protected void btnSeries_Click(object sender, EventArgs e)
        {
            SeriesBiz         sBiz = new SeriesBiz();
            lwg_SeriesMapping lwg  = new lwg_SeriesMapping();

            lwg.CatalogID = ProductId;
            lwg.SeriesID  = int.Parse(drpSeries.SelectedValue);
            if (sBiz.SaveSeriesMapping(lwg))
            {
                BindingSeries();
            }
            //TODO: save fail
        }