C# 数据绑定：'；System.Web.Mvc.SelectListItem'；不包含名为'；学生ID'；

我拥有以下实体：

public partial class Enrollments
{
  [Key]
  public int ID { get; set; }
  public int RegistrationID { get; set; }
  public int ModuleID { get; set; }

  [DisplayFormat(DataFormatString = "{0:dd/MM/yyyy}", ApplyFormatInEditMode = true)]
  [Display(Name = "Enrollment Date")]
  public Nullable<System.DateTime> EnrollmentDate { get; set; }

  [Display(Name = "Price Agreed")]
  public Nullable<decimal> PriceAgreed { get; set; }
  public Nullable<decimal> Grade { get; set; }

  [NotMapped]
  public virtual Modules Modules { get; set; }
  [NotMapped]
  public virtual Registrations Registrations { get; set; }

  [NotMapped]
  [Display(Name = "Student")]
  public virtual String StudentName { get; set; }
  [NotMapped]
  public virtual int StudentID { get; set; }
  [NotMapped]
  [Display(Name = "Course")]
  public virtual String CourseName { get; set; }
  [NotMapped]
  public virtual int CourseID { get; set; }
  [NotMapped]
  [Display(Name = "Module")]
  public virtual String ModuleName { get; set; }
}

我认为：

<div class="form-group">
  @Html.LabelFor(model => model.StudentName, htmlAttributes: new { @class = "control-label col-md-2" })
  <div class="col-md-10">
    @Html.DropDownListFor(model => model.StudentID, (SelectList)ViewBag.StudentNames, new { htmlAttributes = new { @class = "form-control" } })
  </div>
</div>

@LabelFor（model=>model.StudentName，htmlAttributes:new{@class=“controllabel col-md-2”}）
@DropDownListFor（model=>model.StudentID，（SelectList）ViewBag.StudentNames，new{htmlAttributes=new{@class=“form control”}）

我收到以下错误：数据绑定：“System.Web.Mvc.SelectListItem”不包含名为“StudentID”的属性

---

我已经检查了许多其他类似的问题，事实上，这段代码基于其中一个答案，但仍然会出现错误。

之所以出现此错误，是因为SelectListItem实际上没有属性StudentyID。 将初始化更改为

ViewBag.StudentNames = new SelectList(db.Students.Select(x =>
                    new SelectListItem
                    { 
                        Value = x.ID.ToString(),
                        Text = x.StudentName
                    }),
                "Value",
                "Text"); 

还是像这样

ViewBag.StudentNames = new SelectList(db.Students.Select(x =>
                    new
                    { 
                        StudentID = x.ID.ToString(),
                        StudentName = x.StudentName
                    }),
                "StudentID",
                "StudentName");

---

@谢谢你。。。这是我正在寻找的第二种语法。第一种语法是毫无意义的额外开销-它从第一种语法创建了第二种相同的

IEnumerable

-它只是

ViewBag.StudentNames=db.Students.Select（x=>new-SelectListItem{Value=x.ID.ToString（），Text=x.StudentName}）
ViewBag.StudentNames = new SelectList(db.Students.Select(x =>
                    new
                    { 
                        StudentID = x.ID.ToString(),
                        StudentName = x.StudentName
                    }),
                "StudentID",
                "StudentName");