Windows 8 Store Apps Learning (67) Background tasks: Push notifications

Introduced

Re-imagine Windows 8 Store Apps after a task

Push notification

Example

1. Client

Backgroundtask/pushnotification.xaml

<page x:class= "XamlDemo.BackgroundTask.PushNotification" xmlns= "http://schemas.microsoft.com/winfx/2006/xaml/
    Presentation "xmlns:x=" Http://schemas.microsoft.com/winfx/2006/xaml "xmlns:local=" Using:XamlDemo.BackgroundTask " Xmlns:d= "http://schemas.microsoft.com/expression/blend/2008" xmlns:mc= "http://schemas.openxmlformats.org/ markup-compatibility/2006 "mc:ignorable=" D "> <grid background=" Transparent "> <stackpanel margin= "0 0 0" > <textblock name= "lblmsg" fontsize= "14.667" textwrapping= "Wrap"/&G
                
            T
                
            <button name= "Btncreatechannel" content= "Create the Channel" margin= "0 0 0" click= "Btncreatechannel_click"/> <textbox name= "Txturi" margin= "0 0"/> <image Sour
   Ce= "Wns.png" margin= "0 0 0" horizontalalignment= "left" width= "a"/> </StackPanel> </Grid> </Page> 

Backgroundtask/pushnotification.xaml.cs

* * Demonstrates how to receive push notification * * NOTE: * Need to add background task declaration in package.appxmanifest and check "push notification" * After the application is created in the Win8 store, you need to copy the identity of the app's store to the Package.appxmanifest Identity Node * cannot run in emulator * New channel is valid for 30 days * * Wns-windows Push Notification S
Ervice * Push notification service side see: webserver/pushnotification within the file * * using System;
Using Windows.ApplicationModel.Background;
Using Windows.Networking.PushNotifications;
Using Windows.UI.Notifications;
Using Windows.UI.Popups;
Using Windows.UI.Xaml;
    
Using Windows.UI.Xaml.Controls; Namespace Xamldemo.backgroundtask {public sealed partial class Pushnotification:page {public pushnotif Ication () {this.
        InitializeComponent ();  Private async void Btncreatechannel_click (object sender, RoutedEventArgs e) {//When a push is received Raw notification, if the app is in the lock screen, you can trigger the background task to perform the associated logic (pushnotificationtrigger) backgroundaccessstatus status = Backgroundexecu
           Tionmanager.getaccessstatus (); if (status = = backgroundaccessstatus.unspecified) {status = await Backgroundexecutionmanager .
            Requestaccessasync ();  } if (status = = Backgroundaccessstatus.denied) {await new Messagedialog ("Please first add this app Add to lock Screen ").
                Showasync ();
            Return
            //Create a push notification channel, each new channel is valid for 30 days, so it is recommended to rebuild a channel each time you enter the app (but if you need to pay attention to a shorter interval, you'll be able to reuse the previous channel) Pushnotificationchannel channel = await
            Pushnotificationchannelmanager.createpushnotificationchannelforapplicationasync (); Channel The event that is triggered after the notification is received.
    
            Pushnotificationreceived + = channel_pushnotificationreceived; Channel. Close (); Close Channel//View more highlights of this column: http://www.bianceng.cnhttp://www.bianceng.cn/Programming/net///Channel. Expirationtime; Channel expiration time, after which channel is invalidated//channel URI address, and the server pushes notifications to this app via this URI txturi.text = C Hannel. Uri.ToString (); } void Channel_pushnotificationreceived (Pushnotificationchannel sender, Pushnotificationreceivedeventargs arg s) {switch (args). NotificationType) {case Pushnotificationtype.badge://Badge notification BADGEUPDA Temanager.createbadgeupdaterforapplication (). Update (args.
                    Badgenotification);
                Break Case PUSHNOTIFICATIONTYPE.RAW://RAW notification//When the raw notification is received, if the app is in the lock screen, the background task can be triggered to perform the relevant logic (Pushnotificati Ontrigger) String msg = args.
                    Rawnotification.content;
                Break Case Pushnotificationtype.tile://Tile Notice tileupdatemanager.createtileupdaterforapplication (). Update (args.
                    Tilenotification);
                Break Case Pushnotificationtype.toast://Toast Notice toastnotificationmanager.createtoastnotifier (). Show (args.
        Toastnotification);            Break
            Default:break; } args.            
        Cancel = true; }
    }
}

Package.appxmanifest

<?xml version= "1.0" encoding= "Utf-8"?> <package xmlns=
"http://schemas.microsoft.com/appx/2010/" Manifest ">
  <!--The following borrows the identity of" greedy snake "to demonstrate push notification-->
  <!--identity Name=" 10437webabcd.173815756dd78 "publisher=" cn=27514dec-c708-4edb-bfea-f956384483d0 "Version=" 1.0.0.0 "/-->
  " <identity name= "Webabcd.win8.XamlDemo" publisher= "Cn=wanglei" version= "1.0.0.0"  />
</Package>

2. Service End

Webserver/pushnotification/oauthtoken.cs