如何在模型中使用mvc3 razor中的dropdownlistfor

Question

我想在dropdownbox的视图中使用以下属性。 我怎么能 ？ 我尝试了很多方法但是 请帮忙

public IEnumerable<SelectListItem> Topic
{
    get
    {
        return  new[]
        {
            new SelectListItem { Value = "1", Text = "Science", Selected=true },
            new SelectListItem { Value = "2", Text = "History" },
            new SelectListItem { Value = "3", Text = "Physics" },
        };
    }
}

Answer 1

您尚未添加观看代码。

基本上您需要在视图中添加@model，如下所示：

@model MySampleApplication.Models.ModelName

然后在你看来你应该像这样访问：

@Html.DropdownListFor(m=>m.Topic, Model.Topic)

来自Scott Allen的

DropDownListFor with ASP.NET MVC

希望有所帮助

---

修改

假设你有这样的模型类：

public class MyModel
{
public IEnumerable<SelectListItem> Topic
{
    get
    {
        return  new[]
        {
            new SelectListItem { Value = "1", Text = "Science", Selected=true },
            new SelectListItem { Value = "2", Text = "History" },
            new SelectListItem { Value = "3", Text = "Physics" },
        };
    }
}
}

试试这样：

public ActionResult Index() 
{
   MyModel model=new MyModel();
   return View(model);
}

Answer 2

试试这个

型号

public SelectList Topic
            {
                get
                {
                    return new SelectList(
                      new List<SelectListItem> {
                      new SelectListItem { Value = "1", Text = "Science", Selected = true },
                      new SelectListItem { Value = "2", Text = "History" },
                      new SelectListItem { Value = "3", Text = "Physics" }
                    },"Value","Text"
                    );
                }
            }


public int selectedType {get;set;}

查看

@Html.DropDownListFor(model => model.selectedType , Model.Topic)