Question

So I have two tables that have a layout like (but not named):

Table A
-------
AID
Title
ACol1
ACol2 ... (to ACol60)

and

Table B
-------
BID
AID
Title
BCol1
BCol2 ... (to BCol30)

I built a simple class

public class SimpleCollection
{
    public Guid ID { get; set; }
    public string Title { get; set; }
    public IEnumerable<SimpleCollection> Elements { get; set; }
}

What I’m trying to do is two fold:

1. Return in a single call all the parent/child rows.
2. Select only the columns I need so I’m not pulling the 60/30 extra columns I don’t need.

I tried the following:

var query = from A in dbContext.TableA
            from B in A.TableB
            select new SimpleCollection()
            {
                ID = A.AID,
                Title = A.Title,
                Elements = select new SimpleCollection<string>()
                {
                    ID = B.BID,
                    Title = B.Title
                }
            };

But it doesn’t like setting Elements to a select statement.

Answer 1

I believe I was over thinking the problem.

var query = dbContext.TableA
                     .Select(p => new SimpleCollection()
                     {
                       ID = p.AID,
                       Title = p.Title,
                       Elements = p.TableBs
                                   .Select(c => new SimpleCollection()
                                   {
                                     ID = c.BID,
                                     Title = C.Title
                                   }
                     }