Mapping Linq Query results to a DTO class

Question

I want to get records from the database using EF and assign the values to a DTO class.Consider the following tables for a Linq query.

TableA,TableB, TableC

F

Answer 1

I would change your DTO from List to IEnumerable and than do everything in a LINQ query.

var query = 
    from ent in TableA
    select new TableA_DTO
    {
        TableAProperty = a.Property,
        TableB_records = 
            from b in TableB
            where ent.Key == b.Key
            select new TableB_DTO
            {
                TableBProperty = b.Property,
                TableC_records =
                    from c in TableC
                    where b.Key == c.Key
                    select new TableC_DTO
                    {
                        TableCProperty = c.Property
                    }
            }
    };