public int Get_CouponByID(int couponID) { int exists = 0; MessageUserControl.TryRun(() => { RentalController sysmgr = new RentalController(); List <Coupon> results = sysmgr.List_CouponByID(couponID); if (results != null) { exists = 1; } else { exists = 2; } }, "Customer Selected", "Selected customer for new rental"); return(exists); //need to pass it when submitting //same with creditcard }