In the previous blog post you saw that there are three different approaches to representing an inheritance hierarchy and I explained Table per Hierarchy (TPH) as the default mapping strategy in EF Code First. We argued that the disadvantages of TPH m…
Inheritance with EF Code First: Part 3 – Table per Concrete Type (TPC) This is the third (and last) post in a series that explains different approaches to map an inheritance hierarchy with EF Code First. I've described these strategies in previous po…
多个实体映射到一张表 Code First允许将多个实体映射到同一张表上,实体必须遵循如下规则: 实体必须是一对一关系 实体必须共享一个公共键 观察下面两个实体: public class Person { [Key] public int PersonId { get; set; } public int SocialSecurityNumber { get; set; } public string FirstName { get; set; } public string LastName…
1.EF Code First一对一关联关系 项目结构图: 实体类: Account.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace Northwind.App.Entities { public class Account { /// <summary> /// 账户ID /// </summary> public int Acco…