如何在ASP.NET MVC3中创建下拉列表？

Question

我正在尝试基于链接到模型的允许值列表在ASP.NET MVC3视图中创建下拉列表.

到目前为止,在我的模型中,我得到了:

namespace NS 
{
    public class Model
    {
        public Model() 
        {
            Status = new List<SelectListItem>();
            Status.Add(new SelectListItem { Text = "New", Value = "New" });
            Status.Add(new SelectListItem { Text = "PaymentPending", Value = "PaymentPending" });
            Status.Add(new SelectListItem { Text = "PaymentProcessed", Value = "PaymentProcessed" });
            Status.Add(new SelectListItem { Text = "Dispatched", Value = "Dispatched" });
            Status.Add(new SelectListItem { Text = "Complete", Value = "Complete" });
            Status.Add(new SelectListItem { Text = "Cancelled", Value = "Cancelled" });
        }

        public List<SelectListItem> Status { get; set; }
    } // class Model
} // NS

(显然修剪掉了不必要的东西)

然后在我看来,我有:

@model NS.Model
@Html.DropDownListFor(Model.Status)

正如在SO上寻找答案似乎暗示的那样.但是我收到一个错误:

编译器错误消息:CS1501:方法'DropDownListFor'没有重载需要1个参数

任何提示非常感谢.

Answer 1

错误消息非常明显,DropDownListFor帮助器有两个参数.

修改模型以使属性包含所选值

public class Model
{
public Model() {
  Status = new List<SelectListItem>();
  Status.Add(new SelectListItem { Text = "New", Value = "New" });
  Status.Add(new SelectListItem { Text = "PaymentPending", Value = "PaymentPending" });
  Status.Add(new SelectListItem { Text = "PaymentProcessed", Value = "PaymentProcessed" });
  Status.Add(new SelectListItem { Text = "Dispatched", Value = "Dispatched" });
  Status.Add(new SelectListItem { Text = "Complete", Value = "Complete" });
  Status.Add(new SelectListItem { Text = "Cancelled", Value = "Cancelled" });
}
public List<SelectListItem> Status { get; set; }
public string SelectedVal{get;set;}
} 

然后在视图中

@NS.Model
@Html.DropDownListFor(x=> x.SelectedVal, x.Status)