Question

Possible Duplicate:
linq-to-sql group by with count and custom object model

I have a linq-to-sql query that groups and counts and the result ends up in a dictionary. I want to map the dictionary to an object model’s property. The object model looks like this:

public class MyCountModel()
{
  int CountSomeByte1 { get; set; }
  int CountSomeByte2 { get; set; }
  int CountSomeByte3 { get; set; }
  int CountSomeByte4 { get; set; }
  int CountSomeByte5 { get; set; }
  int CountSomeByte6 { get; set; }
}

I want to map the dictionary so that the query ends like this:

var TheQuery = MyDC.SomeTable
               .Where(...)
               .GroupBy(...)
               .ToDictionary(x => x.Key, x=> x.Count()
               .Select(m => new MyCountModel()
               {
                  CountSomeByte1 = ..., // the value where Key is 1
                  CountSomeByte2 = ...., // the value where Key is 2
                  ....
                  CountSomeByte6 = .... // the value where Key is 6
                });

How could I write something like this?
Thanks for your suggestions.

Answer 1

You don’t want to select anything. I think you simply want to ‘reduce’ the query to a single value:

var dictionary = MyDC.SomeTable
               .Where(...)
               .GroupBy(...)
               .ToDictionary(x => x.Key, x=> x.Count());

var result = new  MyCountModel
               {
                  CountSomeByte1 = dictionary[1],
                  CountSomeByte2 = dictionary[2],
                  ....
                  CountSomeByte6 = dictionary[6]
                });