private void EditObject(SuDungHoaDonInfor hoadon)
        {
            frmCS_KhaiBaoHoaDonByUser frm = new frmCS_KhaiBaoHoaDonByUser(hoadon);

            frm.ShowDialog();
            LoadAllHoaDon();
        }
        private void btnThemCT_Click(object sender, EventArgs e)
        {
            frmCS_KhaiBaoHoaDonByUser frm = new frmCS_KhaiBaoHoaDonByUser();

            frm.ShowDialog();
            LoadAllHoaDon();
        }