Create Entity Data Model: Here, we are going to create an Entity Data Model (EDM) for SchoolDB database and understand the basic building blocks. Entity Data Model is a model that describes entities and the relationships between them. Let's create fi…
现在我要来为上面一节末尾给出的数据库(SchoolDB)创建实体数据模型: SchoolDB数据库的脚本我已经写好了,如下: USE master GO IF EXISTS(SELECT * FROM sys.sysdatabases WHERE name='SchoolDB') DROP DATABASE SchoolDB; GO CREATE DATABASE SchoolDB GO USE SchoolDB; GO --创建Standard表 IF EXISTS (SELECT * FRO…
http://www.entityframeworktutorial.net/EntityFramework5/create-dbcontext-in-entity-framework5.aspx 官网的教程https://msdn.microsoft.com/en-us/data/jj206878 Here, we are going to create an Entity Data Model (EDM) for SchoolDB database and understand the ba…
We created EDM for existing database in the previous section. As you have learned in the previous section that EDM contains entities for each table in the database. There are two types of Entities in Entity Framework 5.0/6.0: POCO entity and dynamic…
原文链接:http://www.entityframeworktutorial.net/basics/how-entity-framework-works.aspx 这里,你将会大概了解到EF是怎么工作的. Entity Framework API(EF 6和EF Core),可以将领域类映射到数据库中.将LINQ 语句转化为SQL.在实体整个生命周期内,跟踪实体的改变,并且保存改变到数据库中. 实体数据模型(Entity Data Model) EF API 的首要任务就是构建实体数据模型.实…
Here, you will learn how entity framework manages the relationships between entities. Entity framework supports three types of relationships, same as database: 1) One to One 2) One to Many, and 3) Many to Many. We have created an Entity Data Model fo…
DBContext: As you have seen in the previous Create Entity Data Model section, EDM generates the SchoolDBEntities class, which was derived from theSystem.Data.Entity.DbContext class, as shown below. The class that derives DbContext is called context c…
