public int Invoke()
{
var x = from i in _context.MarkOfTeacher
group i by i.TeacherId into TeacheridCount
select TeacheridCount.Count();
int z = 0;
foreach (var item in x)
{
z++;
}
return(z);
}
// GET: MarkOfTeachers
public async Task <IActionResult> Index()
{
var x = from i in _context.MarkOfTeacher
group i by i.TeacherId into TeacheridCount
select TeacheridCount.Count();
int z = 0;
foreach (var item in x)
{
z++;
}
ViewBag.TeacherCount = z;
return(View(await _context.MarkOfTeacher.ToListAsync()));
}