.NET MVC4 实训记录之三（EntityFramework 与枚举）

　　EntityFramework对枚举的引入是从版本5开始的（如果没有记错的话）。枚举可以很大程度上提高对程序的可读性。那么在EntityFramework的CodeFirst模式下，如何使用枚举呢？答案很简单：还是那么用！

　　看似废话，其实不然，看下面（修改上一篇中用户信息定义）：

 1     /// <summary>
 2     /// 性别枚举
 3     /// </summary>
 4     public enum Gender
 5     {
 6         Male,
 7         Female
 8     }
 9 
10     public class UserProfile
11     {
12         [Key]
13         [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
14         [Column(Order = 0)]
15         public int UserId { get; set; }
16 
17         [Column(Order = 1)]
18         [Required]
19         public string UserName { get; set; }
20 
21         [Column(Order = 2)]
22         public string UserCode { get; set; }
23 
24         [Column(Order = 3)]
25         public int Status { get; set; }
26 
27         [Column(Order = 4)]
28         public string Email { get; set; }
29 
30         [Column(Order = 5)]
31         public Gender Gender { get; set; }
32 
33         [Column(Order = 6)]
34         public int? CreatorId { get; set; }
35 
36         public virtual ICollection<Role> Roles { get; set; }
37 
38         public int? AddressId { get; set; }
39 
40         [ForeignKey("AddressId")]
41         public Address Address { get; set; }
42 
43         public UserProfile()
44         {
45             Gender = Framework.DomainModels.Gender.Male;
46         }
47     }

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