public ActionResult searchPaypalTransaction(PaypalPaymentSearchForm form)
        {
            if (ModelState.IsValid)
            {
                var txn_id = form.transaction_id;
                try
                {
                    var payment = FindPayment(txn_id);
                    if (payment != null)
                    {
                        form.payment = payment;
                        return View("Search", form);
                    }
                    else
                    {
                        form.error = "Your transaction could not be found.";
                    }
                }
                catch (Exception)
                {
                    form.error = "Your transaction could not be found.";
                }

            }
            return View("Search", form);
        }
 public ActionResult GetSearchPaypalTransaction()
 {
     var model = new PaypalPaymentSearchForm();
     return View("Search", model);
 }