一步一步体验 ADO.NET Entity Framework：第一步：认识ADO.NET Entity Framework

ADO.NET Entity Framework出来已经有一段时间了，虽然我一直在关注这个架构，但由于比较忙，加之没有看到发布正式版本而没有花时间去更深入的了解它，vs2008 sp1发布后，ADO.NET Entity Framework已经直接和NET3.5SP1集成了，我想可能ADO.NET Entity Framework除了beta3外，应该不会再单独发布了，以后的版本应该和net framework的版本同步了。呵呵，个人观点不值得推敲。

ADO.NET Entity Framework到底有什么亮点呢？看看MS的MSDN怎么描述的：

The ADO.NET Entity Framework is designed to enable developers to create data access applications by programming against a conceptual application model instead of programming directly against a relational storage schema. The goal is to decrease the amount of code and maintenance required for data-oriented applications. Entity Framework applications provide the following benefits:

· Applications can work in terms of a more application-centric conceptual model, including types with inheritance, complex members, and relationships.

· Applications are freed from hard-coded dependencies on a particular data engine or storage schema.

· Mappings between the conceptual model and the storage-specific schema can change without changing the application code.

· Developers can work with a consistent application object model that can be mapped to various storage schemas, possibly implemented in different database management systems.

· Multiple conceptual models can be mapped to a single storage schema.

· Language-integrated query support provides compile-time syntax validation for queries against a conceptual model.

我得E文太烂了，怕理解错了意思，就直接把MSDN的E文搬上来啦，中文的还是等MSDN的官方翻译吧，我觉得这几大特性很是吸引眼球哦。

我们看看VS2008 sp1里是怎样支持ADO.NET Entity Framework的呢？

添加EDM文件对话框