ADO.NET Entity Framework Mike Taulty Developer & Platform Group Microsoft Ltd

ADO.NET Entity Framework Extension to the ADO.NET provider model Functionality Program against an abstracted model of your store schema Use traditional ADO.NET API or ORM/LINQ Slated to ship mid 2008 Currently at Beta 3, Tooling at CTP 2 Downloadable in ASP.NET 3.5 Extensions PreviewASP.NET 3.5 Extensions Preview

Quick Demo to Defer Boredom

.NET Entity Provider (Entity SQL) Command Connection Reader V3.0 Entity Framework Architecture Store.NET Data Provider V2.0 Command Connection Reader Adapter V3.0 Conceptual Model Entity relationship Store Model (SSDL) Store Model (SSDL) Entity Data Model (CSDL) Entity Data Model (CSDL) Mapping (MSL) V3.0 Programming Model Object Relational Mapping LINQ

Tools, SSDL, MSL, CSDL

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 – e.g.; ANYELEMEN T CREATEREFDEREFIS OFKEYMULTISETNAVIGATEOFTYPE OVERLAPSREFROWSELECTSETTREATUSING

Programming with Entity Client

Mapping Examples ( 1 – Splitting ) Store Good Customers ID FirstName LastName Bad Customers ID ForeName Surname Customers CustomerId First Last Type EntitiesMapping Type=“G” Type=“B”

Mapping Examples ( 2 – TPH ) Store Customer CustomerId First Last EntitiesMapping Customers ID FirstName LastName IsPremium Overdraft AccountManager PremiumCustomer Overdraft AccountManager ? ? * Framework also supports TPT

Mapping Examples ( 3 – View + SPs ) Store UkCustomer CustomerId Name EntitiesMapping ClientView1 select c.id, c.name from customers c where c.country = ‘UK’ p_DeleteUkCustomer p_UpdateUkCustomer p_InsertUkCustomer

Querying with Entity SQL

Programming with LINQ to Entities New Data Access ORM API implemented in assembly System.Data.Entity.dll System.Data.Entity.Design.dll Many Namespaces System.Data.Entity System.Data.Objects and many more... ORM API can be used with or without LINQ

Key Classes State Management State Management Connection provider Metadata MSL SSDL CSDL CRUD

LINQ to Entities – Possible Topics Change Tracking ConcurrencyTransactions(i)POCO Stored Procs Inheritance Customising Code-Gen Metadata N-Tier Compiled Queries

LINQ to Entities

Resources Download ASP.NET 3.5 Extensions PreviewASP.NET 3.5 Extensions Preview ADO.NET Team Blog Search for “entity” on

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