EF4.4增删改查实例
第一、先创建一个名为Store数据库，将下面脚本代码执行创建表；
USE [Store] GO /****** Object: Table [dbo].[Category] Script Date: 03/25/2014 09:39:23 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Category]( [CategoryID] [int] IDENTITY(1,1) NOT NULL, [Name] [nvarchar](50) NULL, CONSTRAINT [PK_Category] PRIMARY KEY CLUSTERED ( [CategoryID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO /****** Object: Table [dbo].[Product] Script Date: 03/25/2014 09:39:31 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[Product]( [ID] [int] IDENTITY(1,1) NOT NULL, [Name] [nvarchar](50) NULL, [CategoryID] [int] NULL, [UnitPrice] [decimal](18, 2) NULL, [UnitsInStock] [int] NULL, CONSTRAINT [PK_Product] PRIMARY KEY CLUSTERED ( [ID] ASC )WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY] ) ON [PRIMARY] GO
第二、控制器ProductController
// // GET: /Product/ public ActionResult Index() { var products = db.Products; return View(products.ToList()); } /// <summary> // GET: /Products/Details/5 /// </summary> /// <param name="id"></param> /// <returns></returns> public ActionResult Details(int id = 0) { var product = db.Products.First(p => p.ID == id); if (product == null) return HttpNotFound(); return View(product); } // // GET: /Products/Create public ActionResult Create() { ViewBag.CategoryID = new SelectList(db.Categories, "CategoryID", "Name"); return View(); } // // POST: /Products/Create [HttpPost] public ActionResult Create(Product product) { if (ModelState.IsValid) { db.AddToProducts(product); db.SaveChanges(); return RedirectToAction("Index"); } ViewBag.CategoryID = new SelectList(db.Categories, "CategoryID", "Name", product.CategoryID); return View(product); } // //GET: /Products/Edit/5 public ActionResult Edit(int id = 0) { Product entity = db.Products.First(p => p.ID == id); if (entity == null) return HttpNotFound(); ViewBag.CategoryID = new SelectList(db.Categories.ToList(), "CategoryID", "Name", entity.CategoryID); return View(entity); } // //POST: /Products/Edit/5 [HttpPost] public ActionResult Edit(Product product) { if (ModelState.IsValid) { db.CreateObjectSet<Product>().Attach(product); db.ObjectStateManager.ChangeObjectState(product, EntityState.Modified); db.SaveChanges(); return RedirectToAction("Index"); } ViewBag.CategoryID = new SelectList(db.Categories.ToList(), "CategoryID", "Name", product.CategoryID); return View(product); } // // GET: /Products/Delete/5 public ActionResult Delete(int id = 0) { Product product = db.Products.First(p => p.ID == id); if (product == null) { return HttpNotFound(); } return View(product); } // // POST: /Products/Delete/5 [HttpPost, ActionName("Delete")] public ActionResult DeleteConfirmed(int id) { Product product = db.Products.First(p => p.ID == id); db.CreateObjectSet<Product>().Attach(product); db.ObjectStateManager.ChangeObjectState(product, EntityState.Deleted); db.SaveChanges(); return RedirectToAction("Index"); }
第3、视图
视图结构：
下面是视图代码：
Index：
@model IEnumerable<TMVC.DAL.Product> @{ ViewBag.Title = "Index"; } <h2> 产品页面</h2> <p>@Html.ActionLink("添加", "Create")</p> <table> <tr> @*<th>@Html.DisplayNameFor(model => model.Name) </th> <th>@Html.DisplayNameFor(model => model.CategoryID) </th> <th>@Html.DisplayNameFor(model => model.UnitPrice) </th> <th>@Html.DisplayNameFor(model => model.UnitsInStock) </th>*@ <th> 名称 </th> <th> 类别 </th> <th> 价格 </th> <th> 库存 </th> <th> 编辑 </th> </tr> @foreach (var item in Model) { <tr> <td>@Html.DisplayFor(mi => item.Name) </td> <td>@Html.DisplayFor(mi => item.CategoryID) </td> <td>@Html.DisplayFor(mi => item.UnitPrice) </td> <td>@Html.DisplayFor(mi => item.UnitsInStock) </td> <td>@Html.ActionLink("编辑", "Edit", new { id = item.ID }) | @Html.ActionLink("详细", "Details", new { id = item.ID }) | @Html.ActionLink("删除", "Delete", new { id = item.ID }) </td> </tr> } </table>
