使用.NET中的Azure通知中心将推送通知发送到所有已注册的设备


Send push notification to all registered devices with Azure Notification Hub in .NET

我正在使用Azure Notification Hub，并且我想向.NET后端中的所有已注册设备发送推送通知消息。但是我不确定这种方式是否可以发送到所有设备，因为我没有办法检查收到的推送消息的设备数量。
那么，如何将推送消息发送到所有设备，或者可以确保这种方式正确？

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public static async Task<bool> SendBroadcast(string msg)
    {
        try
        {
            var notificationHubClient = NotificationHubClient.CreateClientFromConnectionString(ConfigurationManager.AppSettings["ServiceBusPushNotificationConnectionString"], ConfigurationManager.AppSettings["ServiceBusPushNotificationName"]);
            Dictionary<string, string> param = new Dictionary<string, string>();
            param.Add("message", msg);
            param.Add("alert", msg);
            var template = new TemplateNotification(param);
            var result = await notificationHubClient.SendNotificationAsync(template);
            Console.WriteLine(JsonConvert.SerializeObject(result));
            return true;
        }
        catch (Exception exception)
        {
            Console.WriteLine(exception.Message);
            return false;
        }
    }
相关讨论

如果您未指定任何标签表达式，则表示它已广播。所有设备都会收到通知。您可以使用"每条消息遥测"来跟踪接收到多少设备。请参见以下链接。

https://msdn.microsoft.com/zh-CN/library/azure/mt608135.aspx
https://azure.microsoft.com/zh-cn/blog/push-notification-hub-telemetry-expiry-update/

您需要使用"路由和标签表达式"中所述的标签：

The only way to target specific registrations is to associate them
with a tag, then target that tag. As discussed in Registration
Management, in order to receive push notifications an app has to
register a device handle on a notification hub. Once a registration is
created on a notification hub, the application backend can send push
notifications to it. The application backend can choose the
registrations to target with a specific notification in the following
ways:

  • Broadcast: all registrations in the notification hub receive the
    notification.

  • Tag: all registrations that contain the specified tag receive the
    notification.

  • Tag expression: all registrations whose set of tags match the
    specified expression receive the notification.

    • 请注意，您需要考虑广播消息的局限性。

    有关如何使用广播通知的详细信息，请查看最新新闻应用示例。