javascript - WinJS app with C# background task for push notifications -

i'm trying create background task push notifications in c# linked winjs app (before asking: reason not in js because bug in windows phone runtime, see here).

here first draft:

public sealed class mypushnotificationbgtask : ibackgroundtask {  public void run(ibackgroundtaskinstance taskinstance) {     rawnotification notification = (rawnotification)taskinstance.triggerdetails;     string content = notification.content;      debug.writeline("received push notification c# bg task!");      var settings = applicationdata.current.localsettings;     settings.values["push"] = content;      raisetoastnotification(content); }  private void raisetoastnotification(string text) {     xmldocument toastxml = toastnotificationmanager.gettemplatecontent(toasttemplatetype.toasttext01);      xmlnodelist elements = toastxml.getelementsbytagname("text");     foreach (ixmlnode node in elements){         node.innertext = text;     }      toastnotification notification = new toastnotification(toastxml);     toastnotificationmanager.createtoastnotifier().show(notification); } } 

but there questions remaining:

• how integrate winjs app? adding reference , adding appxmanifest? or need register task manually accessing like

  var task = new libraryname.mypushnotificationbgtask();

• can access same localsettings backgroundtask when defined in appxmanifest? clicking on raised notification cause opening the(correct) app?

thanks in advance!

typically you'd having c# background task project part of same vs solution, , add reference js app project background task project.

i recommend not ever instantiating c# component/class js app, not necessary background task, , should avoid having pull in weight of clr , associated cost performance/memory/etc.

in manifest editor, you'll want add declaration background task, , specify "entry point" "libraryname.mypushnotificationbgtask". don't specify executable or start page fields.

in js code (probably sometime after app startup), you'll want register task. example:

var bg = windows.applicationmodel.background; var taskbuilder = new bg.backgroundtaskbuilder(); var trigger = new bg.pushnotificationtrigger(); taskbuilder.settrigger(trigger); // must match class name , registration in manifest taskbuilder.taskentrypoint = "libraryname.mypushnotificationbgtask"; taskbuilder.name = "pushnotificationbgtask"; taskbuilder.register(); 

there apis enumerating tasks (so can see if you've registered it/them), clearing them, etc. there few different techniques avoid registering them multiple times, i'm guessing can figure part out :-)