在创建强类型视图时，获取错误无法确定复合主键

Question

我正在研究ASP.NET-MVC应用程序，我正在尝试从控制器创建强类型视图，但我正在按照错误显示在图中

模型类

public class PropertyRentingApplication
{
     public PropertyRentingApplication() { }


     [Key]
     [Display(Name = "Application ID")]
     public int ApplicationID { get; set; }

     [Key, ForeignKey("PropertyType")]
     [Display(Name = "Property Type ID")]
     [Required(ErrorMessage = "Require Property Type ID")]
     public int PropertyTypeID { get; set; }

     [Key, ForeignKey("Student")]
     [Display(Name = "Student ID")]
     [Required(ErrorMessage = "Require Student ID")]
     public int StudentID { get; set; }

     [Display(Name = "Application Reference")]
     [MaxLength(150)]
     [Required(ErrorMessage = "Application Reference")]
     public string ApplicationReference { get; set; }

     [Display(Name = "Date Of Application")]
     [Required(ErrorMessage = "Require Date of Application Been Submitted")]
     public System.DateTime DateOfApplication { get; set; }

     [Display(Name = "Secure Entire Property")]
     [Required(ErrorMessage = "Require Information on If You Want to Secure Entire Property")]
     public bool SecureEntireProperty { get; set; }

     [Display(Name = "Application Status")]
     [MaxLength(50)]
     [Required(ErrorMessage = "Require Application Status")]
     public string ApplicationStatus { get; set; }

     public PropertyType PropertyType { get; set; }
     public Student Student { get; set; }

}

我已更新如下＆＃34; [列（订单= 1）]＆＃34;但仍然在犯同样的错误

[Key]
     [Display(Name = "Application ID")]
     [Column(Order = 0)]
     public int ApplicationID { get; set; }

     [Key, ForeignKey("PropertyType")]
     [Display(Name = "Property Type ID")]
     [Column(Order = 2)]
     [Required(ErrorMessage = "Require Property Type ID")]
     public int PropertyTypeID { get; set; }

     [Key, ForeignKey("Student")]
     [Display(Name = "Student ID")]
     [Column(Order = 1)]
     [Required(ErrorMessage = "Require Student ID")]
     public int StudentID { get; set; }

Answer 1

您需要使用[Column(Order = 0)]，[Column(Order = 1)]等来装饰关键列，以定义这些列在关键字中的显示顺序