/// <summary>

        /// 数据上下文对象

        /// </summary>

        OumindBlogEntities db = new OumindBlogEntities();

        #region 查询文章列表

        /// <summary>

        /// 查询文章列表

        /// </summary>

        /// <returns></returns>

        public ActionResult Index()

        {   //linq

            List<Models.BlogArticle> list = (from d in db.BlogArticles where d.AIsDel == false select d).ToList();

            //1.2将集合数据传给视图

            ViewBag.DataList = list;

            //ViewData["DataList"] = list;

            return View();

        }

        #endregion

@using MVCBlog.Models

<!--引入命名空间-->

   <table id="tbList">

       <tr>

           <th>id</th>

           <th>标题</th>

           <th>分类</th>

           <th>状态</th>

           <th>时间</th>

           <th>操作</th>

       </tr>

       @foreach (BlogArticle a in ViewBag.DataList as List<BlogArticle>)

       {

           <tr>

              <td>@a.AId</td>

              <td>@a.ATitle</td>

              <td>@a.BlogArticleCate.Name</td>

              <td>@a.Enumeration.e_cname</td>

              <td>@a.AAddtime</td>

              <td>

                <a href="javascript:del(@a.AId)">删除</a>

                <a href="/Home/Modify/@a.AId">修改</a>

              </td>

           </tr>

       }

   </table>

     #region  删除操作

        /// <summary>

        /// 删除操作

        /// </summary>

        /// <param name="id"></param>

        /// <returns></returns>

        public ActionResult Del(int id)

        {

            try

            {

                //1.创建要删除的对象

                BlogArticle modelDel = new BlogArticle { AId = id };

                //2.将对象添加到 EF 管理容器

                db.BlogArticles.Attach(modelDel);

                //3.将对象包装类的状态 标识为 删除状态

                db.BlogArticles.Remove(modelDel);

                //4.更新到数据库

                db.SaveChanges();

                //5.更新成功，则命令浏览器 重定向到 /Home/List 方法

                return RedirectToAction("Index", "Home");

            }

            catch (Exception ex)

            {

                return Content("删除失败~~~" + ex.Message);

            }

        }

        #endregion

         using System.Data.Entity.Infrastructure;
         #region 显示要修改的数据

        /// <summary>

        /// 显示要修改的数据

        /// </summary>

        /// <param name="id"></param>

        /// <returns></returns>

        public ActionResult Modify(int id)

        {

            BlogArticle model = (from a in db.BlogArticles where a.AId == id select a).FirstOrDefault();

            //生成文章分类 下拉框 列表集合 <option value="1">文本</option>

            IEnumerable<SelectListItem> listItem = (from c in db.BlogArticleCates

                                                    where c.IsDel == false

                                                    select c).ToList().Select(c => new SelectListItem { Value=c.Id.ToString(),Text=c.Name});

            //将生成的文章分类 下来框 列表集合 设置给ViewBag

            ViewBag.CateList = listItem;

            //使用View 构造函数，将实体传递给视图上名为Model的属性

            return View(model);

        }

        #endregion

        #region 0.5 执行修改

        [HttpPost]

        /// <summary>

        /// 0.5 执行修改

        /// </summary>

        /// <param name="model"></param>

        /// <returns></returns>

        public ActionResult Modify(BlogArticle model)

        {

            //1.将实体对象a 加入到EF 对象容器中,并 b获取 伪包装类 对象

            DbEntityEntry<BlogArticle> entry = db.Entry<BlogArticle>(model);

            //2.将包装类对象 的状态设置为 Unchanged

            entry.State = System.Data.EntityState.Unchanged;

            //3.设置 被改变的 属性

            entry.Property(a => a.ATitle).IsModified = true;

            entry.Property(a => a.AContent).IsModified = true;

            entry.Property(a => a.ACate).IsModified = true;

            //4.提交到数据库，完成修改

            db.SaveChanges();

            //5.命令 浏览器 重定向 到 Home/List 方法

            return RedirectToAction("Index", "Home");

        }

        #endregion

  @model MVCBlog.Models.BlogArticle

  <!--指定页面Model 属性 的类型-->

  @using(Html.BeginForm("Modify","Home",FormMethod.Post))

   {

    <table id="tbList">

        <tr><td colspan="2">修改:@Html.HiddenFor(a=>a.AId)</td></tr>

        <tr>

            <td>标题：</td>

            <td>@Html.TextBoxFor(a=>a.ATitle)</td>

        </tr>

        <tr>

            <td>分类：</td>

            <!--使用强类型方法生成下拉框，并自动根据 model属性里的ACate值 设置 下拉框的默认选中项-->

            <td>@Html.DropDownListFor(a => a.ACate, ViewBag.CateList as IEnumerable<SelectListItem>)</td>

        </tr>

        <tr>

            <td>内容：</td>

            <td>@Html.TextAreaFor(a=>a.AContent,10,60,null)</td>

        </tr>

        <tr>

            <td colspan="2" ><input  type="submit"  value="确认修改"/>@Html.ActionLink("返回","Index","Home")</td>

        </tr>

    </table>

   }