Sporadic UnauthorizedAccessException on IsolatedStorage

Android
1

I have a weird issue with savegames. This only happens once, when the app is freshly installed - restarting the app solves the issue and saving works just fine. It also happens just on some devices.

This is the code used - I think it’s straightforward:

using (IsolatedStorageFile storage = IsolatedStorageFile.GetStore(IsolatedStorageScope.User | IsolatedStorageScope.Assembly, null, null))
                {
                    using (IsolatedStorageFileStream fs = storage.OpenFile(filename, System.IO.FileMode.Create))
                    {
                        fs.Write.....

afaik the exception is thrown at FileStream creation - any ideas would could be wrong? What puzzles me, is that it works once, tha app is restarted (and not running for the first time)

2

noone an idea what could be the cause of this error - I think I use it correctly but maybe I do something wrong?

3

Does not seem related to MonoGame thus, maybe, the lack of answers.

4

Not really related I guess - but as most games need some sort of saving the gamestate, I was hoping someone had a similar issue together with a solution :slight_smile:

5

I recently read some stuff about Robo Miner 2 (a tweet I think) that mentioned a similar issue.

PS :
The link https://play.google.com/store/apps/details?id=com.rnet.robominer2.
And your are the author of Robo Miner 2 :slight_smile:

Does the user need to authorize your app to access storage ?

6

oh no - bad publicity spreads :slight_smile:

I do actually not require any permissions for file saving, because afaik, there aren’t any for writing to internal storages’ app-space.

Not sure if my used StorageScope does somehow still need some special permissions to be set … but that’s at least a new direction to investigate into.

7

omg … soution found - and it’s pretty simple (and I am stupid)

I some condition I supply an empty filename … which results in unauthorizedaccess Exception

8

Great !

I can remove the reference to your game if you want :wink:

9

na, it’s ok, I did a showcase here anyway, so everyone knows :slight_smile: