.NET Framework V3.5+ & RESTful web servicesMike TaultyDeveloper & Platform GroupMicrosoft LtdMike.Taulty@microsoft.comhttp://www.mtaulty.com

Agenda

Windows Communication Foundation V3.5ReleasedVisual Studio 2008/.NET Framework V3.5

ADO.NET Data ServicesPreview – framework and toolingLatest is the December CTP, ships H1 2008Has strong links to ADO.NET Entity Framework

– Both are part of ASP.NET 3.5 Extensions Preview

RESTful?

RESTful?

Resources

Res 1

Res 2

Res 3

Res 4

HTTP RequestURL

VERBPayload

HTTP ResponseStatus

GETPOSTPUT

DELETEXML JSON

Payload

XML JSON

RESTful?

REpresentational State TransferIn a nutshell;

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

– GET to read the value of a resource– POST to create a new resource*– PUT to update an existing resource*– DELETE to delete a resource

Returned data is “plain” – XML or JSON

RESTful?

WCF V3.5

WCF V3.5 and REST

New capabilities around RESTful serviceswebHttpBinding

– HTTP(S) protocol (not new in itself)– URI based dispatch and parameter passing– “Plain” XML/JSON serialisation

New RSS/Atom publication capabilities

WCF V3.5 REST and Syndication

ADO.NET Data Services

Data Services

Built on top of WCF V3.5CRUD access to data over a RESTful interface

Returns XML (ATOM format) or JSON

Built-in URI-based query syntaxselection, filtering, paging, sorting

Client-side libraries for .NET and AJAX clientsDesktop .NET and Silverlight .NET

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*)

entity framework? who he?

Extension to the provider modelConceptual model

InheritanceRelationshipsComposite Entities

AbstractionsSchema of the storeSQL dialact of the store

Store

.NET Provider

V2.0

Conceptual Model

.NET Provider(EntitySQL)

ORM & LINQ

“V3.0”

Map

ping

ADO.NET Data Services

More Data Services Capabilities

Service OperationsExpose more advanced functionality

Query InterceptorsHook into requests for resources and run custom logic

Update InterceptorsHook into modifications for resources and run custom logic

ADO.NET Data Services II

Resources

http://www.asp.net(looking for “3.5 Extensions preview”)

http://msdn.co.uk(looking for WCF V3.5 screencasts)

MSDN in the UK

Visit http://msdn.co.uk NewsletterEventsScreencastsBlogs

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