插入外键 asp.net mvc

Question

我有 3 个模型

public class UsersModel
    {
        [Key]
        public int UserId { get; set; }

        [Required]
        [StringLength(100, ErrorMessage = "Invalid Name Minimum Length is 5", MinimumLength = 5)]
        public string Name { get; set; }

        //20150090
        public int? student_ID { get; set; }

        [Display(Name = "transcript")]
        public string transcript { get; set; }

        [Required]
        [EmailAddress]
        public string Email { get; set; }

        [Required]
        [StringLength(100, ErrorMessage = "The {0} must be at least {2} characters long.", MinimumLength = 6)]
        [DataType(DataType.Password)]
        [Display(Name = "Password")]
        public string Password { get; set; }

        [DataType(DataType.Password)]
        [Display(Name = "Confirm password")]
        [Compare("Password", ErrorMessage = "The password do not match.")]
        public string ConfirmPassword { get; set; }

        [Required]
        [StringLength(100, ErrorMessage = "Invalid Name Minimum Length is 2", MinimumLength = 2)]
        public string Department { get; set; }

        [Required]
        [Display(Name = "Phone")]
        [DataType(DataType.PhoneNumber,ErrorMessage ="Invalid Phone Number")]
        [Range(999999999, 9999999999)]
        public int Phone { get; set; }

        public int type { get; set; }

    }

学生

 public class StudentsModel
    {
        [Key]
        [Display(Name ="ID")]
        public int StudentID { get; set; }

        [Required]
        public string Name { get; set; }

        [Required]//20150090
        public string student_ID { get; set; }

        [Required]
        [Display(Name = "Skills")]
        public string Skills { get; set; }

        [Required]
        [Display(Name = "Gpa")]
        [Range(1.00, 4.00, ErrorMessage = "It must be in range 0.00 to 4.00 :)")]
        public float Gpa { get; set; }

        [Required]
        [Display(Name = "Leader")]
        public string Leader { get; set; }

        [Required]
        [Display(Name = "transcript")]
        public string transcript { get; set; }

        [ForeignKey("UserId")]
        public int UserId;
        public UsersModel Users { get; set; }

        [ForeignKey("IdeaId")]
        public int? IdeaId;
        public IdeaModel Idea { get; set; }


    }

想法

public class IdeaModel
    {
        [Required]
        [Key]
        public int IdeaId { get; set; }

        [Required]
        public string IdeaName { get; set; }

        [Required]
        public string IdeaDescription { get; set; }

        [Required]
        public string tools { get; set; }

        public int? SetWith { get; set; }

        [Required]
        public int Prof1 { get; set; }

        public int Prof2 { get; set; }

        public int Prof3 { get; set; }
    }

当我向数据库中插入用户和学生以及想法时插入空值的学生模型中的外键这是插入代码我希望学生模型中的外键自动插入使用 usernodel 和 idea 模型中的主键值如何实现？

public ActionResult RegisterLeader(regall reg)
        {
            if (ModelState.IsValid)
            {
                var user= db.Users.Add(reg.users);
                var idea = db.Idea.Add(reg.idea);
                var stu = db.Students.Add(reg.students[0]);

                db.SaveChanges();

                return View("RegisterLeaderPost");
                //return Registerfinish();

            }
}

这个模型有三个模型

 public class regall
    {
        public List<StudentsModel> students { get; set; }
        public UsersModel users { get; set; }
        public IdeaModel idea { get; set; }
    }

Answer 1

您需要设置学生的 Idea 属性，以便 EF 知道建立关系。

reg.students[0].Idea = reg.idea;

插入外键 asp.net mvc

insertion of foreign key asp.net mvc

c#

asp.net

asp.net-mvc

entity-framework

asp.net-mvc-4