在 C#.net 中向多个设备（但不是所有设备）发送 FCM 通知

Posted 2023-02-24

【中文标题】在 C#.net 中向多个设备（但不是所有设备）发送 FCM 通知

【英文标题】：Sending FCM Notifications to multiple devices (but not all devices) in C#.net

【发布时间】：2017-01-17 13:41:00

【问题描述】：

我在我的 android 应用中使用 FCM 通知。 通知必须使用 .net 页面同时发送给有限数量的用户（大约 200 个用户）

    public static void SendPushNotification()
    

        try
        

            string applicationID = "ABC****xyz";

            string senderId = "01*****89";

            string deviceId1 = "def****jdk";
            string deviceId2 = "lej****wka";
            string deviceId3 = "fqx****pls";

            WebRequest tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send");
            tRequest.Method = "post";
            tRequest.ContentType = "application/json";
            var data = new
            
                //This line is the problem
                to = deviceId1+","+deviceId2+","+deviceId3,
                notification = new
                
                    body = "Notification Body",
                    title = "Notification Title",
                    sound = "Enabled",
                    icon = "MyIcon"

                
            ;
            var serializer = new javascriptSerializer();
            var json = serializer.Serialize(data);
            Byte[] byteArray = Encoding.UTF8.GetBytes(json);
            tRequest.Headers.Add(string.Format("Authorization: key=0", applicationID));
            tRequest.Headers.Add(string.Format("Sender: id=0", senderId));
            tRequest.ContentLength = byteArray.Length;
            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();
                            string str = sResponseFromServer;
                        
                    
                
            
        
        catch (Exception ex)
        
            string str = ex.Message;
        
    

to 行是我连接多个设备的问题 我怎样才能只为这些设备发送通知？

谢谢

【参考方案1】：

要向多个设备发送推送通知，您必须使用“registration_ids”而不是包含设备令牌数组的“to”参数。限制是您可以通过此方法提供最多 1000 个设备令牌。查看此内容以供参考FCM Downstream Messages