This repository contains source code for Azure Notification Hubs .NET SDK as well as samples for using the client. This library is also available via NuGet as part of Microsoft.Azure.NotificationHubs.
Table of Contents:
- Building Code
- Getting Started
- Azure Notification Hubs Management Operations
- Azure Notification Hubs Operations
- Azure Notification Hubs Installation API
- Azure Notification Hub Registration API
- Send Notifications
- Scheduled Send Operations
- Import and Export Registrations
- References
To build the Microsoft.Azure.NotificationHubs, you need support for .NET Standard 2.0. This requires a minimum of .NET Core 3.1, .NET Framework 4.6.2 or Mono 5.4. This project ships with two unit test files, one for .NET Core 6.0, and one for .NET Framework 4.6.2 or Mono. This library ships binaries for .NET Standard 2.0, .NET Standard 2.1 and .NET 6.0.
To get started, you can find all the classes in the Microsoft.Azure.NotificationHubs namespace, for example:
using Microsoft.Azure.NotificationHubs;This section details the usage of the Azure Notification Hubs SDK for .NET management operations for CRUD operations on Notification Hubs and Notification Hub Namespaces.
var namespaceManager = new NamespaceManagerClient("connection string");var hub = new NotificationHubDescription("hubname");
hub.WnsCredential = new WnsCredential("sid","key");
hub = await namespaceManager.CreateNotificationHubAsync(hub);var hub = await namespaceManager.GetNotificationHubAsync("hubname", CancellationToken.None);hub.FcmCredential = new FcmCredential("key");
hub = await namespaceManager.UpdateNotificationHubAsync(hub, CancellationToken.None);await namespaceManager.DeleteNotificationHubAsync("hubname", CancellationToken.None);The NotificationHubClient class and INotificationHubClient interface is the main entry point for installations/registrations, but also sending push notifications. To create a NotificationHubClient, you need the connection string from your Access Policy with the desired permissions such as Listen, Manage and Send, and in addition, the hub name to use.
INotificationHubClient hub = new NotificationHubClient("connection string", "hubname");An Installation is an enhanced registration that includes a bag of push related properties. It is the latest and best approach to registering your devices.
The following are some key advantages to using installations:
- Creating or updating an installation is fully idempotent. So you can retry it without any concerns about duplicate registrations.
- The installation model supports a special tag format
($InstallationId:{INSTALLATION_ID})that enables sending a notification directly to the specific device. For example, if the app's code sets an installation ID ofjoe93developerfor this particular device, a developer can target this device when sending a notification to the$InstallationId:{joe93developer}tag. This enables you to target a specific device without having to do any additional coding. - Using installations also enables you to do partial registration updates. The partial update of an installation is requested with a PATCH method using the JSON-Patch standard. This is useful when you want to update tags on the registration. You don't have to pull down the entire registration and then resend all the previous tags again.
Using this SDK, you can do these Installation API operations. For example, we can create an installation for an Amazon Kindle Fire using the Installation class.
var installation = new Installation
{
InstallationId = "installation-id",
PushChannel = "adm-push-channel",
Platform = NotificationPlatform.Adm
};
await hub.CreateOrUpdateInstallationAsync(installation);Alternatively, we can use specific installation classes per type for example AdmInstallation for Amazon Kindle Fire devices.
var installation = new AdmInstallation("installation-id", "adm-push-channel");
await hub.CreateOrUpdateInstallationAsync(installation);An installation can have multiple tags and multiple templates with its own set of tags and headers.
installation.Tags = new List<string> { "foo" };
installation.Templates = new Dictionary<string, InstallationTemplate>
{
{ "template1", new InstallationTemplate { Body = "{\"data\":{\"key1\":\"$(value1)\"}}" } },
{ "template2", new InstallationTemplate { Body = "{\"data\":{\"key2\":\"$(value2)\"}}" } }
};
await hub.CreateOrUpdateInstallationAsync(installation);For advanced scenarios we have partial update capability which allows to modify only particular properties of the installation object. Basically partial update is subset of JSON Patch operations you can run against Installation object.
var addChannel = new PartialUpdateOperation
{
Operation = UpdateOperationType.Add, ,
Path = "/pushChannel",
Value = "adm-push-channel2"
};
var addTag = new PartialUpdateOperation
{
Operation = UpdateOperationType.Add,
Path = "/tags",
Value = "bar"
};
var replaceTemplate = new PartialUpdateOperation
{
Operation = UpdateOperationType.Replace,
Path = "/templates/template1",
Value = new InstallationTemplate { Body = "{\"data\":{\"key3\":\"$(value3)\"}}" }.ToJson()
};
await hub.PatchInstallationAsync(
"installation-id",
new List<PartialUpdateOperation> { addChannel, addTag, replaceTemplate }
);await hub.DeleteinstallationAsync("installation-id");Keep in mind that CreateOrUpdateInstallationAsync, PatchInstallationAsync and DeleteInstallationAsync are eventually consistent with GetInstallationAsync. In fact operation just goes to the system queue during the call and will be executed in background. Moreover Get is not designed for main runtime scenario but just for debug and troubleshooting purposes, it is tightly throttled by the service.
