// Zaxaa PDT Sample Code for ASP.NET C#

using System;
using System.IO;
using System.Text;
using System.Net;
using System.Web;
using System.Collections.Generic;
using System.Collections.Specialized;

public partial class PdtSample : System.Web.UI.Page
{
	protected void Page_Load(object sender, EventArgs e)
	{
		string pdtUrl       = "http://www.zaxaa.com/notify/pdt";
		string apiSignature = "<YOUR_ZAXAA_API_SIGNATURE>";
        string tx           = Request.QueryString["tx"];
		string query        = "sid=" + apiSignature + "&tx=" + tx;
            
		//Post back to PDT url
		HttpWebRequest req  = (HttpWebRequest)WebRequest.Create(pdtUrl);
     
		//Set values for the request back
		req.Method          = "POST";
		req.ContentType     = "application/x-www-form-urlencoded";
		req.ContentLength   = query.Length;
                
		//Send the request to Zaxaa and get the response
		StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
		streamOut.Write(query);
		streamOut.Close();
		StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
		string strResponse = streamIn.ReadToEnd();
		streamIn.Close();

		if(strResponse != "")
		{
			StringReader reader = new StringReader(strResponse);
			string line=reader.ReadLine();

			NameValueCollection results = HttpUtility.ParseQueryString(line);

            if(results.Count > 0) {
                Response.Write("<ul>");
                foreach(String key in results) {
                    Response.Write("<li>" + key + ": " + results[key] + "</li>");
                }
                Response.Write("</ul>");
            }
		}
		else
		{
			//unknown error
			Response.Write("ERROR");
		}
	}
}