Entity Framework 实体拆分
把一个实体对象拆分到多个数据表中。例如：把一个博客Blog实体，拆分到多个表中。
（1）实体类
1 public class Blog
2 {
3 public int Id { get; set; }
4
5 public string Title { get; set; }
6
7 public string Author { get; set; }
8
9 public DateTime CreatedTime { get; set; }
10
11 public string Context { get; set; }
12 }
（2）映射
1 public class BlogMap : EntityTypeConfiguration<Blog>
2 {
3 public BlogMap()
4 {
5 this.HasKey(p => p.Id);
6
7 this.Property(p => p.Id).HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
8 this.Property(p => p.Title).IsRequired().HasMaxLength(63);
9 this.Property(p => p.Author).IsRequired().HasMaxLength(31);
10 this.Property(p => p.CreatedTime).IsRequired();
11 this.Property(p => p.Context).IsOptional();
12
13 this.Map(m =>
14 {
15 m.ToTable("Blog");
16 m.Properties(p => new { p.Id, p.Title, p.Author, p.CreatedTime });
17 }).Map(m => {
18 m.ToTable("BlogDetail");
19 m.Properties(p => new { p.Id, p.Context});
20 });
21 }
22 }
（3）实际效果
