public static string CreateDoExpressCheckoutPaymentQueryString(
DoExpressCheckoutPaymentPayload payload) {
var doExpressCheckoutPaymentMetadata = new NameValueCollection {
{"METHOD", payload.Method},
{"VERSION", payload.Version},
{"USER", payload.User},
{"PWD", payload.Password},
{"SIGNATURE", payload.Signature},
{"SUBJECT", payload.Subject},
{"TOKEN", payload.AccessToken},
{"PAYERID", payload.PayerID}, {
"PAYMENTREQUEST_0_PAYMENTACTION",
payload.PaymentRequestPaymentAction
},
{"PAYMENTREQUEST_0_AMT", payload.PaymentRequestAmt}, {
"PAYMENTREQUEST_0_CURRENCYCODE",
payload.PaymentRequestCurrencyCode
},
{"PAYMENTREQUEST_0_NOTIFYURL", payload.PaymentRequestNotifyUrl},
};
return string.Join("&",
doExpressCheckoutPaymentMetadata.AllKeys.Select(
key => string.Concat(key, "=", HttpUtility.UrlEncode(
doExpressCheckoutPaymentMetadata[key]))));
}
public static string CreateDoExpressCheckoutPaymentQueryString(
DoExpressCheckoutPaymentPayload payload)
{
var doExpressCheckoutPaymentMetadata = new NameValueCollection {
{ "METHOD", payload.Method },
{ "VERSION", payload.Version },
{ "USER", payload.User },
{ "PWD", payload.Password },
{ "SIGNATURE", payload.Signature },
{ "SUBJECT", payload.Subject },
{ "TOKEN", payload.AccessToken },
{ "PAYERID", payload.PayerID }, {
"PAYMENTREQUEST_0_PAYMENTACTION",
payload.PaymentRequestPaymentAction
},
{ "PAYMENTREQUEST_0_AMT", payload.PaymentRequestAmt }, {
"PAYMENTREQUEST_0_CURRENCYCODE",
payload.PaymentRequestCurrencyCode
},
{ "PAYMENTREQUEST_0_NOTIFYURL", payload.PaymentRequestNotifyUrl },
};
return(string.Join("&",
doExpressCheckoutPaymentMetadata.AllKeys.Select(
key => string.Concat(key, "=", HttpUtility.UrlEncode(
doExpressCheckoutPaymentMetadata[key])))));
}
/// <summary>
/// <see cref="DoExpressCheckoutPayment" /> asynchronous equivalent.
/// <seealso cref="DoExpressCheckoutPayment" />
/// </summary>
/// <param name="payload">
/// Metadata necessary to facilitate a successful
/// <b>DoExpressCheckoutPayment</b> call. Payload will be converted to
/// key-value format..
/// </param>
/// <param name="expressCheckoutUri">Default PayPal ExpressCheckout HTTP URI.</param>
/// <returns>
/// A <see cref="Task" /> of <see cref="string" />, representing a
/// serialised <see cref="TransactionResults" /> instance.
/// </returns>
public async Task <string> DoExpressCheckoutPaymentAsync(
DoExpressCheckoutPaymentPayload payload,
string expressCheckoutUri)
{
var queryString =
ExpressCheckoutMetadataFactory
.CreateDoExpressCheckoutPaymentQueryString(payload);
using (var webClient = new WebClient()) {
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
return(await webClient.DownloadStringTaskAsync(
new Uri(string.Concat(expressCheckoutUri, "?", queryString))));
}
}
/// <summary>
/// <see cref="DoExpressCheckoutPayment" /> asynchronous equivalent.
/// <seealso cref="DoExpressCheckoutPayment" />
/// </summary>
/// <param name="payload">
/// Metadata necessary to facilitate a successful
/// <b>DoExpressCheckoutPayment</b> call. Payload will be converted to
/// key-value format..
/// </param>
/// <param name="expressCheckoutUri">Default PayPal ExpressCheckout HTTP URI.</param>
/// <returns>
/// A <see cref="Task" /> of <see cref="string" />, representing a
/// serialised <see cref="TransactionResults" /> instance.
/// </returns>
public async Task<string> DoExpressCheckoutPaymentAsync(
DoExpressCheckoutPaymentPayload payload,
string expressCheckoutUri) {
var queryString =
ExpressCheckoutMetadataFactory
.CreateDoExpressCheckoutPaymentQueryString(payload);
using (var webClient = new WebClient()) {
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
return await webClient.DownloadStringTaskAsync(
new Uri(string.Concat(expressCheckoutUri, "?", queryString)));
}
}
/// <summary>
/// <see cref="DoExpressCheckoutPayment" /> asynchronous equivalent.
/// <seealso cref="DoExpressCheckoutPayment" />
/// </summary>
/// <param name="payload">
/// Metadata necessary to facilitate a successful
/// <b>DoExpressCheckoutPayment</b> call. Payload will be converted to
/// key-value format..
/// </param>
/// <param name="expressCheckoutUri">Default PayPal ExpressCheckout HTTP URI.</param>
/// <returns>
/// A <see cref="Task" /> of <see cref="string" />, representing a
/// serialised <see cref="TransactionResults" /> instance.
/// </returns>
public async Task<string> DoExpressCheckoutPaymentAsync(
DoExpressCheckoutPaymentPayload payload,
string expressCheckoutUri) {
var queryString =
ExpressCheckoutMetadataFactory
.CreateDoExpressCheckoutPaymentQueryString(payload);
using (var webClient = new WebClient()) {
return await webClient.DownloadStringTaskAsync(
new Uri(string.Concat(expressCheckoutUri, "?", queryString)));
}
}