private void btnadd_Click(object sender, EventArgs e)
{
DonHang DH = new DonHang(0, Int32.Parse(txtkhoiluong.Text), Int32.Parse(txtkhoiluong.Text), int.Parse(String.Format("{0:G}", Double.Parse(txtDatCoc.Text))), "Chờ", txtmota.Text, dtThoiGianVanChuyen.Value, lbSHD.Text, Int16.Parse(txtKhoangCach.Text));
DonHang.addDonHang();
this.Close();
}
