1. .NET Framework V3.5+ & RESTful web services
Mike Taulty
Developer & Platform Group
Microsoft Ltd

2. Agenda Windows Communication Foundation V3.5 ADO.NET Data Services
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

3. RESTful?

4. RESTful? XML JSON XML JSON Resources Res 1 URL VERB Res 2 GET Payload
HTTP Request
HTTP Response
Status
URL
VERB
GET
POST
PUT
DELETE
Payload
XML
JSON
Payload
XML
JSON

5. 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

6. RESTful?

7. WCF V3.5

8. 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

9. WCF V3.5 REST and Syndication

10. ADO.NET Data Services

11. 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

12. 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*)

13. entity framework? who he?
“V3.0”
Extension to the provider model
Conceptual model
Inheritance
Relationships
Composite Entities
Abstractions
Schema of the store
SQL dialact of the store
ORM & LINQ
.NET Provider
(EntitySQL)
Conceptual Model
Mapping
Store
.NET Provider
V2.0

14. ADO.NET Data Services

15. 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

16. ADO.NET Data Services II

17. http://www.asp.net http://msdn.co.uk Resources
(looking for “3.5 Extensions preview”)
(looking for WCF V3.5 screencasts)

18. MSDN in the UK Visit http://msdn.co.uk Newsletter Events Screencasts
Blogs