Implémentation de code spécifique de la liaison de sélection radio dans la liste déroulante MVC5

[Display(Name = "学历")]
 public ICollection<System.Web.Mvc.SelectListItem> asdflist{ get; set; }  //下拉框的类型

[Display(Name = "学历")]
[Required]
public int asdf { get; set; }    //学历这个字段的属性

[Description("学历")]
[LoginAllowView]
 private List<SelectListItem> bind_Education()
{
     StringBuilder sb = new StringBuilder();
     sb.Append(" select id,name ");
     sb.Append(" from Edu_file ");
     DataTable dt = sqlHelp.getData(sb.ToString());//sqlHelp是已经写好的帮助类,便于数据库的操作
     var factorOptions = dt.AsEnumerable().Select(row => new SelectListItem
      {
        Text = row["name"],
        Value = row["id"]
      }).ToList();
      return factorOptions;
}

[Description("学历")]
[LoginAllowView]
private List<SelectListItem> bind_Education()
{
    List<SelectListItem> listItem = new List<SelectListItem>();
    listItem.Add(new SelectListItem { Text = "本科", Value = "1" });
    listItem.Add(new SelectListItem { Text = "硕士", Value = "2" });
     listItem.Add(new SelectListItem { Text = "博士", Value = "3" });
     return listItem;
 }

[Description("我的学历")]
[UIExceptionResult]
 public ActionResult Edu()
{
    var edu= new EduModel();
    edu.asdflist=bind_Education();  //初始化下拉框的值
    return View(edu);
 }