private void loadRoom() { cboRoomName.DataSource = Rmod.loadRoominEditTenacy(); cboRoomName.DisplayMember = "TenPhong"; cboRoomName.ValueMember = "MaPhong"; DataTable dt = Tmod.loadeditTenacy(tenacyID); cboRoomName.SelectedValue = dt.Rows[0][2].ToString(); }