeignKey reference has been changed?

感谢您的帮助，

标记

推荐答案

我只是想通了，我需要添加：

I just figured out I needed to add:

using System.ComponentModel.DataAnnotations.Schema;

我并不需要移动之前，所以我想ForeignKey的已架构命名空间下移动。

I didn't need to move it before, so I assume ForeignKey has been moved under the schema namespace.

希望这有助于其他人，

谢谢，马克

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