底层连接已关闭：发送时发生意外错误

Question

我正在尝试在我的网站中使用 DoDirectPayment 方法。

这是我引用的示例：

using com.paypal.sdk.services;
using com.paypal.sdk.profiles;
using com.paypal.sdk.util;
using com.paypal.soap.api;

namespace ASPDotNetSamples
{
    public class DoDirectPayment
    {
        public DoDirectPayment()
        {
        }
        public string DoDirectPaymentCode(string paymentAction, string amount, string creditCardType, string creditCardNumber, string expdate_month, string cvv2Number, string firstName, string lastName, string address1, string city, string state, string zip, string countryCode, string currencyCode)
        {

            com.paypal.soap.api.DoDirectPaymentReq req = new com.paypal.soap.api.DoDirectPaymentReq();


            NVPCallerServices caller = new NVPCallerServices();
            IAPIProfile profile = ProfileFactory.createSignatureAPIProfile();

            // Set up your API credentials, PayPal end point, API operation and version.
            profile.APIUsername = "sdk-three_api1.sdk.com";
            profile.APIPassword = "xxxxxxxxxxxxx";
            profile.APISignature = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
            profile.Environment = "sandbox";
            caller.APIProfile = profile;

            NVPCodec encoder = new NVPCodec();
            encoder["VERSION"] = "51.0";
            encoder["METHOD"] = "DoDirectPayment";

            // Add request-specific fields to the request.
            encoder["PAYMENTACTION"] = paymentAction;
            encoder["AMT"] = amount;
            encoder["CREDITCARDTYPE"] = creditCardType;
            encoder["ACCT"] = creditCardNumber;
            encoder["EXPDATE"] = expdate_month;
            encoder["CVV2"] = cvv2Number;
            encoder["FIRSTNAME"] = firstName;
            encoder["LASTNAME"] = lastName;
            encoder["STREET"] = address1;
            encoder["CITY"] = city;
            encoder["STATE"] = state;
            encoder["ZIP"] = zip;
            encoder["COUNTRYCODE"] = countryCode;
            encoder["CURRENCYCODE"] = currencyCode;

            // Execute the API operation and obtain the response.
            string pStrrequestforNvp = encoder.Encode();
            string pStresponsenvp = caller.Call(pStrrequestforNvp);

            NVPCodec decoder = new NVPCodec();
            decoder.Decode(pStresponsenvp);
            return decoder["ACK"];

        }
    }
}

这是链接：

https： //cms.paypal.com/cms_content/US/en_US/files/developer/nvp_DoDirectPayment_cs.txt

当我传递适当的参数并尝试运行代码我收到此错误：“底层连接已关闭：发送时发生意外错误。”在线：

pp_response = (DoDirectPaymentResponseType)caller.Call("DoDirectPayment", pp_Request);

SOAP 服务调用位于 dll 内部。谁能指导我发生了什么事以及如何解决它？

Answer 1

这是因为该示例似乎已经过时，请在此处阅读更多内容：

• https: //www.x.com/developers/paypal/sandbox
• https://www.x.com/developers/api-endpoints
• https://www.x.com/developers/paypal/documentation-tools/api