public JsonResult ThemN(int[] a, int id_student)
{
//mang a
var id = db.STUDENTs.SingleOrDefault(x => x.IDStudent == id_student);
if (id != null)
{
for (int i = 1; i <= a.Length; i++)
{
if (dao.Check(id_student, a[i]))
{
dao.Class_student(id_student, a[i]);
}
}
}
return(Json(new
{
status = true
}));
}