Could I use the timer background task without lock screen permissions？

Question

I use the timer trigger background task,and request lock screen permissions.But when I call BackgroundExecutionManager::RequestAccessAsync(),a dialog pop up.Is there anyway that do not pop up the dialog when I use this API?

Answer 1

No. The user gets to control which apps have are on the lock screen. There is no way for an app to force this without the user's permission.

--Rob

Answer 2

hi,Rob

In my application,I want do something every 15 minutes.So I use the timer background task,but the timer trigger required lock screen permission.When first run my application,I call BackgroundExecutionManager::RequestAccessAsync() to requre this permission,but there always pop a dialog.And in windows 8 RP,the samples pre-installed by miscrosoft had this permission,but I don't see them pop this dialog.So I want to konw how they implement and whether I can do.

How to implement

Answer 3

There is no way for an app to set this programmatically. The user has control over which apps appear on the lock screen.

Calling BackgroundExecutionManager::RequestAccessAsync() and letting the user choose to allow the app or not is the appropriate thing to do.

When you set up a system image you can preinstall apps and set this state, but I don't know the details beyond that it cannot be done after the fact. For more information about setting up an image see Service a Windows Image . Doing so isn't an app development topic, so please post any questions you have about how to do this in the appropriate Windows 8 Installation, Setup, and Deployment forum on TechNet.

--Rob

Answer 4

Thanks,Rob.

I also had some questions about timer trigger background task.Is there anyway that I can use timer trigger background task without lock screen permission?I don't want my application pop the dialog.It's annoying.

It's annoying

Answer 5

No you cannot.

Please review this document to get a good idea of what you can do with background tasks and their requirements:

http://www.microsoft.com/en-us/download/details.aspx?id=27411

-Jeff

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Jeff Sanders (MSFT)

Answer 6

Thanks,jpsanders.

I got it.