Linq ORM map Object to 3 level Object - linq

Question

I have object like this. This include Group Question (QG), 1 group question has many Question(Q), 1 question has many answer.
public class CrmQuestionAnswer
{
public long QgId { get; set; }
public string QgName { get; set; }
public int QgMIndex { get; set; }
public int QgMdf { get; set; }
public string QgDescription { get; set; }
public long QId { get; set; }
public long QParentId { get; set; }
public string QName { get; set; }
public string QDescription { get; set; }
public int QMindex { get; set; }
public int QMdf { get; set; }
public bool IsMainQuestion { get; set; }
public bool IsTitle { get; set; }
public int QTypeId { get; set; }
public long AnswerId { get; set; }
public string AnswerName { get; set; }
public string AnswerValue { get; set; }
public int AnswerMdf { get; set; }
public int AnswerMIndex { get; set; }
public string AnswerDescription { get; set; }
public long? LinkQuestionId { get; set; }
}
I want to use Linq to map List CrmQuestionAnswer to List QuestionGroupView
public class QuestionGroupView:Title
{
public List<CrmQuestionView> Questions;
}
public class CrmQuestionView: Title
{
public long? ParentId;
public bool? IsMainQuestion;
public bool? IsTitle;
public long? LinkQuestionId;
public List<CrmAnswerView> Answers;
}
public class CrmAnswerView : Title
{
public long? LinkQuestionId;
}
Title is base class:
public class Title
{
public long Id { get; set; }
public string Name { get; set; }
public int MIndex { get; set; }
public int Mdf { get; set; }
public int Type { get; set; }
public string Description { get; set; }
}
I use this code:
public List<QuestionGroupView> GetListQuestionsAnswers(long themaId)
{
var questionAnswerDao = new CrmQuestionAnswerDao();
var questionAnswerlist = questionAnswerDao.GetByThemasId(themaId);
//map List CrmQuestionAnswer -> List QuestionGroupView: 3 level
var listquestiongroup = questionAnswerlist
.OrderBy(t => t.QgMIndex)
.ThenBy(t => t.QMindex)
.GroupBy(t => t.QgId)
.Select(GetQuestionGroup)
.ToList();
return listquestiongroup;
}
private static QuestionGroupView GetQuestionGroup(IGrouping<long, CrmQuestionAnswer> grouping)
{
var group = grouping.First();
var question = new QuestionGroupView
{
Id = group.QgId,
Name = group.QgName,
Description = group.QgDescription,
Mdf = group.QgMdf,
MIndex = group.QgMIndex,
Questions = grouping
.Select(p => new CrmQuestionView
{
Id = p.QId,
Name = p.QName,
Description = p.QDescription,
Mdf = p.QMdf,
MIndex = p.QMindex,
Type = p.QTypeId,
ParentId = p.QParentId,
IsMainQuestion = p.IsMainQuestion,
IsTitle = p.IsTitle,
Answers = grouping//**This line is wrong**
.GroupBy(g => g.QId)
.Select(GetTitle)
.ToList()
})
.ToList()
};
return question;
}
private static CrmAnswerView GetTitle(IGrouping<long, CrmQuestionAnswer> grouping)
{
var group = grouping.First();
var answer = new CrmAnswerView
{
Id = group.AnswerId,
Name = group.AnswerName,
Description = group.AnswerDescription,
MIndex = group.AnswerMIndex,
Mdf = group.AnswerMdf,
Type = group.QTypeId,
LinkQuestionId = group.LinkQuestionId,
};
return answer;
}
This is data get from server Data
My code gets right Group question (2 group) with right List question, but it gets wrong list answer from data.
Can some help me ?
Best regards