1.查询
1）Controllers
/// <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
2）View
@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>
2.删除
1）Controllers
#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
3.修改
1)Controller
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
2）View
@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> }