Specified cast is not valid

Question

Hello, I have the following code:
if (dataTable.Columns.Count > 1)
strXML = ChartFileNameandPath(chartType) + @"?dataXML=<graph caption='Report ; Summary' subcaption='" + ReportName(reportType) + "' xAxisName='Line Number' yAxisName='Pounds made' rotatelabels='1' slantlabels='1' showNames='1' showvalues='0' numberPrefix='$' exportenabled='1' exportAtClient='1' exportHandler='fcExporter1' exportFormats='PNG=Save as PNG' >";
//Getting the Subtotal of PoundsMade based on the Line Number column
//C# linq query
if (reportType == ReportEnums.Clientsdata) {
var query = from row in dataTable.AsEnumerable()
group row by row.Field<string>("ClientName") into grp
orderby grp.Key
select new {
Clientname = grp.Key,
TotalAmountSpent = grp.Sum(r => r.Field<int>("TotalAmountSpent")) //error here, specified cast is not valid
foreach (var grp in query) {
strXML = strXML + "<set name='" + grp.Clientname.ToString() + "' value='" + grp.TotalAmountSpent.ToString() + "'/>";
I get a error "Specified cast is not valid"
Part of my store procedure where I'm grabbing it from is:
SELECT ClientName,
Mem_Name,
Mem_Address,
Mem_city,
Mem_state,
Sum(mv.AmountSpent) as TotalAmountSpent,
(Sum(mv.AmountSpent)/ (CAST(s.TotalBusinessSales as decimal)) * 100) as PercentAmountSpent
My question is: Am I getting an error because of TotalAmountSpent is an alias?
Thanks,
N

Answer 1

ALTER PROCEDURE usp_Clienttransaction (@FromDate Varchar (30), @ToDate Varchar (30), @Active int)
AS
SELECT ClientName,
Mem_Name,
Mem_Address,
Mem_city,
Mem_state,
Sum(mv.AmountSpent) as TotalAmountSpent,
(Sum(mv.AmountSpent)/ (CAST(s.TotalBusinessSales as decimal)) * 100) as PercentAmountSpent
FROM UnitedDiningClub.dbo.UDC_Member
JOIN UnitedDiningClub.dbo.UDC_MemberVisits mv
ON UDC_Member.Mem_ID = mv.MemberId
JOIN UnitedDiningClub.dbo.UDClub_Client c
ON c.ClientId = mv.RestaurantId
INNER JOIN
( SELECT RestaurantId, sum(AmountSpent) as TotalBusinessSales
FROM UnitedDiningClub.dbo.UDC_MemberVisits
GROUP BY RestaurantId) s
ON s.RestaurantId = c.ClientId
GROUP by ClientName, Mem_Name, Mem_Address , Mem_city , Mem_state, s.TotalBusinessSales
ORDER BY ClientName
Thats the full procedure.
Its coming from a sub query. Would an alias effect the results in c#?