private void ListPhieuThanhToan(int IDKhachHang)
{
var KhachHang = DBDataProvider.DB.khKhachHangs.Where(x => x.IDKhachHang == IDKhachHang).FirstOrDefault();
memoNoiDungTT.Text = "";
memoNoiDungTT.Text = KhachHang.HoTen.ToUpper() + " THANH TOÁN: ";
var ListDonHang = DBDataProvider.ListPhieuGiaoHang(IDKhachHang);
ccbPhieuThanhToan.DataSource = ListDonHang;
ccbPhieuThanhToan.DataBind();
}