ADO.NET Entity Framework DevDays
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The document discusses the ADO.NET Entity Framework, which is an extension to the ADO.NET provider model that offers object-relational mapping and LINQ capabilities. It abstracts a conceptual model from the underlying data store schema. The Entity Framework supports pluggable providers for different databases. It allows mapping between the conceptual and storage models and exposes ADO.NET and ORM APIs.
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ADO.NET Entity Framework DevDays
- 2. ADO.NET ENTITY FRAMEWORK Mike Taulty Developer & Platform Group Microsoft UK [email_address] http://www.miketaulty.com
- 3. Entity Framework – Key Facts Extension to the ADO.NET Provider Model Pluggable to support any database Functionality Abstracts a model from your store schema Offers Object Relational Mapping/LINQ and ADO.NET APIs Status Coming in Visual Studio 2008 Sp1, Summer 2008 Currently in VS 2008 Sp1 Beta 1 3 previous independent betas
- 4. ADO.NET Entity Framework SQL Provider Oracle Provider ... Entity Provider Conceptual Model Store Model Map ADO.NET API ORM API Connection Command DataReader ObjectContext ObjectQuery
- 5. ADO.NET Entity Framework SQL Provider Oracle Provider ... ADO.NET API Entity Provider Conceptual Model Store Model Map ORM API
- 6. LINQ to SQL? LINQ to Entities? LINQ to SQL LINQ to Entities Database Support SQL Server Many Object Relational Mapping Capabilities Simple Complex Requires Attributed .NET Code No Yes Status Released Beta
- 7. DEMO Programming Entity Framework with LINQ
- 8. Key Classes State Management Connection provider Metadata MSL SSDL CSDL CRUD
- 9. LINQ to Entities – Lots of Topics
- 10. ADO.NET Entity Framework SQL Provider Oracle Provider ... ADO.NET API ORM API Entity Provider Conceptual Model Store Model Map
- 11. DEMO Manipulating our Conceptual Model
- 12. ADO.NET Entity Framework SQL Provider Oracle Provider ... ORM API Entity Provider Conceptual Model Store Model Map ADO.NET API
- 13. DEMO Programming with Entity SQL and ADO.NET
- 14. EF Providers in Progress Vendor DB Support Microsoft SQL Server Core Lab Oracle, MySQL, PostgreSQL, SQLite IBM DB2, Informix Dynamic Server MySQL AB MySQL Npgsql PostgreSQL OpenLink Many via OpenLink ODBC or JDBC Phoenix SQLite DataDirect Oracle, Sybase, SQL Server, DB2 Firebird Firebird
- 15. Resources New Data Developer Site http://www.datadeveloper.net ADO.NET Team Blog http://blogs.msdn.com/adonet My website http://www.miketaulty.com ( search Entity )
- 16. ADO.NET ENTITY FRAMEWORK Mike Taulty Developer & Platform Group Microsoft UK [email_address] http://www.miketaulty.com
- 18. ADO.NET Today App Code Customers ADO.NET Providers SQL Server Oracle ... DataReader Customers Oracle Command Execute Provider Specific (PL/SQL) “ SELECT * FROM CUSTOMERS” Customers
- 19. ADO.NET Entity Framework Customers Conceptual Model UKCustomer UKPremiumCustomer Map
- 20. ADO.NET Entity Framework App Code Customers ADO.NET Providers* SQL Server Oracle ... Oracle Entity Provider DataReader UKCustomer Command Execute Conceptual Model UKCustomer UKPremiumCustomer Map Provider Agnostic (ESQL) “ SELECT * FROM UKCUSTOMER” UKCustomer
- 21. ADO.NET Entity Framework .NET Entity Provider (Entity SQL) Command Connection Reader EF Store .NET Data Provider V2.0 Command Connection Reader Adapter EF Conceptual Model Entity Entity relationship Store Model (SSDL) Entity Data Model (CSDL) Mapping (MSL) EF Programming Model Object Relational Mapping LINQ
- 22. Programming with Entity SQL The EntityClient provides the usual Connection, Command, DataReader There is no EntityDataAdapter V1.0 the model is read-only Entity SQL has some additional constructs to expose the underlying conceptual model
- 23. DEMO Programming with Entity SQL
- 24. Mapping Examples ( 1 – Splitting ) Mapping Type=“G” Type=“B” Store Good Customers ID FirstName LastName Bad Customers ID ForeName Surname Customers CustomerId First Last Type Entities
- 25. Mapping Examples ( 2 – TPH ) Store Entities Mapping PremiumCustomer Overdraft AccountManager * Framework also supports TPT Customer CustomerId First Last Customers ID FirstName LastName IsPremium Overdraft AccountManager ?
- 26. Mapping Examples ( 3 – View + SPs ) Store Entities Mapping ClientView1 select c.id, c.name from customers c where c.country = ‘UK’ p_DeleteUkCustomer p_UpdateUkCustomer p_InsertUkCustomer UkCustomer CustomerId Name
- 27. DEMO Querying Different Models with Entity SQL
- 28. Programming with LINQ to Entities New Data Access ORM API implemented in assembly System.Data.Entity.dll Many Namespaces System.Data.Entity System.Data.Objects ... Object Relational Mapping API can be used with or without LINQ
- 29. DEMO Programming with LINQ to Entities