Guestbook
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：
GuestbookModel
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();
}
}
}
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：
GuestbookController
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);
}
}
}
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 Indes.cshtml, Add.cshtml 文件，内容如下：
Index
@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>
@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>
Add
@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>
@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。
分类: C#
作者： Leo_wl
出处： http://www.cnblogs.com/Leo_wl/
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