Create：
@model TMVC.DAL.Product @{ ViewBag.Title = "Create"; } <h2> 添加</h2> @using (Html.BeginForm()) { @Html.ValidationSummary(true); <fieldset> <legend>产品</legend> <div class="editor-label"> 名称 @* @Html.LabelFor(model => model.Name)*@ </div> <div class="editor-field"> @Html.EditorFor(model => model.Name) @Html.ValidationMessageFor(model => model.Name) </div> <div class="editor-label"> 类别 @* @Html.LabelFor(model => model.CategoryID, "CategoryPCategor")*@ </div> <div class="editor-field"> @*@Html.DropDownList("CategoryID", String.Empty)*@ @Html.EditorFor(model => model.CategoryID) @Html.ValidationMessageFor(model => model.CategoryID) </div> <div class="editor-label"> 价格 @*@Html.LabelFor(model => model.UnitPrice)*@ </div> <div class="editor-field"> @Html.EditorFor(model => model.UnitPrice) @Html.ValidationMessageFor(model => model.UnitPrice) </div> <div class="editor-label"> 库存@* @Html.LabelFor(model => model.UnitsInStock)*@ </div> <div class="editor-field"> @Html.EditorFor(model => model.UnitsInStock) @Html.ValidationMessageFor(model => model.UnitsInStock) </div> <p> <input type="submit" value="确定添加" /> </p> </fieldset> }
Delete：
@model TMVC.DAL.Product @{ ViewBag.Title = "Delete"; } <h2> 删除</h2> <h3> 你确定要删除这个产品吗？</h3> <fieldset> <legend>产品</legend> <div class="display-label"> 名称 </div> <div class="display-field"> @Html.DisplayFor(model => model.Name) </div> <div class="display-label"> 类别 </div> <div class="display-field"> @Html.DisplayFor(model => model.Name) </div> <div class="display-label"> 价格 </div> <div class="display-field"> @Html.DisplayFor(model => model.UnitPrice) </div> <div class="display-label"> 库存 </div> <div class="display-field"> @Html.DisplayFor(model => model.UnitsInStock) </div> </fieldset> @using (Html.BeginForm()) { <p> <input type="submit" value="删除" /> | @Html.ActionLink("返回产品列表", "Index") </p> }
Details：
@model TMVC.DAL.Product @{ ViewBag.Title = "Details"; } <h2> 详细</h2> <fieldset> <legend>产品</legend> <p> 名称：@Html.DisplayFor(model => model.Name)</p> <p> 类别：@Html.DisplayFor(model => model.CategoryID)</p> <p> 价格：@Html.DisplayFor(model => model.UnitPrice)</p> <p> 库存：@Html.DisplayFor(model => model.UnitsInStock)</p> </fieldset> <p>@Html.ActionLink("编辑", "Edit", new { id = Model.ID }) | @Html.ActionLink("返回", "Index")</p>
Edit:
@model TMVC.DAL.Product @{ ViewBag.Title = "Edit"; } <h2> 编辑</h2> @using (Html.BeginForm()) { @Html.ValidationSummary(true) <fieldset> <legend>产品</legend> @Html.HiddenFor(model => model.ID) <div class="editor-label"> 名称 </div> <div class="editor-field"> @Html.EditorFor(model => model.Name) @Html.ValidationMessageFor(model => model.Name) </div> <div class="editor-label"> 类别 </div> <div class="editor-field"> @*@Html.DropDownList("CategoryID", String.Empty)*@ @Html.EditorFor(model => model.CategoryID) @Html.ValidationMessageFor(model => model.CategoryID) </div> <div class="editor-label"> 价格 </div> <div class="editor-field"> @Html.EditorFor(model => model.UnitPrice) @Html.ValidationMessageFor(model => model.UnitPrice) </div> <div class="editor-label"> 库存 </div> <div class="editor-field"> @Html.EditorFor(model => model.UnitsInStock) @Html.ValidationMessageFor(model => model.UnitsInStock) </div> <p> <input type="submit" value="保存" /> </p> </fieldset> } <div> @Html.ActionLink("返回产品列表", "Index") </div>
RouteConfig
routes.MapRoute( name: "Default", url: "{controller}/{action}/{id}", defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional } );