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    <p>FOLLOWING MY PREVIOUS ANSWER HERE THE DISADVANTAGES OF RIA SERVICES: On the other end the disadvantage of ria services is its lack of flexibility. Mainly it is like a tube that connect a class on the server side with its client side representative in such a way you operate on the client side class like you were operating directly on the server side class. If the way this "tube" his handled is ok for your application, you get a lot of services fro free (without writing any code...). However, there are limitations that one cannot remove specifically:</p> <p>1) You have not the same freedom in defining behavior, attribute etc. to modify the way the Web service behaves. For instance you cannot define a distributed transaction involving more than one web service. It is difficult to add new endpoints....You have to write code....not simply modifying a configuration file.</p> <p>2) You can only define one Insert/one update/one get methods for each class. If you apply filtering to the client side query via LINQ it is applied only on the client, i.e. all data are downloaded from server and then filtered on the client. On the contrary if you use a WCF data services based on OData and you define a query on the client side. THIS QUERY IS TRANSLATED INTO A REST QUERY (a query encoded in the URL of the request) THEREFORE ONLY THE DATA YOU REQUIRE WITH YOUR FILTER ARE ACTUALLY DOWNLOADED FROM THE SERVER. For more information on WCF data service see <a href="http://msdn.microsoft.com/en-us/data/odata.aspx" rel="nofollow">here</a>.</p> <p>3) By contrast with WCF Data Services you have no Validation service offered as with Ria service. However you can continue using data annotatios with the help of my Validation Toolkit for WPF &amp; Silverlight, that is available for free <a href="http://validationtoolkit.codeplex.com/" rel="nofollow">here</a></p>
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    1. POWhat are the pitfalls of using .NET RIA Services in Silverlight?
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    1. USFrancesco Abbruzzese
    1. USFrancesco Abbruzzese
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    1. COYou're wrong about filtering with RIA services. You just have to make the filtering on the query you get from the RIA context (eg., GetCustomersQuery()) and after that pass it to domainContext.Load(). Then, whole filtering and sorting is done on the server (database server to be precise, since the query gets transferred to the underlying provider, usually EF/L2S, and by it trasnslated to SQL).
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      1. USgius
    2. COYes that is the point! The whole filtering CAN ONLY BE DECIDED ONTHE SERVER. You cannot DECIDE on the CLIENT a filter that will be applied on the server! That is you cannot say to the server ...pls give me just these... The only way to do it is by redefining the method on the server. By contrast with WCF data services ON THE CLIENT you can define a filter to be executed ON THE SEVER. This means MORE AND MORE FLEXIBILITY
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      1. USFrancesco Abbruzzese
    3. COYou can take a query that is defined on the server (includes, filtering and ordering may be there), then work with it furter on the client (add Where, OrderBy clauses), and finally pass it back to the server to load it.
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Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

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