using System;
using System.Net;
using System.IO;
using System.Text;


class Request
{
	static void Main(string[] args)	
	{
		try {
			StringBuilder xmlString = new StringBuilder();
			xmlString.Append("<GenerateRequest>");
			AddXmlElement("TxnType", "Refund", xmlString);
			AddXmlElement("PxPayUserId", "TestAccount", xmlString);
			string key = "acff0b611a5cabc19330f52f9db09e4549c225dda64a71aa8775f53cafce75c0";
			AddXmlElement("PxPayKey", key, xmlString);
			AddXmlElement("CurrencyInput", "NZD", xmlString);
			AddXmlElement("AmountInput", "25.00", xmlString);
			AddXmlElement("MerchantReference", "invoice 0003", xmlString);
			AddXmlElement("TxnData1", "data1", xmlString);
			AddXmlElement("TxnData2", "data2", xmlString);
			AddXmlElement("TxnData3", "data3", xmlString);
			AddXmlElement("UrlFail", "http://www.mycompany.com/pxpayresponse.cfm", xmlString);
			AddXmlElement("UrlSuccess", "http://www.mycompany.com/pxpayresponse.cfm", xmlString);
			AddXmlElement("EnableAddBillCard", "0", xmlString);
			AddXmlElement("BillingId", "thx1138", xmlString);
			AddXmlElement("DpsBillingId", "0000000000604716", xmlString);
			AddXmlElement("DpsTxnRef", "00000004010ee522", xmlString);
			AddXmlElement("RefundPassword", "bgh", xmlString);
			xmlString.Append("</GenerateRequest>\n");

			HttpWebRequest webReq =	(HttpWebRequest)WebRequest.Create("https://www.paymentexpress.com/pxpay/pxaccess.aspx");
			webReq.Method = "POST";

			byte[] reqBytes = null;
			reqBytes = Encoding.UTF8.GetBytes(xmlString.ToString());
			webReq.ContentType = "application/x-www-form-urlencoded";
			webReq.ContentLength = reqBytes.Length;
			Stream requestStream = webReq.GetRequestStream();
			requestStream.Write(reqBytes, 0, reqBytes.Length);
			requestStream.Close();

			HttpWebResponse webResponse = (HttpWebResponse)webReq.GetResponse();
			StreamReader streamReader = new StreamReader(webResponse.GetResponseStream( ), Encoding.ASCII );

			string pxRequest;
			pxRequest = streamReader.ReadToEnd();
			streamReader.Close();

			Console.WriteLine(pxRequest);
			Console.WriteLine("");
		}
		catch (Exception ex) 
		{
			Console.WriteLine("Caught exception: " + ex.Message);
		}
	}

	
	static protected void AddXmlElement(string name, string elementValue, StringBuilder xmlString)
	{
		xmlString.Append("<");
		xmlString.Append(name);
		xmlString.Append(">");
		xmlString.Append(elementValue);
		xmlString.Append("</");
		xmlString.Append(name);
		xmlString.Append(">");
	}

}