Question

I am looking for any examples or guides to using Linq over WCF (n-tier application). Please specify if you are showing something for Linq-to-SQL or Linq-to-entities. I would like to see usage examples for both.

I am wondering how things like deffered execution works over WCF (if it works at all)? Cyclic references support and so on…

Any information to make this a quick start guide to using Linq with WCF is helpful.

Answer 1

There isn’t any LINQ provider that I’m aware of for generic WCF-based queries. LINQ to ADO.NET Data Services, however, lets you query an Entity model over WCF/REST.

From Andy Conrad’s blog:

    static void Main(string[] args)     {       var context=new WebDataContext('http://localhost:18752/Northwind.svc');        var query = from p in context.CreateQuery<Product>('Products')                   where p.UnitsInStock > 100                   select p;        foreach (Product p in query)       {         Console.WriteLine(p.ProductName+', UnitsInStock='+p.UnitsInStock);       }    }