ASP.NET MVC增删改查带图片路径读取

CREATE TABLE [dbo].[users] (
[id] int NOT NULL IDENTITY(1,1) ,
[userName] varchar(50) COLLATE Chinese_PRC_CI_AS NOT NULL ,
[age] int NOT NULL ,
[phono] varchar(200) COLLATE Chinese_PRC_CI_AS NOT NULL ,
CONSTRAINT [PK__users__3213E83F715C1E25] PRIMARY KEY ([id])
)
ON [PRIMARY]
GO

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

namespace mytestDemo.Controllers
{
    public class MyTestController : Controller
    {
        // GET: MyTest
        public ActionResult Index(string selectKey)
        {
            using (mytestEntities db = new mytestEntities())
            {
                //当查询内容是空代表初始加载，查询全部即可。
                if (String.IsNullOrEmpty(selectKey))
                {
                    ViewBag.list = db.users.ToList();
                }
                else {
                    //如果查询内容不为空，则使用模糊查询进行数据筛选
                    ViewBag.list = db.users.Where(o => o.userName.Contains(selectKey)).ToList();
                }
                return View();
            }
        }
        /// <summary>
        /// 添加页面
        /// </summary>
        /// <returns></returns>
        public ActionResult AddInfoPage() {
            return View();
        }
        /// <summary>
        /// 添加函数
        /// </summary>
        /// <param name="users"></param>
        /// <returns></returns>
        public ActionResult AddInfo(users users) {
            using (mytestEntities db = new mytestEntities()) {
                db.users.Add(users);
                db.SaveChanges();
                return Redirect("~/MyTest/Index");
            }
        }
        /// <summary>
        /// 修改
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public ActionResult UpdateById(int id) {
            using (mytestEntities db = new mytestEntities())
            {
                users u=db.users.Where(o => o.id == id).SingleOrDefault();
                u.phono = u.phono=="green.jpg"?"yellow.jpg": (u.phono == "yellow.jpg")?"red.jpg":"green.jpg";
                db.SaveChanges();
                return Redirect("~/MyTest/Index");
            }
        }
        /// <summary>
        /// 删除
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public ActionResult DeleteById(int id)
        {
            using (mytestEntities db = new mytestEntities())
            {
                users u = db.users.Where(o => o.id == id).SingleOrDefault();
                db.users.Remove(u);
                db.SaveChanges();
                return Redirect("~/MyTest/Index");
            }
        }
    }
}

@{
    ViewBag.Title = "Index";
}

<h2>显示页面</h2>
<hr/>
<form action="~/MyTest/Index" method="get">
    <input type="text" name="selectKey" placeholder="请输入搜索内容"/>
    <input type="submit" value="查询" class="btn btn-primary"/>
</form>
<hr/>
<a href="~/MyTest/AddInfoPage">添加</a>
<table class="table table-hover table-bordered">
    <tr>
        <th>编号</th>
        <th>姓名</th>
        <th>年龄</th>
        <th>状态码</th>
        <th>操作</th>
    </tr>
    @foreach (var item in ViewBag.list)
    {
        <tr>
            <td>@item.id</td>
            <td>@item.userName</td>
            <td>@item.age</td>
            <td><img src="~/imgs/@item.phono" style="width:25px;"/></td>
            <td>
                <a href="~/MyTest/UpdateById?id=@item.id" class="btn btn-primary">修改</a>
                <a href="~/MyTest/DeleteById?id=@item.id" onclick="return confirm('是否删除此行?')" class="btn btn-primary">删除</a>
            </td>
        </tr>
    }
</table>

@{
    ViewBag.Title = "AddInfoPage";
}

<h2>添加页面</h2>
<form action="~/MyTest/AddInfo" method="get">
    <input type="text" name="userName" placeholder="请输入用户名" class="form-control" required/>
    <input type="number" name="age" placeholder="请输入年龄" class="form-control" required/>
    <select name="phono" class="form-control" required>
        <option value="green.jpg">green.jpg</option>
        <option value="yellow.jpg">yellow.jpg</option>
        <option value="red.jpg">red.jpg</option>
    </select>
    <input type="submit" value="添加信息" class="btn btn-block btn-primary"/>
</form>