Question

For some reason, when using two sums on a group by, i run into the error ‘invalid column name ‘id’. When i only do one sum, it works as expected.

The following fails and throws the error:

from pd in PrDetails.Where(_pd => _pd.PrId == 46)     group pd by new { pd.ProgramFund, pd.ProjectDetail.CostCenter, pd.ProjectDetail.Wbs }     into g select new     {         g.Key.ProgramFund,         g.Key.CostCenter,         g.Key.Wbs,         CommittedTotal = g.Sum(_pd => _pd.PrDetailPrAmounts.Sum(_pa => _pa.CommittedAmount)),         OverheadTotal = g.Sum(_pd => _pd.PrDetailPrAmounts.Sum(_pa => _pa.OverheadAmount))     } 

However, the following does work fine:

from pd in PrDetails.Where(_pd => _pd.PrId == 46)     group pd by new { pd.ProgramFund, pd.ProjectDetail.CostCenter, pd.ProjectDetail.Wbs }     into g select new     {         g.Key.ProgramFund,         g.Key.CostCenter,         g.Key.Wbs,         CommittedTotal = g.Sum(_pd => _pd.PrDetailPrAmounts.Sum(_pa => _pa.CommittedAmount))     } 

And also, when I get the overhead total, instead of the committed total, it works great:

from pd in PrDetails.Where(_pd => _pd.PrId == 46)         group pd by new { pd.ProgramFund, pd.ProjectDetail.CostCenter, pd.ProjectDetail.Wbs }         into g     select new         {             g.Key.ProgramFund,             g.Key.CostCenter,             g.Key.Wbs,             OverheadTotal = g.Sum(_pd => _pd.PrDetailPrAmounts.Sum(_pa => _pa.OverheadAmount))         } 

Why can’t i get the committed total and overhead total at the same time?

I have our basic table structure below:

PrDetails

Id (int)
PrId (int)
ProgramFund (linq class)
ProjectDetail (linq class)

ProjectDetails

Id (int)
CostCenter (linq class)
Wbs (linq class)

PrAmounts

Id (int)
PrDetailId (int)
CommittedAmount (decimal)
OverheadAmount (decimal)

Answer 1

About the only think I can think it might be is a conflict with the names of your parameters. Try this:

from pd in PrDetails.Where(_pd => _pd.PrId == 46) group pd by new { pd.ProgramFund, pd.ProjectDetail.CostCenter, pd.ProjectDetail.Wbs } into g select new {     g.Key.ProgramFund,     g.Key.CostCenter,     g.Key.Wbs,     CommittedTotal = g.Sum(_pd1 => _pd1.PrDetailPrAmounts.Sum(_pa1 => _pa1.CommittedAmount)),     OverheadTotal = g.Sum(_pd2 => _pd2.PrDetailPrAmounts.Sum(_pa2 => _pa2.OverheadAmount)) }