Firebase Cloud Messaging (FCM) is a cross-platform messaging solution that lets you reliably deliver messages at no cost.

Steps to get server key / SenderID
  1. To get the keys, log in to Firebase account.
  2. Select the project from the list.
  3. Click on "Setting" gear icon and click "Project Settings".

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  4. Click on "Cloud Messaging" tab to select "Server key" and "Sender key" from the below screen.

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Add the below code to send push notifications.
  1. //Create the web request with fire base API
  2. WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
  3. tRequest.Method = "post";
  4. //serverKey - Key from Firebase cloud messaging server
  5. tRequest.Headers.Add(string.Format("Authorization: key={0}", serverKey));
  6. //Sender Id - From firebase project setting
  7. tRequest.Headers.Add(string.Format("Sender: id={0}", senderId));
  8. tRequest.ContentType = "application/json";
  9. var payload = new {
  10. to = deviceId,
  11. priority = "high",
  12. content_available = true,
  13. notification = new {
  14. body = txtmsg,
  15. title = txttitle.Replace(":", ""),
  16. sound = "sound.caf",
  17. badge = badgeCounter
  18. },
  19. };
  20. var serializer = new JavaScriptSerializer();
  21. Byte[] byteArray = Encoding.UTF8.GetBytes(payload);
  22. tRequest.ContentLength = byteArray.Length;
  23. using(Stream dataStream = tRequest.GetRequestStream()) {
  24. dataStream.Write(byteArray, 0, byteArray.Length);
  25. using(WebResponse tResponse = tRequest.GetResponse()) {
  26. using(Stream dataStreamResponse = tResponse.GetResponseStream()) {
  27. if (dataStreamResponse != null) using(StreamReader tReader = new StreamReader(dataStreamResponse)) {
  28. String sResponseFromServer = tReader.ReadToEnd();
  29. result.Response = sResponseFromServer;
  30. }
  31. }
  32. }
  33. }