Web Development

    public string PayNow()
    {
        //construct script for paypal submission
        //construct a form with all hidden variables and say form.submit()
        string modify = string.Empty;
        if (CanUserModifySubscription)
            modify = "1";
        else
            modify = "0";
        StringBuilder paypalJavascript = new StringBuilder();
        if (SubmitPaypal)
        {
            

            paypalJavascript.Append("<form id="\"stockhaltPaypal\"" method="\"post\"" action=");<br mode=" hold=" /">            if (EnableSandboxMode)
                paypalJavascript.Append(SandboxUrl);
            else
                paypalJavascript.Append(PaypalUrl);
            paypalJavascript.AppendLine(">");
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "cmd", Command, Environment.NewLine);
            if (EnableSandboxMode)
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "business", SandboxBusinessEmail, Environment.NewLine);
            else
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "business", BusinessEmail, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "item_name", SubscriptionItemName, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "item_number", SubscriptionItemNumber, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "no_shipping", "1", Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "return", SuccessUrl, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "cancel_return", CancelUrl, Environment.NewLine);
            if (TrialSubscriptionPeriod != 0)
            {
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "a1", TrialSubscriptionAmount.ToString("0.00"), Environment.NewLine);
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "p1", TrialSubscriptionPeriod.ToString(), Environment.NewLine);
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "t1", TrialSubscriptionPeriodUnits.ToString(), Environment.NewLine);
            }

            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "a3", RegularSubscriptionAmount.ToString("0.00"), Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "p3", RegularSubscriptionPeriod.ToString(), Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "t3", RegularSubscriptionPeriodUnits.ToString(), Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "src", RecurAutomatically, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "sra", ReattemptPaymentOnFailure, Environment.NewLine);
            if(!string.IsNullOrEmpty(CustomField))
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "custom", CustomField, Environment.NewLine);
        if (!string.IsNullOrEmpty(OptionFieldName1) && !string.IsNullOrEmpty(OptionFieldValue1))
        {
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "on0", OptionFieldName1, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "os0", OptionFieldValue1, Environment.NewLine);
        }

            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "no_note", "1", Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "currency_code", CurrencyCode, Environment.NewLine);
            paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "rm","2", Environment.NewLine);
            if (!string.IsNullOrEmpty(NotifyUrl))
                paypalJavascript.AppendFormat("<input type="\"hidden\"" name="\"{0}\"" value="\"{1}\"">{2}", "notify_url", NotifyUrl, Environment.NewLine);
            paypalJavascript.AppendLine("</input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></input></form>");
            paypalJavascript.AppendLine("<script type="\"text/javascript\"" language="\"javascript\"">document.forms[\"stockhaltPaypal\"].submit();</script>");
            
            return paypalJavascript.ToString();
        }
        else
        {
            paypalJavascript.AppendLine("<span id="\"stockhaltnolink\""></span>");
            return paypalJavascript.ToString();
        }
    }
}