ASP.NET MVC实现多选下拉框保存并显示

namespace MvcApplication1.Models
{
    public class CarFan
    {
        public int Id { get; set; }
        public string Name { get; set; }
        public string[] SelectedCars { get; set; }
    }
}

namespace MvcApplication1.Models
{
    public class Car
    {
        public int Id { get; set; }
        public string Name { get; set; }
    }
}

using System.Collections.Generic;
using System.Linq;
using System.WEB.Mvc;
using MvcApplication1.Models;

namespace MvcApplication1.Controllers
{
    public class FanController : Controller
    {

        public ActionResult SaveCars()
        {
            var carFan = new CarFan() {Id = 1, Name = "Darren", SelectedCars = {}};
            ViewBag.allcars = GetAllCars();
            return View(carFan);
        }

        [HttpPost]
        public ActionResult SaveCars(CarFan carFan)
        {
            //if (ModelState.IsValid)
            //{
            //    foreach (var item in carFan.SelectedCars)
            //    {
            //        //TODO:把选中的Car的编号和CarFan保存到中间表
            //    }
            //}
            ViewBag.allcars = GetAllCars();
            return View(carFan);
        }

        private IEnumerable<SelectListItem> GetAllCars()
        {
            List<SelectListItem> allCars = new List<SelectListItem>();
            allCars.Add(new SelectListItem() { Value = "1", Text = "奔驰" });
            allCars.Add(new SelectListItem() { Value = "2", Text = "宝马" });
            allCars.Add(new SelectListItem() { Value = "3", Text = "奇瑞" });
            allCars.Add(new SelectListItem() { Value = "4", Text = "比亚迪" });
            allCars.Add(new SelectListItem() { Value = "5", Text = "起亚" });
            allCars.Add(new SelectListItem() { Value = "6", Text = "大众" });
            allCars.Add(new SelectListItem() { Value = "7", Text = "斯柯达" });
            allCars.Add(new SelectListItem() { Value = "8", Text = "丰田" });
            allCars.Add(new SelectListItem() { Value = "9", Text = "本田" });

            return allCars.AsEnumerable();
        }

@model MvcApplication1.Models.CarFan

@{
    ViewBag.Title = "SaveCars";
    Layout = "~/Views/Shared/_Layout.cshtml";
}
<link href="~/Content/chosen.CSS" rel="external nofollow"  rel="stylesheet" />

<h2>@Model.Name 感兴趣的汽车品牌包括：(最多选择2个)</h2>

@using (Html.BeginFORM("SaveCars", "Fan", FormMethod.Post, new {id="editForm"}))
{
    @Html.ListBoxFor(m => m.SelectedCars, (IEnumerable<SelectListItem>)ViewBag.allcars, new {@class="chosen", multiple="multiple", style="width:350px;"}) <br/>
    <input type="submit" value="提交"/>
}


@section scripts
{
    <script src="~/Scripts/chosen.Jquery.min.js"></script>
    <script type="text/javascript">
        $(function() {
            $('.chosen').chosen({
                max_selected_options: 2
            });

            $(".chosen-deselect").chosen(
            {
                allow_single_deselect: true 
            });

            $(".chosen").chosen().change();
            $(".chosen").trigger('liszt:updated');
        });
    </script>
}