本人亲身使用EF CodeFirst，因为增删改查都是使用EF内置的一些方法，我想把它封装到一个类调用就行了。结合网上的资料和自己的整理，若有不对的地方望斧正，感激不尽。直接上代码吧。我就用新闻的增删改查做例子。
这是项目的整个结构图：
Views文件夹的文件
1.先看Index.cshtml页面的代码把
Index.cshtml(列表页面)
@model IEnumerable<NewsMvc.Models.News> @{ Layout = null; } <!DOCTYPE html> <html> <head> <title>首页</title> <style type="text/css"> body { font-size: 12pt; } a { text-decoration:none; } </style> </head> <body> <p> @Html.ActionLink("添加", "Create") </p> <table> <tr> <th> 标题 </th> <th> 添加人 </th> <th> 内容 </th> <th> 添加时间 </th> <th> </th> </tr> @foreach (var item in Model) { <tr> <td> @Html.DisplayFor(modelItem => item.Title) </td> <td> @Html.DisplayFor(modelItem => item.AddUser) </td> <td> @Html.DisplayFor(modelItem => item.Content) </td> <td> @Html.DisplayFor(modelItem => item.AddDate) </td> <td> @Html.ActionLink("编辑", "Edit", new { id = item.Id }) | @Html.ActionLink("查看", "Details", new { id = item.Id }) | @Html.ActionLink("删除", "Delete", new { id = item.Id }) <a href="News/Edit/@item.Id">编辑</a> <a href="News/Delete/@item.Id" onclick="return confirm('删除后无法恢复，是否删除？')">X</a> </td> </tr> } </table> </body> </html>
2.Create.cshtml(添加页面)。这里引用了一个日历控件，链接：http://www.my97.net/dp/down.asp
<!DOCTYPE html>
<html>
<head>
<title>添加新闻</title>
<script src="../../Scripts/datePicker/WdatePicker.js" type="text/javascript"></script>
</head>
<body>
<form method="post">
<fieldset>
<legend>新闻信息</legend>
<div class="editor-label">
标题
</div>
<div class="editor-field">
<input type="text" id="news_title" name="news_title" />
</div>
<div class="editor-label">
添加人
</div>
<div class="editor-field">
<input type="text" id="news_adduers" name="news_adduers" />
</div>
<div class="editor-label">
内容
</div>
<div class="editor-field">
<input type="text" id="news_content" name="news_content" />
</div>
<div class="editor-label">
添加时间
</div>
<div class="editor-field">
<input type="text" id="news_adddate" name="news_adddate" onfocus="WdatePicker({dateFmt:'yyyy-MM-dd',readOnly:true})" />
</div>
<p>
<input type="submit" value="添 加" />
</p>
<div>
@Html.ActionLink("返回列表", "Index")
<a href="Index">返回列表</a>
</div>
</fieldset>
</form>
</body>
</html>
3. Edit.cshtml(修改页面)
@model NewsMvc.Models.News @{ Layout = null; } <!DOCTYPE html> <html> <head> <title>Edit</title> </head> <body> <script src="@Url.Content("~/Scripts/jquery-1.5.1.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.min.js")" type="text/javascript"></script> <script src="@Url.Content("~/Scripts/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script> <script src="../../Scripts/datePicker/WdatePicker.js" type="text/javascript"></script> @using (Html.BeginForm()) { @Html.ValidationSummary(true) <fieldset> <legend>News</legend> @Html.HiddenFor(model => model.Id) <div class="editor-label"> @Html.LabelFor(model => model.Title) </div> <div class="editor-field"> @Html.EditorFor(model => model.Title) @Html.ValidationMessageFor(model => model.Title) </div> <div class="editor-label"> @Html.LabelFor(model => model.AddUser) </div> <div class="editor-field"> @Html.EditorFor(model => model.AddUser) @Html.ValidationMessageFor(model => model.AddUser) </div> <div class="editor-label"> @Html.LabelFor(model => model.Content) </div> <div class="editor-field"> @Html.EditorFor(model => model.Content) @Html.ValidationMessageFor(model => model.Content) </div> <div class="editor-label"> @Html.LabelFor(model => model.AddDate) </div> <div class="editor-field"> @Html.TextBoxFor(model => model.AddDate, new { onfocus = "WdatePicker({dateFmt:'yyyy-MM-dd',readOnly:true})" }) @Html.ValidationMessageFor(model => model.AddDate) </div> <p> <input type="submit" value="Save" /> </p> </fieldset> } <div> @Html.ActionLink("Back to List", "Index") </div> </body> </html>
Models的文件：
1.News.cs
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.ComponentModel.DataAnnotations; namespace NewsMvc.Models { public class News { [Display(Name = "编号")] public int Id { get; set; } [Required(ErrorMessage = "标题必填")] [Display(Name = "标题")] public string Title { get; set; } [Display(Name = "添加人")] public string AddUser { get; set; } [Display(Name = "内容")] public string Content { get; set; } [Display(Name = "添加时间")] [DisplayFormat(DataFormatString = "{0:yyyy-MM-dd}")] public DateTime AddDate { get; set; } [Display(Name = "备注")] public string Remark { get; set; } public string tes { get; set; } } }
2.NewsDbContent.cs
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.Entity; namespace NewsMvc.Models { public class NewsDbContent : DbContext { public DbSet<News> Newss { get; set; } public DbSet<NewsType> NewsTypes { get; set; } } }
3.BaseOption.cs（重点来了，这就是封装了EF的增删改查的公共类）
