Question

我试图在Customer和MembershipType之间的两个Entity Framework代码优先模型之间创建1：1关系。他们的模型是：

Customer.cs

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;

namespace Vidly.Models
{
    public class Customer
    {
        public int Id { get; set; }

        [Required]
        [StringLength(255)]
        public string Name { get; set; }

        public bool IsSubscribedToNewsletter { get; set; }

        public MembershipType MembershipType { get; set; }

        [Display(Name = "Membership Type")]
        public byte MembershipTypeId { get; set; }

        [Display(Name = "Date of Birth")]
        public DateTime? Birthdate { get; set; }
    }
}

MembershipType.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;

namespace Vidly.Models
{
    public class MembershipType
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public short SignupFee { get; set; }
        public byte DurationInMonths { get; set; }
        public byte DiscountRate { get; set; }
    }
}

当迁移运行时，会产生以下Customer表：

为什么会这样？在尝试使用Html帮助程序创建下拉框时会导致问题，因为当它保存时，它想要将数据放入MembershipTypeId列，但看起来实体实际上正在使用MembershipType_Id列。

Answer 1

您可以尝试使用以下代码：

namespace Vidly.Models
{
    public class Customer
    {
        public int Id { get; set; }

        [Required]
        [StringLength(255)]
        public string Name { get; set; }

        public bool IsSubscribedToNewsletter { get; set; }



        [Display(Name = "Membership Type")]
        public byte MembershipTypeId { get; set; }

        [Display(Name = "Date of Birth")]
        public DateTime? Birthdate { get; set; }


     public virtual  MembershipType MemshipType { get; set; }
    }


    public class MembershipType
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public short SignupFee { get; set; }
        public byte DurationInMonths { get; set; }
        public byte DiscountRate { get; set; }

       public virtual  Customer  customer{ get; set; }
    }

}

如需了解更多信息和其他相关方法，请参阅以下有用链接：http://www.entityframeworktutorial.net/code-first/configure-one-to-one-relationship-in-code-first.aspx

希望它会有所帮助

由于

KARTHIK

在实体框架中创建代码优先1：1关系会产生两个外键字段

1 个答案: