一步一步體驗 ADO.NET Entity Framework：第一步：認識ADO.NET Entity Framework

 

    ADO.NET Entity Framework出來已經有一段時間了，雖然我一直在關注這個架構，但由於比較忙，加之沒有看到發布正式版本而沒有花時間去更深入的瞭解它，vs2008 sp1發布後，ADO.NET Entity Framework已經直接和NET3.5SP1整合了，我想可能ADO.NET Entity Framework除了beta3外，應該不會再單獨發布了，以後的版本應該和net framework的版本同步了。呵呵，個人觀點不值得推敲。

   

    ADO.NET Entity Framework到底有什麼亮點呢？看看MS的MSDN怎麼描述的：

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文太爛了，怕理解錯了意思，就直接把MSDN的E文搬上來啦，中文的還是等MSDN的官方翻譯吧，我覺得這幾大特性很是吸引眼球哦。

 

我們看看VS2008 sp1裡是怎樣支援ADO.NET Entity Framework的呢？

 

添加EDM檔案 對話方塊

  

 

 

 

 

 

 

 

 

先瞭解了一下介面，

後面的慢慢再來.......