Difference between Windows.Storage.ApplicationData.current and WinJS.Application.local

Question

Hello everybody,

what difference is there between Windows.Storage.ApplicationData.current and WinJS.Application.local? Both provide access to the app's local storage, don't they?

Also, is there a WinJS.Application.sessionState equivalent in C#/VB/C++? That is, a fast in-memory data structure? What about indexedDB? Is there something similiar in C#/VB/C++?

Thanks!
Best Regards
--Oliver.

Answer 1

You have the option of storing local, roaming or temp data for your application.  See this:

http://msdn.microsoft.com/en-us/library/windows/apps/hh465109.aspx

Windows.Storage.ApplicationData.current is the application package storage (the application you deploy and it's resources) which is different from your app data you would store and access when running.  http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.applicationdata.current.asp

WinJS.Application.local is the same as localfolder: http://msdn.microsoft.com/en-us/library/windows/apps/windows.storage.applicationdata.localfolder.aspx

See the example at the end of the previous document to see both being used.

-Jeff

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Jeff Sanders (MSFT)

Answer 2

Thanks Jeff!

So that means besides local/roaming/temporary data storage there is no session state or indexedDB in C#/VB/C++ (like in JS) ?

Also, when suspending a C#/VB/C++ app, variables and data structures are automatically saved, aren't they? Whereas in JS I have to manually store them in sessionState in case of an suspend event? Is this correct?

Answer 3

You are welcome!

Briefly, you need to handle the application state in those other languages.  See this information: http://msdn.microsoft.com/en-us/library/windows/apps/hh464925.aspx for a good overview of this.

For specific questions about those languages you would be best served asking questions in those forums.

IndexedDb is an HTML/JavaScript paradigm.  If you need similar storage there are a couple of different options (of course you can use JSON and local storage.  Again, please direct your other questions to those other language forums for more information.

-Jeff

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Jeff Sanders (MSFT)