public async Task <IActionResult> AddGrade([Bind("GradeId,AccountId,JoinAt")] GradeStudent gradeStudent)
{
if (ModelState.IsValid)
{
_context.Add(gradeStudent);
await _context.SaveChangesAsync();
return(RedirectToAction(nameof(Index)));
}
ViewData["AccountId"] = new SelectList(_context.Account, "Id", "Email", gradeStudent.AccountId);
ViewData["GradeId"] = new SelectList(_context.Grade, "Id", "Id", gradeStudent.GradeId);
return(View(gradeStudent));
}
