在gird选定值中的DropDownListFor不起作用

Question

这是我的代码

ViewBag.Years= new SelectList(new[] 
 { new { ID = "1", Name = "1 Year" }, 
   new { ID = "2", Name = "2 Year" }, 
   new { ID = "3", Name = "3 Year" }, 
 }, "ID", "Name", "");

这里我试图在我的表中为每一行绑定

@for (var i = 0; i < Model.Records.Count; i++ ) 
{ 
  @Html.DropDownListFor(m => Model[i].Years, 
       (SelectList)ViewBag.Years}) 
}

Model [i] .Years为每一行发送不同的值，但仍然没有选择正确的项目。

Answer 1

public class HomeController : Controller
{
    public ActionResult Index()
    {
        ViewBag.Message = "Welcome to ASP.NET MVC!";



        var data = Enumerable.Range(1, 5).Select(a => new myViewModel
        {
            Description ="Description"+a,
            Years =GetYear(a)  
        }).ToList();



        return View(data);
    }

    private List<SelectListItem> GetYear(int a)
    {
        return Enumerable.Range(1, 50).Select(y => new SelectListItem
        {
            Selected = y==a?true:false,
            Text = y + " Year",
            Value =y.ToString()
        }).ToList();
    }

    public ActionResult About()
    {
        return View();
    }
}

 //Model class is bellow
public class myViewModel
{
    public string Description { get; set; }
    public List<SelectListItem> Years { get; set; }
}


Demo :