MVC中的常见问题

1.  The model backing the 'MusicStoreDBContext' context has changed since the database was created.

Consider using Code First Migrations to update the database

Movie这个表是用来记录Model的版本号的，你每次重新生成一次数据库它就会重新给ModelHash列赋一个新值。
和原始数据库就会产生差异．

2. 自动将数据库的表名变复数，导致错误

方法一：使用TableAttribute为实体类指定映射的表名

 [Table("User")]
 public class User
 {
     [Key]
     public int Id { get; set; }
     public string Usn { get; set; }
     public string Pwd { get; set; }
     public DateTime Created { get; set; }
 }

方法二：重写OnModelCreating方法不允许将表名变为复数形式

public class UserContext : DbContext
{
    public UserContext()
        : base("Name=SQLServer")
    { }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<System.Data.Entity.ModelConfiguration.Conventions.PluralizingTableNameConvention>();
    }

    public DbSet<User> User { get; set; }
}