private void DuaThongTinVaoCTHD()
{
if (cthd != null)
{
lblTenMon.Text = MonBUS.LayTenMonAn(cthd.MaMon);
lblDonGia.Text = cthd.DonGia.ToString();
txtSoLuong.Text = cthd.SoLuong.ToString();
rtbGhiChu.Text = cthd.GhiChu;
}
else
{
lblTenMon.Text = lblDonGia.Text = txtSoLuong.Text = rtbGhiChu.Text = string.Empty;
}
}