Question

My select returns joined data from db where for every object there are several attributes. For every attribute of the object I have a new row.
I use Entity Framework to retrieve the data.

var products = _ctx.ExecuteFunction<GetProducts_Result>("GetProducts");

GetProducts is a stored proc that returns following result.

Code    | Name | Term | Rate
--------+------+------+-----
111     | Foo  | 12   | 10
111     | Foo  | 24   | 12  
111     | Foo  | 36   | 16
222     | Boo  | 12   | 8
222     | Boo  | 24   | 9

How I can efficiently query data with linq and map to a class like

class Product
{
     int    Code
     string Name
     List<Term> terms;
}

Where Term is a class with parameters (Term, Rate)

Answer 1

var products = from p in _ctx.ExecuteFunction<GetProducts_Result>("GetProducts")
               group p by new {p.Code, p.Name} into g
               select new Product
               {
                   Code = g.Key.Code,
                   Name = g.Key.Name,
                   terms = g.Select(x => new Terms { 
                                            Term = x.Term, 
                                            Rate = x.Rate }).ToList()
               };