public static System.Collections.IList ExpensesCrossTabList()
{
return(ExpenseDataSource
.ExpensesDataSource()
.GroupBy(t =>
new
{
Year = t.Date.Year,
Month = t.Date.Month
})
.Select(myGroup =>
new
{
Year = myGroup.Key.Year,
Month = myGroup.Key.Month,
ComputerDepartment = myGroup.Where(x => x.Department == "Computer").Sum(x => x.Expenses),
MathDepartment = myGroup.Where(x => x.Department == "Math").Sum(x => x.Expenses),
PhysicsDepartment = myGroup.Where(x => x.Department == "Physics").Sum(x => x.Expenses),
Total = myGroup.Sum(x => x.Expenses)
})
.ToList());
}
