ado.net entity framework mike taulty developer & platform group microsoft ltd...

ADO.NET Entity Framework

Mike TaultyDeveloper & Platform GroupMicrosoft LtdMike.Taulty@microsoft.com http://www.mtaulty.com

ADO.NET Entity Framework

Extension to the ADO.NET provider modelFunctionality

Program against an abstracted model of your store schemaUse traditional ADO.NET API or ORM/LINQ

Slated to ship mid 2008Currently at Beta 3, Tooling at CTP 2Downloadable in ASP.NET 3.5 Extensions Preview

Quick Demo to Defer Boredom

.NET Entity Provider (Entity SQL)

Command

ConnectionReader

V3.0

Entity Framework Architecture

Store

.NET Data Provider

V2.0

Command

ConnectionReader

Adapter

V3.0

Conceptual Model

Entity Entityrelationship

Mapping (MSL)

V3.0Programming Model

Object Relational Mapping

LINQ

Tools, SSDL, MSL, CSDL

Programming with Entity SQL

The EntityClient provides the usualConnection, 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.;

Programming with Entity Client

Mapping Examples ( 1 – Splitting )

Store

Good CustomersGood Customers

ID

FirstName

LastName

Bad CustomersBad Customers

ID

ForeName

Surname

CustomersCustomers

CustomerId

First

Last

Type

EntitiesMapping

Type=“G”

Type=“B”

Mapping Examples ( 2 – TPH )

Store

CustomerCustomer

CustomerId

First

Last

EntitiesMapping

CustomersCustomers

ID

FirstName

LastName

IsPremium

Overdraft

AccountManagerPremiumCustomerPremiumCustomer

Overdraft

AccountManager

?

* Framework also supports TPT

Mapping Examples ( 3 – View + SPs )

Store

UkCustomerUkCustomer

CustomerId

Name

EntitiesMapping

ClientView1ClientView1

select c.id, c.namefrom customers cwhere c.country = ‘UK’

p_DeleteUkCustomerp_DeleteUkCustomer

p_UpdateUkCustomerp_UpdateUkCustomer

p_InsertUkCustomerp_InsertUkCustomer

Querying with Entity SQL

Programming with LINQ to Entities

New Data Access ORM API implemented in assembly

System.Data.Entity.dllSystem.Data.Entity.Design.dll

Many NamespacesSystem.Data.EntitySystem.Data.Objectsand many more...

ORM API can be used with or without LINQ

Key Classes

StateManagement

Connectionprovider

MetadataMSL SSDLCSDL

CRUD

LINQ to Entities – Possible Topics

LINQ to Entities

Resources

Download ASP.NET 3.5 Extensions Previewhttp://www.asp.net

ADO.NET Team Bloghttp://blogs.msdn.com/adonet

Search for “entity” onhttp://mtaulty.com

Updates

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http://mtaulty.com/downloads/dw08.zip

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