Push Notifications in Windows 8: Listing 2

The PushNotifier class

• By Eric Vogel
• 03/25/2012

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Net;
using System.Web;
 
namespace VSMWnsPushNotifier
{
    public class PushNotifier
    {
        public enum PushType
        {
            Badge,
            Tile,
            Toast
        };
 
        private string _uri;
        private string _accessToken;
   
        public PushNotifier(string uri, string accessToken)
        {
            _uri = uri;
            _accessToken = accessToken;
        }
 
        public bool SendNotification(PushType pushType, string text,string imageSource)
        {
            bool result = false;
 
            try
            {
                string rawType = "wns/";
                string notificationContent = String.Empty;
 
                switch (pushType)
                {
                    case PushType.Badge:
                        rawType += "badge";
                        notificationContent = String.Format("<?xml version='1.0' encoding='utf-8'?><badge value=\"{0}\"/>", text);
                        break;
                    case PushType.Tile:
                        rawType += "tile";
                        notificationContent = String.Format("<?xml version='1.0' encoding='utf-8'?><tile><visual lang=\"en-US\">
                        <binding template=\"TileWideSmallImageAndText03\"><image id=\"1\" src=\"{0}\"/><text id=\"1\">{1}</text>
                        </binding></visual></tile>", imageSource, text);
                        break;
                    case PushType.Toast:
                        rawType += "toast";
                        notificationContent = String.Format("<?xml version='1.0' encoding='utf-8'?><toast><visual>
                        <binding template=\"ToastImageAndText01\"><image id=\"1\" src=\"{0}\" alt=\"Placeholder image\"/>
                        <text id=\"1\">{1}</text></binding></visual></toast>", imageSource, text);
                        break;
                    default:
                        break;
                }
 
                var subscriptionUri = new Uri(_uri);
                var request = (HttpWebRequest)WebRequest.Create(subscriptionUri);
                request.Method = "POST";
                request.ContentType = "text/xml";
                request.Headers = new WebHeaderCollection();
                request.Headers.Add("X-WNS-Type", rawType);
                request.Headers.Add("Authorization", "Bearer " + _accessToken);
                byte[] notificationMessage = Encoding.Default.GetBytes(notificationContent);
                request.ContentLength = notificationMessage.Length;
 
                using (Stream requestStream = request.GetRequestStream())
                {
                    requestStream.Write(notificationMessage, 0, notificationMessage.Length);
                }
 
                var response = (HttpWebResponse)request.GetResponse();
 
                result = (response.StatusCode == HttpStatusCode.OK);
            }
            catch (Exception)
            {
                result = false;
            }
 
            return result;
        }
    }
}