Ответ 1
Используйте это -:
public void MakeNotificationForAndroid(string DeviceToken, string Body, string Sound, string CustomFrom, string CustomeMsg)
{
String DeviceID = "";
DeviceID = DeviceToken;
WebRequest tRequest;
tRequest = WebRequest.Create("https://android.googleapis.com/gcm/send");
tRequest.Method = "post";
tRequest.ContentType = "application/x-www-form-urlencoded";
tRequest.Headers.Add(string.Format("Authorization: key={0}", "AIzaSyBX1gD47uiVp0W_UjNxhwtVsQCNJYfg5vI"));
String collaspeKey = Guid.NewGuid().ToString("n");
//String postData=string.Format("registration_id={0}&data.payload={1}&collapse_key={2}", DeviceID, "Pickup Message", collaspeKey);
String postData = string.Format("registration_id={0}&data.message={1}&collapse_key={2}&data.sound={3}&data.type={4}", DeviceID, Body, collaspeKey, Sound, CustomeMsg);
Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
tRequest.ContentLength = byteArray.Length;
Stream dataStream = tRequest.GetRequestStream();
dataStream.Write(byteArray, 0, byteArray.Length);
dataStream.Close();
WebResponse tResponse = tRequest.GetResponse();
dataStream = tResponse.GetResponseStream();
StreamReader tReader = new StreamReader(dataStream);
String sResponseFromServer = tReader.ReadToEnd();
tReader.Close();
dataStream.Close();
tResponse.Close();
}