A registration associates the Platform Notification Service (PNS) handle for a device with tags and possibly a template. The PNS handle could be a ChannelURI, device token, or FCM registration ID. Tags are used to route notifications to the correct set of device handles. Templates are used to implement per-registration transformation. The Registration API handles requests for these operations.
var deviceToken = "device-token";
var tags = new HashSet<string> { "platform_ios", "os_tvos" };
AppleRegistrationDescription created = await hub.CreateAppleNativeRegistrationAsync(deviceToken, tags);Analogous for Android (FCM), Windows Phone (MPNS), and Kindle Fire (ADM).
var deviceToken = "device-token";
var jsonBody = "{\"aps\": {\"alert\": \"$(message)\"}}";
AppleTemplateRegistrationDescription created = await hub.CreateAppleTemplateRegistrationAsync(deviceToken, jsonBody);Create registrations using create registrationid+upsert pattern (removes duplicates deriving from lost responses if registration ids are stored on the device):
var deviceToken = "device-token";
var registrationId = await hub.CreateRegistrationIdAsync();
var jsonBody = "{\"aps\": {\"alert\": \"$(message)\"}}";
var reg = new AppleTemplateRegistrationDescription(deviceToken, jsonBody) { RegistrationId = registrationId };
AppleTemplateRegistrationDescription upserted = await hub.CreateOrUpdateRegistrationAsync(reg);await hub.UpdateRegistrationAsync(reg);await hub.DeleteRegistrationAsync(registrationId);AppleRegistrationDescription registration = hub.GetRegistrationAsync(registrationId);This query support $top and continuation tokens.
var registrations = await hub.GetRegistrationsByTagAsync("platform_ios");This query support $top and continuation tokens.
var registrations = await hub.GetRegistrationsByChannelAsync("devicetoken");The Notification object is simply a body with headers, some utility methods help in building the native and template notifications objects.
var jsonBody = "{\"aps\":{\"alert\":\"Notification Hub test notification\"}}";
var n = new AppleNotification(jsonBody);
NotificationOutcome outcome = await hub.SendNotificationAsync(n);Analogous for Android, Windows, Windows Phone, Kindle Fire and Baidu PNS.
var props = new Dictionary<string, string>
{
{ "prop1", "v1" },
{ "prop2", "v2" }
};
var n = new TemplateNotification(props);
NotificationOutcome outcome = hub.SendNotificationAsync(n);Send flow for Installations is the same as for Registrations. We've just introduced an option to target notification to the particular Installation - just use tag "$InstallationId:{desired-id}". For case above it would look like this:
var jsonBody = "{\"aps\":{\"alert\":\"Notification Hub test notification\"}}";
var n = new AppleNotification(jsonBody);
var tags = new List<string> { "$InstallationId:{installation-id}" };
NotificationOutcome outcome = await hub.SendNotificationAsync(n, tags);With the Installation API we now have a new feature that allows you to associate a user ID with an installation and then be able to target it with a send to all devices for that user. To set the user ID for the installation, set the UserId property of the Installation.
var installation = new AppleInstallation("installation-id", "device-token");
installation.UserId = "user1234";
await hub.CreateOrUpdateInstallationAsync(installation);The user can then be targeted to send a notification with the tag format of $UserId:{USER_ID}, for example like the following:
var jsonPayload = "{\"aps\":{\"alert\":\"Notification Hub test notification\"}}";
var n = new AppleNotification(jsonPayload);
NotificationOutcome outcome = await hub.SendNotificationAsync(n, "$UserId:user1234");var props = new Dictionary<string, string>
{
{ "value3", "some value" }
};
var n = new TemplateNotification(prop);
NotificationOutcome outcome = await hub.SendNotificationAsync(n, "$InstallationId:{installation-id} && template1");Note: This feature is only available for STANDARD Tier.
Scheduled send operations are similar to a normal send operations, with a scheduledTime parameter which says when notification should be delivered. The Azure Notification Hubs Service accepts any point of time between now + 5 minutes and now + 7 days.
var scheduledDate = DateTimeOffset.UtcNow.AddHours(12);
var jsonPayload = "{\"aps\":{\"alert\":\"Notification Hub test notification\"}}";
var n = new AppleNotification(jsonPayload);
ScheduledNotification outcome = await hub.ScheduleNotificationAsync(n, scheduledDate);await hub.CancelNotificationAsync(outcome.ScheduledNotificationId);Note: This feature is only available for STANDARD Tier.
Sometimes it is required to perform bulk operation against registrations. Usually it is for integration with another system or just to update the tags. It is strongly not recommended to use Get/Update flow if you are modifying thousands of registrations. Import/Export capability is designed to cover the scenario. You provide an access to some blob container under your storage account as a source of incoming data and location for output.
var job = new NotificationHubJob
{
JobType = NotificationHubJobType.ExportRegistrations,
OutputContainerUri = new Uri("container uri with SAS signature"),
};
job = await hub.SubmitNotificationHubJobAsync(job);var job = new NotificationHubJob
{
JobType = NotificationHubJobType.ImportCreateRegistrations,
ImportFileUri = new Uri("input file uri with SAS signature"),
OutputContainerUri = new Uri("container uri with SAS signature")
};
job = await hub.SubmitNotificationHubJobAsync(job);while (true) {
await Task.Delay(1000);
job = await hub.GetNotificationHubJobAsync(job.JobId);
if (job.Status == NotificationHubJobStatus.Completed) {
break;
}
}var allJobs = await hub.GetNotificationHubJobsAsync()Microsoft Azure Notification Hubs Docs
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