public void nextForm() { switch (role) { case 1: AdminForm adminform = new AdminForm(); adminform.ShowDialog(); break; case 2: frmGiaoVien frmGV = new frmGiaoVien(); frmGV.LoadID(id); frmGV.StartPosition = FormStartPosition.CenterScreen; frmGV.ShowDialog(); break; case 3: frmSinhVien frmSV = new frmSinhVien(); frmSV.LoadID(id); frmSV.StartPosition = FormStartPosition.CenterScreen; frmSV.ShowDialog(); break; } }