public ActionResult Them(TEACHER teacher)
{
if (dao.Insert_Teacher(teacher))
{
return(RedirectToAction("GiaoVien"));
}
else
{
TempData["msg"] = "<script>alert('Thêm Thất Bại! Lỗi!');</script>";
return(RedirectToAction("Them", "GiaoVien"));
}
}