如何在C＃中使用ASP.NET MVC中的控制器解决集合错误？

Question

我正在使用Visual Studio2012。这是BikeController和Bike模型。 当我运行程序时，错误是“无法使用集合初始化程序初始化类型'MvcApplication3.Models.Bike'，因为它未实现'System.Collections.IEnumerable'。” 错误是在线上的bikes = new Bike {但是当我using System.Collections.IEnumerable;放置时using System.Collections.IEnumerable; 在Bike Model中，它说“使用名称空间指令只能应用于名称空间；'System.Collections.IEnumerable'是类型，而不是名称空间。” 提前致谢。

自行车控制器：

using MvcApplication3.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace MvcApplication3.Controllers
{
    public class BikeController : Controller
    {
        //
        // GET: /Bike/

        Bike bikes;

        public BikeController()
        {
            bikes = new Bike {
                new Bike(),
                new Bike { Manufacturer = "Nishiki", Gears = 5, Frame = "Road" }
            };
        }

        public ActionResult Index()
        {
            return View(this.bikes);
        }

        private ActionResult View(Func<object> func)
        {
            throw new NotImplementedException();
        }

        //
        // GET: /Bike/Details/5

        public ActionResult Details(Bike b)
        {
            return View(b);
        }

        //
        // GET: /Bike/Create

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

        //
        // POST: /Bike/Create

        [HttpPost]
        public ActionResult Create(FormCollection collection)
        {
            try
            {
                // TODO: Add insert logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

        //
        // GET: /Bike/Edit/5

        public ActionResult Edit(int id)
        {
            return View();
        }

        //
        // POST: /Bike/Edit/5

        [HttpPost]
        public ActionResult Edit(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add update logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }

        //
        // GET: /Bike/Delete/5

        public ActionResult Delete(int id)
        {
            return View();
        }

        //
        // POST: /Bike/Delete/5

        [HttpPost]
        public ActionResult Delete(int id, FormCollection collection)
        {
            try
            {
                // TODO: Add delete logic here

                return RedirectToAction("Index");
            }
            catch
            {
                return View();
            }
        }
    }
}

自行车型号：

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Linq;
using System.Web;

namespace MvcApplication3.Models
{
    public class Bike
    {

        public int BikeID { get; set; }
        public string Manufacturer { get; set; }
        public int Gears { get; set; }
        public string Frame { get; set; }

        static protected int bikeCount;

        public Bike()
        {
            this.Manufacturer = "Schwinn";
            this.Gears = 10;
            this.Frame = "Mountain";
            this.BikeID = bikeCount;
            bikeCount++;
        }
    }

}

Answer 1

将您的可变自行车声明为列表

List<Bike> bikes;

然后实例化它

bikes = new List<Bike>() {
                             new Bike(),
                             new Bike() { ... },
                             ...
                         };

Answer 2

像这样初始化控制器：

    public class BikeController : Controller
    {
        //
        // GET: /Bike/

        List<Bike> bikes;

        public BikeController()
        {
           bikes = new List<Bike>() {
               new Bike(),
               new Bike { Manufacturer = "Nishiki", Gears = 5, Frame = "Road" }
           };
        }

        ...
   }

Answer 3

您必须对自行车使用List <>。