Question

I’m getting some data from my database and using linq to calculate sums and counts and group the data.
This is what I have:

        var si = _repository.GetAllByDate(date);

        var cs = from s in si
        group s by s.Name into g
        select new { Comm = g.Key, SIList = g.ToList(), Count = g.Count() };

i now need to pass cs to a method in another class so that I can extract Comm, SIList and Count for each item in the group, what type do I pass it as? IEnumerable doesn’t work. The actual linq group result type seems to be:

{System.Linq.Enumerable.WhereSelectEnumerableIterator<System.Linq.IGrouping<Model.Domain.MasterData
.MyItem,Model.Domain.SI<>f__AnonymousTyped<Model.Domain.MasterData.MyItem,System.Collections.Generic.List<Model.Domain.SI>,int>>}

Any ideas? I effectively want to pass cs as a variable and iterate through it there.

Answer 1

You’ll need to create a type that matches the definition of your anonymous type, if it’s going to be used in different scopes.

public class SomeClass {
    public Comm Comm { get; set; }
    public IList<String> SIList { get; set; }
    public Int32 Count { get; set; }
}

var si = _repository.GetAllByDate(date);

var cs = from s in si
         group s by s.Name into g
         select new SomeClass { Comm = g.Key, SIList = g.ToList(), Count = g.Count() };

EDIT: I supposed we can assume that the list will be of String so I’m editing for that. If that’s the wrong type you’ll need to change the IList<T> definition accordingly.