private void bt_Delete_Click(object sender, EventArgs e) { int iSelectedPromoId = Convert.ToInt32(txt_PromoID.Text); if (iSelectedPromoId > 0) { DataAccessPOS dbPOS = new DataAccessPOS(); dbPOS.Delete_Promotion_By_Id(iSelectedPromoId); dbPOS.Delete_PromoProducts_By_PromoId(iSelectedPromoId); bt_Exit.PerformClick(); } }