Firebase Notification Using C#

In this article, we will explore how to send notifications using C# and Firebase Cloud Messaging (FCM)

What Is Firebase Cloud Messaging (FCM)?

Firebase Cloud Messaging (FCM) is a Cloud solution for messaging or notification for Android, iOS, and Web Applications, that lets you reliably send messages at no cost.

It allows the third-party application developers to send notifications or messages from a server to the user of that application.

Implementation:

• create the following method to send FCM notification

  public void SendMessage()
        {
            string serverKey = "Your Server Key ";
            var notificationInputDto = new
            {
                to = "client Device token",
                notification = new
                {
                    body = "Body of your Notification",
                    title = "Title of your Notification ",
                    icon = "",
                    type = ""
                },
                data = new
                {
                    key1 = "value1",
                    key2 = "value2"
                }
            };
            try
            {
                var result = "";
                var webAddr = "https://fcm.googleapis.com/fcm/send";
  
                var httpWebRequest = (HttpWebRequest)WebRequest.Create(webAddr);
                httpWebRequest.ContentType = "application/json";
                httpWebRequest.Headers.Add("Authorization:key=" + serverKey);
                httpWebRequest.Method = "POST";
  
                using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
                {
  
                    streamWriter.Write(JsonConvert.SerializeObject(notificationInputDto));
                    streamWriter.Flush();
                }
  
                var httpResponse = (HttpWebResponse)httpWebRequest.GetResponse();
                using (var streamReader = new StreamReader(httpResponse.GetResponseStream()))
                {
                    result = streamReader.ReadToEnd();
  
                }
  
  
            }
            catch (Exception ex)
            {
                throw;
            }
        }

• In the above code replace Your Server key with your legal server key

Note: You have to copy Legacy Server Key from Firebase Console > Project Settings > Cloud Messaging

var notificationInputDto = new
           {
               to = "client Device token",
               notification = new
               {
                   body = "Body of your Notification",
                   title = "Title of your Notification ",
                   icon = "",
                   type = ""
               },
               data = new
               {
                   key1 = "value1",
                   key2 = "value2"
               }
           };

In the above code of notificationInputDto replace the values of the properties with your values like :

• to:-pass Your client’s Device Token.
• title:- pass the title of the notification.
• body:- pass the body of the notification.
• Data:- Key-Value pair of Additional data to send in the notification.
• icon:-pass Icon you want to send for your notifications(optional).

Hope this article helps you guys.