Ado.net Entity Framework (1) Introduction

Directory

1 Concept 1

2 ado.net Entity Framework 2

2.1 Architecture 2

2.2 Description 2

2.3 EntityConnection 4

2.4 EntityCommand 5

2.5 data access through the EntityDataReader method 6

2.6 Data access via ObjectContext return objectquery<t> mode 9

Concept

LINQ to Entities	A LINQ technology that enables developers to create flexible, strongly typed queries against the Entity Data Model (EDM) object context using LINQ expressions and LINQ standard query operators.
Esql	Entity SQL A storage-independent language similar to SQL. The language directly operates the conceptual entity architecture and supports the Entity Data model features, such as inheritance and relationships.
Ef	Entity Framework Ado.net Entity Framework A set of technologies that support the development of data-oriented software applications that allow developers to use a conceptual model that maps to a logical architecture in a data source.
EDM	Entity Data Model (Entity) A data model that defines the application data as the entity and set of relationships that the common language runtime types and storage structures can map to.
Entity	Entity Ado.net Entity a concept in the Framework application domain where data types are defined in the domain
csdl	Conceptual schema Definition Language conceptual schema definitions language An xml-based language that can be used to define entity types, associations, entity containers, entity sets, and correlation sets for conceptual models
ssdl	Storage schema Definition Language store schema definition language An xml-based language that defines the entity types, associations, entity containers, entity sets, and correlation sets for the storage model, often corresponding to the database schema.
Os.	Mapping specification Language Mapping specification language An xml-based language that can be used to map items defined in the conceptual model to items in the storage model