本章包括以下几个部分: 1.DataSet and classic ADO.NET approach2.Object model approach3.Object/relational mismatch4.Entity Framework as a solution 当我们设计一个应用程序的时候,必须要决定如何访问并展现数据,这个决定几乎是最重要 的,你要考虑到性能,易于开发和维护等方面的问题,尽管有人尝试引入面向对象的数据库,但是在我们曾经写过的项目中,关系数据库是持久化数据的策略,而且在未来…

1.4 Delving deep into object/relational differences 深入挖掘对象关系的不同 理解面向对象和关系世界的不同是重要的,因为他会影响你设计一个对象模型或者领域模型以及数据库.这个不匹配被拆分成了几个部分:数据类型的不匹配,关联的不匹配,颗粒尺度的不匹配,继承的不配,识别的不匹配,在下面的几个部分,我们会轮流的探究他们,为了更好的阐述这个不匹配,我们还会使用前面提到的例子. 1.4.1 The datatype mismatch 数据类型的不匹配 数据…

After you have introduced a data model, you may need to have the application populate the database with a predefined set of objects. In this topic, you will learn how to add data to the database in code when the application runs. For this purpose, th…

Because I’ve had a lot of conversations about spatial data types lately, I thought I would create a SQL Server table that contained one of every type then bring it into an entity data model using the wizard to see what happens. This is in EF4. Here a…

1.什么是EntityFramework? http://www.entityframeworktutorial.net/what-is-entityframework.aspx Writing and managing ADO.Net code for data access is a tedious乏味 and monotonous单调 job. Microsoft has provided an O/RM[object relational mapping]对象关系映射 framework…

What is Entity Framework? Writing and managing ADO.Net code for data access is a tedious and monotonous job. Microsoft has provided an O/RM framework called "Entity Framework" to automate database related activities for your application. Microso…

原文发布时间为:2011-09-24 -- 来源于本人的百度文章 [由搬家工具导入] http://www.blog.cyberkinetx.com/2011/05/15/entity-framework-context-per-request/ Are you still using the ?1234using(DBContext context = newDBContext()){  ..} way of accessing the database? I mean that’s cool…

This article shows how to access MongoDB data using an Entity Framework code-first approach. Entity Framework 6 is available in .NET 4.5 and above. Entity Framework is an object-relational mapping framework that can be used to work with data as objec…

Reading related data¶ 9 of 9 people found this helpful The Contoso University sample web application demonstrates how to create ASP.NET Core 1.0 MVC web applications using Entity Framework Core 1.0 and Visual Studio 2015. For information about the tu…

Create, Read, Update, and Delete operations¶ 5 of 5 people found this helpful By Tom Dykstra The Contoso University sample web application demonstrates how to create ASP.NET Core 1.0 MVC web applications using Entity Framework Core 1.0 and Visual Stu…