private bool findKhachHangByPhone(string phone)
{
// find Khách hàng by phone number
this._khachHang.DIENTHOAI = phone;
BUS_KhachHang bus_kh = new BUS_KhachHang();
DataTable dt = bus_kh.ListKhachHangTheoSDT(this._khachHang);
if (dt.Rows.Count <= 0)
{
return(false);
}
// co khach Hang
DataRow r = dt.Rows[0];
this._idKH = Convert.ToInt32(r["ID_KhachHang"]);
this._khachHang.HOTEN = r["HoTen"].ToString();
this._khachHang.EMAIL = r["Email"].ToString();
this._khachHang.LOAI = Convert.ToInt32(r["Loai"]);
return(true);
}