ADO.NEXTAdvances in Data Access for 2008

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

What’s Coming in ADO.NET?

Slated for Summer, 2008 as part of an update to VS 2008 and Framework V3.5Current bits are packaged in ASP.NET 3.5 Extensions Preview

More about that package in the next session

Entity Framework

Entity Framework – Key FactsExtends the ADO.NET Provider Model

Pluggable to support any databaseFunctionality

Abstracts a model from your store schemaADO.NET API or LINQ-enabled ORM

StatusCurrently at Beta 3

ADO.NET TodayApp Code

Customers

ADO.NET

ProvidersSQL Server

Oracle

...

DataReader

Customers

Oracle

Command

Execute

Provider Specific (PL/SQL)

“SELECT * FROM CUSTOMERS”

Customers

ADO.NET Entity Framework

Customers

Conceptual ModelUKCustom

er

UKPremiumCustomer

Map

ADO.NET Entity FrameworkApp Code

Customers

ADO.NET

Providers*SQL Server

Oracle

...

Oracle

EntityProvider

DataReaderUKCustom

er

Command

Execute

Conceptual ModelUKCustom

er

UKPremiumCustomer

Map

Provider Agnostic (ESQL)

“SELECT * FROM UKCUSTOMER”UKCustom

er

.NET Entity Provider (Entity SQL)

Command

ConnectionReader

EF

ADO.NET Entity Framework

Store

.NET Data Provider

V2.0

Command

ConnectionReader

Adapter

EF

Conceptual Model

Entity Entityrelationship

Store Model(SSDL)

Entity Data Model(CSDL)

Mapping (MSL)

EFProgramming Model

Object Relational Mapping

LINQ

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

{ Entity Framework }

demo

LINQ to Entities – Lots of TopicsChange Tracking

Concurrency

Transactions

(i)POCO StoredProcs

Inheritance

Customising Code-Gen

Metadata N-Tier

Compiled Queries

Performance

EF Providers in ProgressVendor DB Support

Microsoft SQL ServerCore Lab Oracle, MySQL,

PostgreSQL, SQLiteIBM DB2, Informix Dynamic

ServerMySQL AB MySQLNpgsql PostgreSQLOpenLink Many via OpenLink

ODBC or JDBCPhoenix SQLiteDataDirect Oracle, Sybase, SQL

Server, DB2Firebird Firebird

Data Services

Data Services – Key FactsExtends Windows Communication Foundation V3.5Functionality

CRUD access to data over RESTful web servicesBuilt-in URI-based query syntaxClient-side libraries for .NET and AJAX clients

StatusCurrently in CTP ( latest December )

RESTful Web Services?

ResourcesRes 1Res 2Res 3Res 4

HTTP RequestURL

VERBPayload

HTTP ResponseStatus

GETPOSTPUT

DELETEXML JSON

Payload

XML JSON

RESTful?REpresentational State Transfer

Server-side resources identified by a URIAccess is over HTTP, verb tied to action

GET to read the value of a resourcePOST to create a new resourcePUT to update an existing resourceDELETE to delete a resource

Returned data is “plain” – XML or JSONIs this “the death of SOAP”?

data? what kind of data?Provide a type with public properties which are;

IQueryable<T>, IEnumerable<T>Also get write access if your type implements;

IUpdatableWorks well with generated code from;

ADO.NET Entity Framework (ObjectContext)LINQ to SQL (DataContext*)

{ Data Services }

demo

What’s Coming in ADO.NET?

Slated for Summer, 2008 as part of an update to VS 2008 and Framework V3.5Current bits ASP.NET 3.5 Extensions Preview

Resources

http://www.msdnroadshow.co.uk

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