x01.Guestbook
留言板(guestbook)比较简单:何人何时留何言。
1.运行 vs2012,选择 MVC 4 模板,输入项目名称:x01.Guestbook,一路默认即可。
2.在项目上右击,从弹出菜单上选择 NuGet 管理器,分别安装 EntityFramwork 和 EntityFramwork.SqlServerCompact,以便使用 DbContext。
3.在 App_Data 文件夹下,创建 Compact 数据库 Guestbook.sdf。表 Entry,字段 Id, Name, Message, Date。
4.在 Models 文件夹下,添加 GuestbookModel.cs 文件,内容如下:
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using System; using System.Collections.Generic; using System.Data.Entity; using System.Linq; namespace x01.Guestbook.Models { public class GuestbookContext : DbContext { public GuestbookContext() : base("Guestbook") { } public DbSet<Entry> Entries { get; set; } } public class Entry { public int Id { get; set; } public string Name { get; set; } public string Message { get; set; } public DateTime Date { get; set; } } public interface IGuestbookReponsitory { IList<Entry> GetEntries(); Entry Find(int id); void Add(Entry entry); } public class GuestbookReponsitory : IGuestbookReponsitory { GuestbookContext _context = new GuestbookContext(); public IList<Entry> GetEntries() { var result = from e in _context.Entries orderby e.Date descending select e; return result.Take(20).ToList(); } public Entry Find(int id) { var r = _context.Entries.Find(id); return r; } public void Add(Entry entry) { entry.Date = DateTime.Now; _context.Entries.Add(entry); _context.SaveChanges(); } } }
5.在 Controllers 文件夹下,添加 GuestbookController.cs 文件,内容如下:
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using System.Web.Mvc; using x01.Guestbook.Models; namespace x01.Guestbook.Controllers { public class GuestbookController : Controller { IGuestbookReponsitory _reponsitory = new GuestbookReponsitory(); public ActionResult Index() { var m = _reponsitory.GetEntries(); return View(m); } public ActionResult Add() { return View(); } [HttpPost] public ActionResult Add(Entry entry) { if (ModelState.IsValid) { _reponsitory.Add(entry); return RedirectToAction("Index"); } return View(entry); } } }
6.在 Views/Guestbook 下,添加 Index.cshtml, Add.cshtml 文件,内容如下:
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@model IEnumerable<x01.Guestbook.Models.Entry> @{ ViewBag.Title = "Index"; } <h2>Index</h2> <p> @Html.ActionLink("Add Message", "Add") </p> <section style="background-color:#fcfcfc; font-size:large;"> @foreach (var item in Model) { <p><b>@item.Name (@item.Date.ToString()): </b><br />@item.Message</p> } </section>
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@model x01.Guestbook.Models.Entry @{ ViewBag.Title = "Add"; } <h2>Add</h2> <form method="post"> Name: <br /> @Html.TextBoxFor(m => m.Name) <br /> Message: <br /> @Html.TextAreaFor(m => m.Message) <br /> <input type="submit" value="Submit" /> </form>
7.修改 Shared/_layout.cshtml 文件中的菜单如下:
<li>@Html.ActionLink("Guestbook","Index","Guestbook")</li>
按 F5 运行无误,则宣告完成。