Archive for December, 2009

Microsoft Surface development goes public

At PDC this year Microsoft announced that Surface development resources were going to be made publicly available. (Up until now it had been an “invitation only” system).

This is great news and means anyone can build or prototype Surface applications. The Surface SDK comes with a very good simulator. A table is still needed to evaluate performance and usability, but you can go a long way with just the simulator.

Microsoft Surface Simulator

Here is a copy & paste from a recent mail-out:

  • Surface Web site (http://www.surface.com)
  • MSDN (http://msdn.microsoft.com)
  • TechNet (http://technet.microsoft.com)
  • Microsoft Download center (http://www.microsoft.com/downloads)
    • A new product category for all Surface downloads, including the Surface SDK Workstation Edition, applications, documentation, and any software fixes.
  • Microsoft Support (http://support.microsoft.com)
  • WCF Data Services vs WCF RIA Services

    I’ve been having trouble finding a straight forward comparison of these two technologies. On the surface they appear to be solving similar, if not the same problems.

    Make no mistake – the message coming from Microsoft is not clear or consistent – which probably explains the confusion. I suspect the relationship between these two products is still being “discovered” by MS.

    Anyway, in this bliki I will try to sum up my findings as to the differences between them as I figure them out.

    WCF (ADO.NET) Data Services

    WCF (.NET) RIA Services

    Expose data model as RESTful web service Prescriptive approach to n-tier app development
    Cross platform interoperation as a goal
    - “Unlock data silos”
    - Out-of-box support from future MS products such as SQL2008 R2, Azure, Excel 2010, SharePoint 2010
    Designed specifically for end-to-end Silverlight & ASP.NET solutions
    - Some technology proprietary to Silverlight (no WPF support)
    - Use ASP.NET Authentication/Roles across SL and ASP.NET
    - ASP.NET/AJAX can also access service layer
    Loosely coupled clients and servers Client & server are designed and deployed together
    Service layer exposes “raw” data sources Opportunity to easily add business logic into service layer
    - Encourage “domain” concepts
    - Strong validation framework
    - Offline / Sync enabled
    Service can be consumed from .NET, Silverlight, AJAX, PHP and Java (libraries available) Service can be consumed easily from SL, AJAX, WebForms
    Service’s data source must:
    - Expose at least one IQueryable property
    - Implement IUpdateable if you desire updates
    Service exposes domain objects via convention:
    - IQueryable GetX
    - UpdateX/InsertX/DeleteX
    No design time experience yet (??) Design time experience with data sources, drag drop etc
    - OData for all clients
    - Within OData, multiple formats supported (JSON, XML etc)
    - SOAP (binary) for SL clients
    - JSON for AJAX clients
    - SOAP (XML) for other clients
    Discoverable (?) Non-discoverable
    Hosted as WCF Service (.svc) Old version hosted in custom web handler (.axd).
    New version is WCF service.
    Standardized on OData protocol Will “support” OData
    More mature – public for at least 2 years, formerly “Project Astoria” Less mature – public for 6 months

    Common features

    • Based on WCF
    • Use a RESTful architecture
    • Can be used to expose any data source (sql, xml, poco/objects etc.)
    • Client side libraries provide ability to query using LINQ

    General

    • Currently they do not share much (any?) technology / code
    • RIA Services is not based on top of Data Services
    • RIA Services & Data Services will “align”
    • OData eventually pushed down into WCF stack

    Your opinions are welcome!

    References

    http://blogs.msdn.com/brada/archive/2009/03/19/what-is-net-ria-services.aspx

    http://mschannel9.vo.msecnd.net/o9/mix/09/pptx/t36f.pptx

    http://blogs.msdn.com/endpoint/archive/2009/11/18/the-wcf-services-ecosystem.aspx

    http://www.douglaspurdy.com/2009/11/20/on-odata-open-data-protocol/

    http://msdn.microsoft.com/en-us/data/ee844254.aspx

    http://blogs.msdn.com/saurabh/archive/2009/11/23/understanding-the-wcf-in-wcf-ria-services.aspx