WCF DATA SERVICES in Visual Basic .NET

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WCF DATA SERVICES
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The previous query returns a link to the complex type or navigation property, but you can also use the $expand operator to return the details from the related item as well. The following query returns the Firstname and Lastname, along with OrderItems details: http://localhost/9/MovieService.svc/Orders $select=Firstname,Lastname,OrderItems& $expand=OrderItems
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Friendly Feeds
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It is now possible to map EF model properties to individual AtomPub elements. In our film example you could map a director's name to AtomPub s author element. It is also possible to create custom classes and control how these are formatted in the output. For more information on these features please refer to http://blogs.msdn.com/phaniraj/archive/ 2009/03/21/ado-net-data-services-friendly-feeds-mapping-clr-types.aspx.
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Miscellaneous Improvements
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The WDS team has made a number of other improvements: WDS 1.5 supports two-way data binding (DataServiceCollection), which is great for WPF/Silverlight scenarios. For more information, please see 15 and this blog entry: http://blogs.msdn.com/astoriateam/archive/2009/09/17/introduction-to-data-binding-insilverlight-3-with-ctp2.aspx Improved support for streaming large sets of binary data
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What s the Relationship Between WDS and WCF RIA Services
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Scott Guthrie spoke to RedDevNews.com regarding this (before the name changes):
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"Is .NET RIA Services going to be preferred over ADO.NET DataServices for Silverlight Data Access No. The bits that are being released today for RIA Services actually build on top of ADO.NET DataServices. So you can think of ADO.NET DataServices as providing a kind of lower layer RAW/REST API, and then RIA Services as a layer on top. We definitely think that there are scenarios where you would want to have a pure REST service model. And then the .NET RIA Services gives you things like the validation, cross-tiering, and higher-level services on top. We ve worked hard to layer them nicely, so that RIA Services isn t a competitive technology, but actually just builds on top of ADO.NET DataServices."
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http://reddevnews.com/articles/2009/07/13/interview-with-scott-guthrieon-silverlight-3.aspx
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WCF DATA SERVICES
Conclusion
WCF Data Services makes it very easy to expose your data for integration scenarios or to third parties. WDS could also be employed as an integration layer for web and Silverlight projects. The latest release of WCF Data Services contains much-needed paging and projection features and seems to be a very useful technology. Interested developers should also take a look at WCF RIA Services, which builds on top of WDS, adding many additional features.
Further Reading
http://blogs.msdn.com/astoriateam/ http://msdn.microsoft.com/en-us/library/cc907912.aspx
ASP.NET
ASP.NET is a mature platform on which to build web applications, and it is probably fair to say that most of the changes in this release are enhancements and tweaks. However, don t skip this chapter, because Microsoft has fixed a number of long-term omissions and introduced some very welcome changes.
Project Templates
VS2010 contains a number of new types of ASP.net project and some modifications to existing types: New Empty ASP.NET Web Application (just the bare minimum) New Silverlight 1.0 Web Site (erm, time to move on) New ASP.NET AJAX Server Control and Server Control Extender New ASP.NET MVC 2 Web Application Modified ASP.NET Web Site and a modified ASP.NET Web Application (like VS2008 s ASP.NET Web Site project but with new changes in ASP.NET Web Application as discussed below)
The ASP.NET Web projects now contain common authentication and profile functionality, a master page with a simple layout and jQuery scripts (see Figure 10-1).
ASP.NET
Figure 10-1. New Web Application Project template
Web.config
One of the aspects of ASP.NET that irritated me was how bloated Web.config files have become. To some extent, this bloat was due to ASP.NET 3.0 and 3.5 using version 2 of the CLR and, in order to introduce additional functionality, Microsoft had to override default settings, as well as cope with different versions of IIS (that is, settings for IIS 7.0 and settings for earlier versions). .NET 4.0, however, has a new version of the CLR, so this is no longer a problem. A number of settings have been moved to machine.config, which drastically reduces the size of Web.config. Functionality such as ASP.NET charting, dynamic data, Ajax, and routing is now also automatically registered for you, and so no longer has to be added to the Web.config file. Some developers may not like this addition of functionality that they may not use, but for the majority it will save a bit of configuration and can be overridden in machine.config. What follows is the default Web.config file that is generated for an ASP.NET 4.0 empty web project (the standard ASP.NET project has a larger Web.config as contains authentication and membership stuff as well).
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