CODEWITHSUNDEEP
silverlightisolatedstorage
Joe White
Joe White

Reputation: 97778

Silverlight isolated storage: what identifies an "application"?

The docs for Silverlight's IsolatedStorageFile.GetUserStoreForApplication just say that the isolated storage is specific to the "application", and that each different application will have its own storage independent of all other "applications" (but with one quota for the entire domain).

That's great, but I haven't found anything yet that explains just what "application" is supposed to mean (either in the Silverlight docs or the regular .NET Framework docs). What information does Silverlight, in particular, use to decide that "this is application A" and "this is application B"? Does it just go off the URI to the .xap file, or what?

Upvotes: 1

Views: 1025

Answers (4)

eliza sahoo
eliza sahoo

Reputation: 1

We can use Isolated Storage as a virtual file system to store data in a hidden folder on our machine in silverlight application. Silverlight application is allocated the storage of 1 MB per application but we can increase the amount of storage. This is the function to get the data in the isolated storage

  Private Function LoadData(ByVal fileName As String) As String
        Dim data As String = String.Empty
        Dim isfstream As New IsolatedStorageFileStream(fileName, FileMode.Open, IsolateStorageFileObj)
        Dim sr As New StreamReader(isfstream)
        data = sr.ReadLine()
        Return data
  End Function

Upvotes: 0

Braulio
Braulio

Reputation: 1728

Yups, you have to types of isolated storages:

--> One is related to the xap url, in theory is that way, but I found a nasty surprise when using it.

--> The other one is common to your site (url from your site).

In theory you won't get any issue, but if you have problems with the application one (in my case when I made a new deploy the iso got wiped :-(), check out this posts:

http://www.tipsdotnet.com/TechBlog.aspx?PageIndex=0&BLID=13

http://silverlight.net/forums/p/86003/200941.aspx#200941

Upvotes: 1

KnownIssues
KnownIssues

Reputation: 61

According to the MSDN article for the IsolatedStorageFile class, "Isolated stores are scoped to particular assemblies." Your application is an assembly (your XAP file). An assembly has an assembly manifest that uniquely identifies it.

Upvotes: 0

scottheckel
scottheckel

Reputation: 9244

Think of it as the URL. If the URL is different the application's isolated storage will be different. You can change the metadata and such in the file all you want. Just not the filename/location of it. If I remember right you could even put a different XAP at the same URL and it will take the previous one's isolated storage.

Upvotes: 1

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