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This article mainly explains "what are the knowledge points of ADO.NET data platform". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Next, let the editor take you to learn "what are the knowledge points of ADO.NET data platform?"

The ADO.NET data platform is a multi-version strategy that reduces the coding and maintenance effort required by developers by enabling them to program against conceptual entity data models. This platform includes ADO.NET entity framework and related technologies.

The ADO.NET entity framework is designed to enable developers to create data access applications by programming against conceptual application models rather than directly against relational storage schemas. The goal is to reduce the coding and maintenance work required by data-oriented applications.

Entity data Model (EDM) is a design specification that defines application data as multiple sets of entities and relationships. The data in this model supports data relational mapping and data programmability across application boundaries.

EDM data types and relationships are defined in a conceptual model. This conceptual model is a XML schema written in Conceptual Schema definition language (CSDL) that can be used to build programmable classes that represent application data. Developers can extend these objects as needed to meet different application needs.

Object services allow programmers to interact with the conceptual model through a set of common language runtime (CLR) classes. These classes can be generated automatically from the conceptual model or developed separately to reflect the structure of the conceptual model. Object services also provide infrastructure support for entity frameworks, including state management, change tracking, identity parsing, loading and navigation relationships, propagating object changes to database modifications, and entity SQL query generation support.

LINQ to Entities is a language integrated query (LINQ) implementation that allows developers to create strongly typed queries based on the context of entity framework objects by using LINQ expressions and LINQ standard query operators. LINQ to Entities enables developers to work on a conceptual model in which object-relational mapping between Microsoft SQL Server and third-party databases is very flexible. For more information, see LINQ to Entities.

Entity SQL is a text-based query language designed to interact with entity data models. Entity SQL is a variant of SQL that contains query constructs for higher-level modeling concepts, such as inheritance, complex types, and explicit relationships. Developers can also use entity SQL directly with object services. For more information, see Entity SQL Language Reference.

EntityClient is a new .NET Framework data provider for interacting with the entity ADO.NET data platform model. EntityClient follows the .NET Framework data provider pattern, exposing EntityConnection objects and EntityCommand objects that return EntityDataReader. EntityClient is used in conjunction with the entity SQL language to provide flexible mapping to storage-specific data providers.

The ADO.NET data services framework is used to deploy data services on Web or Intranet. The data will be organized into different entities and relationships according to the specifications of the entity data model. The data deployed on this model can be addressed through the standard HTTP protocol.

The entity framework provides command-line tools, wizards, and designers to help build EDM applications. The EntityDataSource control supports an EDM-based data binding scheme. The programming interface of the EntityDataSource control is similar to that of other data source controls in Visual Studio.

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