MVC EF Code First

1 在Models里面创建类，用[Key]特性指定主键；

2 在Model里面增加导航属性；

3 在web.config里面增加连接字符串

4 创建继承于DbContext的类

5 创建Controller类，生成Index视图

6 在Controller类的Index()里面，通过context.Database.CreateIfNotExist()

//BookInfo.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;

namespace CodeFirst.Models
{
    public class BookInfo
    {
        [Key]
        public int BookId { get; set; }
        public string BookTitle { get; set; }
        public int TypeId { get; set; }

        public BookType BookType { get; set; }
    }

}

//BookType.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.ComponentModel.DataAnnotations;

namespace CodeFirst.Models
{
    public class BookType
    {
         [Key]
        public int TypeId { get; set; }
        public string TypeTitle { get; set; }
        public ICollection<BookInfo> BookInfo { get; set; }
    }

}

//BooksContext

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;

namespace CodeFirst.Models
{
    public class BooksContext:DbContext
    {
        public BooksContext():base("name=BooksContext")
        {
            
        }

        DbSet<BookInfo> BookInfo { get; set; }

        DbSet<BookType> BookType { get; set; }
    }

}

//web.config

<connectionStrings>
    <add name="BooksContext" connectionString="server=.;database=books;uid=sa;pwd=Server2012" providerName="System.Data.SqlClient"/>

</connectionStrings>

//BooksController

using CodeFirst.Models;
using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Web;
using System.Web.Mvc;

namespace CodeFirst.Controllers
{
    public class BooksController : Controller
    {

        DbContext context = new BooksContext();
            
        //
        // GET: /Books/

        public ActionResult Index()
        {
            context.Database.CreateIfNotExists();
            context.SaveChanges();
            return View();
        }

    }
}