private decimal?GetAverageGradeByPeriod(GradePeriod period)
{
if (StudentSubjects.Any())
{
var studentSubjectWithGradeInTerm = StudentSubjects.Where(s => s.Grades.Any(g => g.Period == period)).ToList();
if (studentSubjectWithGradeInTerm.Any())
{
return(studentSubjectWithGradeInTerm.Average(s =>
s.Grades.Where(g => g.Period == period).Average(g => g.Value)));
}
}
return(null);
}
private decimal?GetAverageGradeByPeriod(GradePeriod period)
{
if (period == GradePeriod.FirstTerm)
{
if (Students.Any(s => s.AverageGradeFirstTerm != null))
{
return(Students.Where(s => s.AverageGradeFirstTerm != null).Average(s => s.AverageGradeFirstTerm));
}
}
else
{
if (Students.Any(s => s.AverageGradeSecondTerm != null))
{
return(Students.Where(s => s.AverageGradeSecondTerm != null).Average(s => s.AverageGradeSecondTerm));
}
}
return(null);
}
