using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 實體拆分.Model
{
    public class Product
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.None)] //設置主鍵需要自己填充
        public int SKU { get; set; }
        public string Description { get; set; }

        public decimal Price { get; set; }

        public string ImageURL { get; set; }
    }
}

2、數(shù)據(jù)實體類結構：

using System;
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using 實體拆分.Model;

namespace 實體拆分.DatabaseContext
{
    public class EFDbContext :DbContext
    {
        public EFDbContext()
            : base("name=Default")
        { }


        public DbSet<Product> Products { get; set; }

        protected override void OnModelCreating(DbModelBuilder modelBuilder)
        {
            modelBuilder.Entity<Product>().Map(p =>
            {
                p.Properties(m => new { m.SKU, m.Price, m.Description });
                p.ToTable("Product");
            })
            .Map(p =>
            {
                p.Properties(m => new { m.SKU, m.ImageURL });
                p.ToTable("ProductWebInfo");
            });


            base.OnModelCreating(modelBuilder);
        }
    }
}

3、使用數(shù)據(jù)遷移生成數(shù)據(jù)庫，生成后的表結構如下圖所示：

4、測試數(shù)據(jù)：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using 實體拆分.DatabaseContext;

namespace 實體拆分
{
    class Program
    {
        static void Main(string[] args)
        {
            using (var context = new EFDbContext())
            {
                context.Products.Add(new Model.Product() {
                    SKU=293,
                    Description="C#高級編程(第10版)",
                    Price=299 ,
                    ImageURL="http://image.baidu.com/1.jpg"
                });
                // 保存
                context.SaveChanges();
            }

            Console.WriteLine("創(chuàng)建成功");
            Console.ReadKey();
        }
    }
}