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
}