How to send a notification from a C # Console application

Question

I want to create a console application that is used to send notifications to various mobile devices using Goolge fire safety notifications,

I saw the code from the Send Push link on Android using C # using FCM (Firebase Cloud Messaging)

I get an internal server error with status code 500

try{ string url = @"https://fcm.googleapis.com/fcm/send"; WebRequest tRequest = WebRequest.Create(url); tRequest.Method = "post"; tRequest.ContentType = "application/json"; string postData = "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message=" + "This is the message" + "&data.time=" + System.DateTime.Now.ToString() + "&registration_id=" + deviceId + ""; var data = new { to = deviceId, notification = new { body = "This is the message", title = "This is the title" } }; string jsonss = Newtonsoft.Json.JsonConvert.SerializeObject(data); Byte[] byteArray = Encoding.UTF8.GetBytes(jsonss); tRequest.Headers.Add(string.Format("Authorization: key={0}", applicationID)); tRequest.Headers.Add(string.Format("Sender: id={0}", senderId)); tRequest.ContentLength = byteArray.Length; tRequest.ContentType = "application/json"; using (Stream dataStream = tRequest.GetRequestStream()) { dataStream.Write(byteArray, 0, byteArray.Length); using (WebResponse tResponse = tRequest.GetResponse()) { using (Stream dataStreamResponse = tResponse.GetResponseStream()) { using (StreamReader tReader = new StreamReader(dataStreamResponse)) { String sResponseFromServer = tReader.ReadToEnd(); Console.Write(sResponseFromServer); } } } } } catch (Exception ex) { Console.Write(ex.Message); { var sss = ex.Message; if (ex.InnerException != null) { var ss = ex.InnerException; } } } 

Answer 1

Here is the code for sending notifications using C #, I made it work

  WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send"); tRequest.Method = "post"; tRequest.ContentType = "application/json"; var objNotification = new { to = notification.DeviceToken, data = new { title = notification.NotificationTitle, body = notification.NotificationBody } }; string jsonNotificationFormat = Newtonsoft.Json.JsonConvert.SerializeObject(objNotification); Byte[] byteArray = Encoding.UTF8.GetBytes(jsonNotificationFormat); tRequest.Headers.Add(string.Format("Authorization: key={0}", serverKey)); tRequest.Headers.Add(string.Format("Sender: id={0}", senderId)); tRequest.ContentLength = byteArray.Length; tRequest.ContentType = "application/json"; using (Stream dataStream = tRequest.GetRequestStream()) { dataStream.Write(byteArray, 0, byteArray.Length); using (WebResponse tResponse = tRequest.GetResponse()) { using (Stream dataStreamResponse = tResponse.GetResponseStream()) { using (StreamReader tReader = new StreamReader(dataStreamResponse)) { String responseFromFirebaseServer = tReader.ReadToEnd(); FCMResponse response = Newtonsoft.Json.JsonConvert.DeserializeObject<FCMResponse>(responseFromFirebaseServer); if (response.success == 1) { new NotificationBLL().InsertNotificationLog(dayNumber, notification, true); } else if (response.failure == 1) { new NotificationBLL().InsertNotificationLog(dayNumber, notification, false); sbLogger.AppendLine(string.Format("Error sent from FCM server, after sending request : {0} , for following device info: {1}", responseFromFirebaseServer, jsonNotificationFormat)); } } } } } 

Here is the FCMResponse class used in this code to store the response sent from FMServer

  public class FCMResponse { public long multicast_id { get; set; } public int success { get; set; } public int failure { get; set; } public int canonical_ids { get; set; } public List<FCMResult> results { get; set; } } public class FCMResult { public string message_id { get; set; } } 

Answer 2

Yes, Duston is right, I am using the wrong value in the variable applicationID '

Actually I use the value mobilesdk_app_id instead of the current api_key, so it gives 500 errors

Now it works fine :)

Thanks Json, Francis Lord for your efforts :)