一步一步学EF系列1【最简单的一个实例】

/// <summary>
    /// 博客用户及随笔类
    /// </summary>
    public class BlogUser
    {
        /// <summary>
        /// 默认情况下属性被命名为ID、id或者[ClassName]Id，将映射为数据表中的主键
        /// 如果没有类似的命名，并且也未显示指明主键，则生成失败，引发异常
        /// </summary>
        public int BlogUserId { get; set; }
        public string BlogName { get; set; }

        /// <summary>
        /// 定义博客用户的随笔列表
        /// virtual表示该列表为延迟加载
        /// </summary>
        public virtual ICollection<Post> Posts { get; set; }
    }

    public partial class Post
    {
        /// <summary>
        /// 随笔的主键id
        /// </summary>
        public int PostId { get; set; }
        //  随笔的标题
        public string PostTitle { get; set; }
        /// <summary>
        /// 操作人
        /// </summary>
        public int BlogUserId { get; set; }
        /// <summary>
        /// 延迟加载博客用户
        /// </summary>
        public virtual BlogUser BlogUser { get; set; }
    }

public class BlogDbContext : DbContext, IDisposable
 {
        public BlogDbContext()
            : base()
        { }
       //实体集合
        public IDbSet<BlogUser> BlogUsers { get; set; }
       public IDbSet<Post> Posts { get; set; }
}

public ActionResult Index()
        {
            var   db= new BlogDbContext();

            //向数据库添加记录
            var blogUser = new BlogUser() { BlogUserId = 1, BlogName = "STONE" };
            db.BlogUsers.Add(blogUser);
            var post = new Post()
            {
                PostId = 1,
                PostTitle = "代码改变世界",
                BlogUserId = 1
            };
            db.Posts.Add(post);
            //保存记录，返回受影响的行数
            int recordsAffected = db.SaveChanges();
            return View(db.Posts.ToList());

        }

<table border="1">
            <tr>
                <td>

                    发布人姓名
                </td>
                <td>
                    随笔标题

                </td>
            </tr>


            @foreach (var item in Model)
            {
                <tr>
                    <td>@item.BlogUser.BlogName</td>
                    <td>@item.PostTitle</td>
                </tr>

            }
</table>