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.NET Framework V3.5+ & RESTfulweb services
Mike Taulty
Developer & Platform Group
Microsoft Ltd
http://www.mtaulty.com
Agenda
Windows Communication Foundation V3.5
Released
Visual Studio 2008/.NET Framework V3.5
ADO.NET Data Services
Preview – framework and tooling
Latest is the December CTP, ships H1 2008
Has 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
VERB
Payload
HTTP Response
Status
GET
POST
PUT
DELETEXML JSON
Payload
XML JSON
RESTful?
REpresentational State Transfer
In a nutshell;Server-side resources identified by a URI
Access 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 services
webHttpBinding
– 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 V3.5
CRUD access to data over a RESTful interface
Returns XML (ATOM format) or JSON
Built-in URI-based query syntax
selection, filtering, paging, sorting
Client-side libraries for .NET and AJAX clients
Desktop .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;IUpdatable
Works well with generated code from;ADO.NET Entity Framework (ObjectContext)
LINQ to SQL (DataContext*)
entity framework? who he?
Extension to the provider model
Conceptual modelInheritance
Relationships
Composite Entities
AbstractionsSchema of the store
SQL dialact of the store
Store
.NET Provider
V2.0
Conceptual Model
.NET Provider(EntitySQL)
ORM & LINQ
“V3.0”
Map
pin
g
ADO.NET Data Services
More Data Services Capabilities
Service Operations
Expose more advanced functionality
Query Interceptors
Hook into requests for resources and run custom logic
Update Interceptors
Hook 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)
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