Hi Edward Pauley,
We have several extension methods in the Telerik.Windows.Data assembly in the static class Telerik.Windows.Data.QueryableExtensions. There are several Where methods that you can use to apply the FilterDescriptors over an IQueryable, in case you are using plain old WCF Data Services. So you can take your DataServiceQuery and feed it to this method. The method should "append" the filtering information from the FilterDescriptors and return you the new DataServiceQuery.
In case you are using WCF RIA services, where the EntityQuery<T> is not an IQueryable, we have a similar Where method in the Telerik.Windows.Controls.DomainServices assembly in the Telerik.Windows.Controls.DomainServices.EntityQueryExtensions class. This Where method accepts and EntityQuery<T> and a collection of FilterDescriptors and with the help of some expression visitor magic will return a new "filtered" EntityQuery.
I hope this helps.
the Telerik team
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