EF select: Return Tuple

.net c# entity-framework linq-to-entities

Question

How can I retrieve Tuples at Select using EF4?

        var productCount = (from product in context.products
                    select new Tuple<Product, int>(product, products.Orders.Count));

Or

        var productCount = (from product in context.products
                    select Tuple.Create(product, products.Orders.Count));

Entity framework says that cant use not empty constructor for first case, and not recognize Tuple.Create method for second.

1
17
1/29/2016 5:48:14 AM

Accepted Answer

How about switching to LINQ-to-Objects for the projection:

var productCount = from product in context.products
                select new {Product = product, Count = products.Orders.Count };
var final = from item in productCount.AsEnumerable()
            select Tuple.Create(item.Product, item.Count);
20
1/22/2010 4:29:33 PM

Popular Answer

Try

 var productCount = from product in context.products 
                    select new { product, Count = products.Orders.Count }; 

This will return an anonymous type which is very close to a tuple http://msdn.microsoft.com/en-us/library/bb738512.aspx



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