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Data.Entity; namespace NewsMvc.Models { public class BaseOption<T> where T : class { NewsDbContent ns_db = new NewsDbContent(); //添加 public void Add(T entity) { ns_db.Entry<T>(entity).State = EntityState.Added; ns_db.SaveChanges(); } //修改 public void Update(T entity) { ns_db.Set<T>().Attach(entity); ns_db.Entry<T>(entity).State = EntityState.Modified; ns_db.SaveChanges(); } //删除 public void Delete(params object[] keyValues) { T t = FindById(keyValues); ns_db.Set<T>().Attach(t); ns_db.Entry<T>(t).State = EntityState.Deleted; ns_db.SaveChanges(); } //查询集合 public List<T> getlist(T entity) { return ns_db.Set<T>().ToList(); } //根据Id返回查询的集合 public T FindById(params object[] keyValues) { return ns_db.Set<T>().Find(keyValues); } } }
如何使用这个呢，以下是例子：
Controllers文件夹下的文件
NewsController.cs
using System; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.Mvc; using NewsMvc.Models; using System.Text; namespace NewsMvc.Controllers { public class NewsController : Controller { BaseOption<News> bs = new BaseOption<News>(); //列表页面 public ActionResult Index() { News ns = new News(); return View(bs.getlist(ns)); } //添加 public ActionResult Create() { return View(); } //添加 [HttpPost] public ActionResult Create(News ns) { ns.Title = Request.Form["news_title"].ToString().Trim(); ns.AddUser = Request.Form["news_adduers"].ToString().Trim(); ns.Content = Request.Form["news_content"].ToString().Trim(); ns.AddDate = DateTime.Parse(Request.Form["news_adddate"].ToString().Trim()); bs.Add(ns); return RedirectToAction("Index"); } //修改 News ns = new News(); public ActionResult Edit(int id) { ns = bs.FindById(id); return View(ns); } //修改 [HttpPost] public ActionResult Edit(News ns) { bs.Update(ns); return RedirectToAction("Index"); } //删除 public ActionResult Delete(int id) { bs.Delete(id); return RedirectToAction("Index"); } } }
Web.config文件
<?xml version="1.0" encoding="utf-8"?> <!-- 有关如何配置 ASP.NET 应用程序的详细信息，请访问 http://go.microsoft.com/fwlink/?LinkId=152368 --> <configuration> <configSections> <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" /> <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 --> </configSections> <appSettings> <add key="webpages:Version" value="1.0.0.0" /> <add key="ClientValidationEnabled" value="true" /> <add key="UnobtrusiveJavaScriptEnabled" value="true" /> </appSettings> <connectionStrings> <add name="NewsDbContent" connectionString="Data Source=.;Initial Catalog=News;Integrated Security=true;" providerName="System.Data.SqlClient" /> </connectionStrings> <system.web> <compilation debug="true" targetFramework="4.0"> <assemblies> <add assembly="System.Web.Abstractions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Helpers, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Routing, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.Mvc, Version=3.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Web.WebPages, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /> <add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" /> </assemblies> </compilation> <authentication mode="Forms"> <forms loginUrl="~/Account/LogOn" timeout="2880" /> </authentication> <pages> <namespaces> <add namespace="System.Web.Helpers" /> <add namespace="System.Web.Mvc" /> <add namespace="System.Web.Mvc.Ajax" /> <add namespace="System.Web.Mvc.Html" /> <add namespace="System.Web.Routing" /> <add namespace="System.Web.WebPages" /> </namespaces> </pages> </system.web> <system.webServer> <validation validateIntegratedModeConfiguration="false" /> <modules runAllManagedModulesForAllRequests="true" /> </system.webServer> <runtime> <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1"> <dependentAssembly> <assemblyIdentity name="System.Web.Mvc" publicKeyToken="31bf3856ad364e35" /> <bindingRedirect oldVersion="1.0.0.0-2.0.0.0" newVersion="3.0.0.0" /> </dependentAssembly> </assemblyBinding> </runtime> <entityFramework> <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" /> <providers> <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" /> </providers> </entityFramework> </configuration>
Sql数据库代码：（本人使用的sa帐号登录的咯）
数据库名字：News
news表代码：
USE [News] GO /****** 对象: Table [dbo].[News] 脚本日期: 08/26/2015 16:38:17 ******/ SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE TABLE [dbo].[News]( [Id] [int] IDENTITY(1,1) NOT NULL, [Title] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NOT NULL, [AddUser] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NULL, [Content] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NULL, [AddDate] [datetime] NOT NULL, [Remark] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NULL, [tes] [nvarchar](max) COLLATE Chinese_PRC_CI_AS NULL, CONSTRAINT [PK_dbo.News] PRIMARY KEY CLUSTERED ( [Id] ASC )WITH (IGNORE_DUP_KEY = OFF) ON [PRIMARY] ) ON [PRIMARY]
由于不能上传项目，所以需要的留言给我吧。