void AddStudentsToRoll()
{
var students = from student in Context.Students
where student.ChoirId == Roll.ChoirId
select student;
var students2 = Context.Students.Where(x => x.ChoirId == Roll.ChoirId);
var attendence = from sa in Students
where sa.RollId == Roll.Id
select sa;
var q = from s in students
where !((from a in attendence select a.StudentId).Contains(s.Id))
select s;
var q2 = students.Where(s => !attendence.Select(a => a.StudentId).Contains(s.Id));
foreach (var ns in q)
{
var sa = new StudentAttendence();
sa.StudentId = ns.Id;
sa.Student = ns;
sa.RollId = Roll.Id;
Students.Add(sa);
}
}
public virtual void AddStudentAttendence(StudentAttendence studentAttendence)
{
((List<StudentAttendence>)StudentAttendences).Add(studentAttendence);
}
public void AddStudentAttendence(StudentAttendence studentAttendence)
{
StudentAttendences.Add(studentAttendence);
}