riverlau的专栏

ADO.NET Entity Framework : http://msdn.microsoft.com/en-us/data/aa937723Entity Framework Tutorials :  http://www.asp.net/entity-framework/tutorialsBeginner Guide: http://msdn.microsoft.com/en-us

1. Cross two ObjectContext : attach + changeObjectStateProductCategory product; using(AdventureWorksEntities ent=new AdventureWorksEntities()) { product = e

From Entity Framework 4 In ActionEntity Framework Object Context In Depth                Theentity lifecycle                                -Added—The entity is marked as added.

http://blogs.msdn.com/b/adonet/archive/2007/05/30/entitysql.aspxSQL is the time proven query language for data access. However, since EDM introduces an enhanced data model which builds on entities,

Log                StreamWriter sw =new StreamWriter(Path.Combine(Directory.GetCurrentDirectory(),"log.txt"),true);                sw = newStreamWriter(Path.Combine(Directory.GetCurrentDirectory()

**Linq to SQL Database Context                -Log                                -dc.Log=Console.Out;                                -dc.Log.Flush();                -FinishingCRUD

http://blog.youkuaiyun.com/lcl_data/article/details/5290604Select() 和 SelectMany() 的工作都是依据源值生成一个或多个结果值。Select() 为每个源值生成一个结果值。因此，总体结果是一个与源集合具有相同元素数目的集合。与之相反，SelectMany() 将生成单一总体结果，其中包含来自每个源值的串联子集合。作为参数传递

Minizing the trip to DatabaseQuery CachingCustomizing SQLChange Tracking (turning on no tracking)

Add New Store Procedure*.edmx Design View: Update model from database (add store procedure)Model Browser: Add Function ImportPopup Wizard: Get Column InformationPopup Wizard: Get New Complex T

http://msdn.microsoft.com/en-us/library/cc716747(v=vs.100).aspx