I have written a Windows 7.5 phone app that registers for tile and toast push notifications with MPNS. I have all the infrastructure working and the phone registers with MPNS. I save the ChannelUri locally on the phone and then post the ChannelUri to a rest service endpoint on my website which records the device / ChannelUri. I'm able to send toast and tile messages from the web service and receive them on the phone without any problem. If the application is running I'm able to trap the ShellToastNotificationReceived event and can read the push notification details and I save the message to a local database in the application and the messages are also displayed to the user in a Listbox. The system is disconnected from my website other than having to register the ChannelUri and all the data I need is contained with the notification.
My question is when the application has been tombstoned and I send a push notification I see a toast message displayed by the phone OS and if I click on the toast I have put a URI pointing to a page in my application and this re-launchs the app and I can trap all the data in the message and can save it again to the database. But if the application is tombstoned and the user misses the toast I have no way of saving that message it is lost unless I write some logic to go back to my server and check if the messages I have locally match the ones it sent. Am I missing something or am I going to have to run a check with my server when the app re-launches and re-sync with my server for any toast push notifications the user might have missed.
Thanks
When a push notification is received while the application is not running or is tombstoned there is no way to handle the data if nothing was done with the missed toast. You might need confirmation logic on the server to check whether the message is received or not.
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I am working on windows development & I am displaying the items on the emulator by using a web service.
Now I want to send a toast notification when an item added to the service. Already I worked with push notifications. But It’s generating push channel URL when app is initialized.
I don’t want to use this channel URL. So I tried Background Agent & Shell Toast to send the notification. Its working fine for static data. How can I add dynamic data to back ground agent which is coming from web service?
One more thing is, there are two things like PeriodicTask & ResourceIntensiveTask. How can I use this to send a toast notification by using Background Agent?
You can refer to this Tutorial From Nokia
http://developer.nokia.com/community/wiki/How_to_create_simple_Background_Agent_in_Windows_Phone
and this from CodeProject
http://www.codeproject.com/Articles/656654/Windows-Phone-Background-Agent-Part-Periodic-T
My WP7 app needs to handle different types of push notification. Some of these are only relevant when the app is running but one type serves as a prompt to the user to start the app as well as needing to be handled while the app is running. Hence, when opening the push channel, my code calls BindToShellToast and registers event handlers for when both raw and toast notifications are received:
if (!_pushChannel.IsShellToastBound)
{
_pushChannel.BindToShellToast();
}
_pushChannel.HttpNotificationReceived += new EventHandler<HttpNotificationEventArgs>(pushChannel_HttpNotificationReceived);
_pushChannel.ShellToastNotificationReceived += new EventHandler<NotificationEventArgs>(pushChannel_ShellToastNotificationReceived);
Looking at the certification requirements, it appears that I have to provide a user setting to allow them to enable/disable not only push notifications in general, but also specifically toast notifications. See Additional requirements for specific app types for Windows Phone (requirement 6.2.1)
Since the user could potentially enable general push notifications but disable toast notifications, it seems to me that my server would need to send both a raw and a toast notification for the type that needs to be handled when the app is not running. This would make registering for the ShellToastNotificationReceived event pointless. Is my thinking correct here?
You should store a settings on your server for each registered device naming what type of notification the user allowed.
I'm testing out Windows Phone 7.5 push notifications. I have got the 3 different push types working fine (Toast, Tile and Raw) and am able to send messages from unit tests and a web application without any problems and receive them in my WP application. I want the ability to add extra properties to the push notification and the Raw push type does this perfectly for me and I can add custom key/value pairs or anything else to the push message and extract it on the phone app. I have just found out however that it only works if the application is running and my unit tests fail (suppressed notification status is received in unit test) when the phone application is not running (checked documentation which confirms this too). Is there anyway to add extra properties (key/values) to toast or tile messages or some way I can use raw in another way ? Toast notifications seem limited to a title property and an actual message property but I need to add additional data.
Just wondering if anyone had any suggestions / workarounds ?
The general practice I use is to initially send a raw notification to the device with phone-usable data embedded in the message. If my application is currently running then I can process the contents of the raw message and immediately make use of it on the phone. However if the application is not currently running on the phone you will receive notification from the push servers that the message could not be delievered. If I receive this response I send out a Toast / Tile notification.
With Toast notifications the only parametrisation you have access to is the URI that will launch the application. This is specified with the wp:param node of the message. Eg.
<wp:Notification xmlns:wp="WPNotification">
<wp:Toast>
<wp:Text1>Toast Title</wp:Text1>
<wp:Text2>Toast sub title</wp:Text2>
<wp:Param>/MainPage.xaml?LaunchedFrom=A%20Toast%20Notification</wp:Param>
</wp:Toast>
</wp:Notification>
If the user taps on this toast notification your application will launch and navigate to MainPage.xaml. You can access the querystring passed in via the NavigationContext.QueryString.
Note: The wp:Param node can only be sent to Mango (and up) devices. Additionally the entire contents must be less than 256 characters or you'll receive a PushErrorTypeMessageBadContent error. (Thanks to Ritch Melton for pointing this out). More info available from the Sending Push Notifications for Windows Phone page on MSDN.
As you've discovered, the Microsoft Push Notification Service is very strict in what types of messages you can send and receive. The intent of these push notifications is to provide simple push updates and not large amounts of data. The flexible Raw type seems like it would fit the bill until you discover that:
You can use a raw notification to send information to your application. If your application is not currently running, the raw notification is discarded on the Microsoft Push Notification Service and is not delivered to the device.
However, if you send a toast notification to your application, when the user clicks on the toast the application is started. When your application starts, you should check a service and retrieve the data you are trying to send from a web-service or other remote mechanism.
I have a toast notification system that is working on WP7. When I send a notification, all registered devices receive the toast notification.
But, If someone uninstall the application, I will continue to try to send to the registered device (in fact, I will ask Microsoft service to send to the unavailable device).
Is it possible to detect if someone uninstall the app, then I can remove it from my list of device to send.
Or maybe can Ms services tell me if the app as unsuscribe to the toast notification ?
My list of registered device grows infinitely ....
Thanks in advance for any Help,
Best regards
You can't detect if the user deleted the app, but can always check the subscription status return code when you send a notification!
Check here for the return codes, specifically where the SubscriptionStatus != Active
I am thinking of a simple chat application in Window Phone using Microsoft Push Notification Service.
I read a guide at http://msdn.microsoft.com/en-us/library/hh202967(v=VS.92).aspx which talks about creating a client application that receive toast notification.
This is a first time for me to develop a mobile application so I do not get some part of it.
The question that I have is, is it possible for a client (window phone) to send toast notification directly to other client? I have found below image from the web. It seems that I need to have Cloud Application(probably webserver?) to play with notification service.
Would it be possible to build a Window phone application that directly request to MPNS to send notification to other window phone application? (so from the picture above, '2' will directly point to Microsoft Push Notification Service)
If it is not, what is the reason for that?
There is a good explanation of the push notification service here.
From the above link.
Registration Phase 2: Now that the MPNS known the presence of the
phone on the network, it is required the phone itself provide the Uri
to the Earthquake service. Until this not happen the service doesn't
know there is a phone that need to be notified so it is not able to
provide the notifications. The phone must call a method on the
Earthquake service to provide the Uri that has been answered by the
MPNS. Once the Earthquake service gets this url it can store this
informations somewhere for a later use.
In your case you'll need communication between your devices before any notifications can be sent. This is to know the uri of your phone. A server has to store these uris for all devices registered for notifications. This is why you'll need an application which sends the xml to the MPNS.