SubQuery - The method or operation is not implemented.

I have such a query, which works OK if I don’t use string concatenation in the anonymous object Customer, if I add l.FullName + “C” I get an exception saying “The method or operation is not implemented.”

            var q = from se in _dataContext.ScheduleEvent
                where se.Start.HasValue && se.Start.Value.Date == request.Date.Date
                from seas in _dataContext.ScheduleEventAttendees
                where seas.ScheduleEvent_Id == se.Id
                from sea in _dataContext.ScheduleEventAttendee
                where sea.Id == seas.ScheduleEventAttendee_Id
                from sepNull in (from sep in _dataContext.ScheduleEventProperties
                    where sep.ScheduleEvent_id == se.Id && (sep.Name == Scheduler.PropEventJobId || sep.Name == Scheduler.PropEventLeadId)
                    select sep).DefaultIfEmpty()
                from appTypeNull in (from appType in _dataContext.ScheduleEventAppointmentTypeHistory
                    where appType.ScheduleEvent_Id == se.Id
                          && appType.Id == (from appTypeMax in _dataContext.ScheduleEventAppointmentTypeHistory
                              where appTypeMax.ScheduleEvent_Id == se.Id
                              select appTypeMax.Id).Max()
                    select appType).DefaultIfEmpty()
                from jobTypeNull in (from sep in _dataContext.ScheduleEventProperties
                    where sep.ScheduleEvent_id == se.Id && (sep.Name == Scheduler.PropEventJobId || sep.Name == Scheduler.PropEventLeadId)
                    select new
                    {
                        JobId = sep.IntValue,
                        JobIdType = sep.Name == Scheduler.PropEventJobId ? JobQuoteJobIdType.JobQuote : JobQuoteJobIdType.Lead
                    }).DefaultIfEmpty()
                from fabNull in (from sep in _dataContext.ScheduleEventProperties
                    where sep.ScheduleEvent_id == se.Id && (sep.Name == Scheduler.PropEventJobId || sep.Name == Scheduler.PropEventLeadId)
                    select new
                    {
                        Fabricator = sep.Name == Scheduler.PropEventJobId
                            ? (from j in _dataContext.ClientJob
                                where j.Id == sep.IntValue
                                from quote in _dataContext.Quote
                                where quote.ClientJob_id == j.Id
                                from cb in _dataContext.CustomerBase
                                where cb.Id == (from quoteBid in _dataContext.QuoteBid
                                          where quoteBid.Quote_id == quote.Id
                                          select quoteBid.Fabricator_id).FirstOrDefault()
                                select new
                                {
                                    Id = cb.Id,
                                    Name = cb.Name,
                                    Email = cb.ContactEmail,
                                    Phone = cb.CanonicalPhone,
                                    Address = cb.Address1,
                                    Zip = cb.Postal
                                }).FirstOrDefault()
                            : (from l in _dataContext.Lead
                                where l.Id == sep.IntValue
                                from cb in _dataContext.CustomerBase
                                where cb.Id == l.Fabricator_Id
                                select new
                                {
                                    Id = cb.Id,
                                    Name = cb.Name,
                                    Email = l.Email,
                                    Phone = l.Phone,
                                    Address = l.FullAddress,
                                    Zip = l.Zip
                                }).FirstOrDefault()
                    }).DefaultIfEmpty()
                from custNull in (from sep in _dataContext.ScheduleEventProperties
                    where sep.ScheduleEvent_id == se.Id && (sep.Name == Scheduler.PropEventJobId || sep.Name == Scheduler.PropEventLeadId)
                    select new
                    {
                        Customer = sep.Name == Scheduler.PropEventJobId
                            ? (from j in _dataContext.ClientJob
                                where j.Id == sep.IntValue
                                from cb in _dataContext.CustomerBase
                                where cb.Id == j.Client_id
                                select new
                                {
                                    Id = cb.Id,
                                    Name = cb.Name,
                                    Email = cb.ContactEmail,
                                    Phone = cb.CanonicalPhone,
                                    Address = cb.Address1,
                                    Zip = cb.Postal
                                }).FirstOrDefault()
                            : (from l in _dataContext.Lead
                                where l.Id == sep.IntValue
                                select new
                                {
                                    Id = l.Id,
                                    Name = l.FullName + "C",
                                    Email = l.Email,
                                    Phone = l.Phone,
                                    Address = l.FullAddress,
                                    Zip = l.Zip
                                }).FirstOrDefault()
                    }).DefaultIfEmpty()


                select new
                {
                    Attendee = new
                    {
                        sea.Id,
                        sea.DisplayName,
                        sea.Email
                    },
                    Schedule = new
                    {
                        se.Id,
                        se.Start,
                        se.End,
                        se.Summary,
                        se.Fabricator_Id,
                        LastAppointmentType = appTypeNull == null ? (AppointmentType?) null : appTypeNull.AppointmentType
                    },
                    LastStatus = sepNull != null
                        ? GetLastJobQuoteStatusLogEntry(sepNull.IntValue.Value, sepNull.Name == Scheduler.PropEventJobId ? JobQuoteJobIdType.JobQuote : JobQuoteJobIdType.Lead)
                        : null,
                    JobInfo = jobTypeNull,
                    Fabricator = fabNull,
                    Customer = custNull
                };

Very un-expected error without any explanation.

[sdanyliv]

@integral-llc, attach your generated DataContext file. Maybe i can find time to look here more closer.

[sdanyliv]

@ili, fix is obvious, but i don’t understand this code and why exception was throwed. Here is simplified test that reproduces error:

[Test]
public void Test()
{
   using (var db = new NorthwindDB())
   {
      var q2 = from sep in db.Orders
         select new
         {
            Customer =
            (from l in db.OrderDetails
               select new
               {
                  UnitPrice = l.UnitPrice + 1
               }).FirstOrDefault()
         };

      var str = q2.ToString();
   }
}