private void btn_login_Click(object sender, EventArgs e) { if (tb_password.TextLength * tb_password.TextLength >= 36) { if (BLL_User.login(tb_userName, tb_password)) { BLL_User.showFormRole(BLL_User.getRole(tb_userName.Text), this, new PresentationTier.BanHang.FormMainBanHang(), new PresentationTier.CongNo.FormMainCongNo(), new PresentationTier.Kho.FormMainKho(), new PresentationTier.NhanSu.frmMainNhanSu(), new PresentationTier.PhongKeHoach.FormMainPhongKeHoach(), new PresentationTier.TichHop.FormAdmin()); } else { MessageBox.Show("Thất Bại"); } } else { MessageBox.Show("Sai Định Dạng"); } }