Handle low storage space condition

[Kunal Prime]

Hi All,

I want to handle low storage space condition(isolated storage not ram memory) in my application. So if this case happens do i get some notification from system? Or do i need to set up a timer to check this every now and then myself. Searching for this i got only about handling low ram memory conditions. Please help

Regards

[Loukt]

Hello Kunal as far as I know, there is IsolatedStorageFile.GetUserStoreForApplication().AvailableFreeSpace which return the available space on the phone, and
IsolatedStorageFile.GetUserStoreForApplication().IncreaseQuotaTo() which helps increase the quota allowed (returns a bool, true if increased else it returns false)

[Kunal Prime]

Hi Loukt,

So i need to check and handle these conditions by myself using timer or some other logic right.? System will not convey me by raising some event when IsolatedStorageFile.GetUserStoreForApplication().AvailableFreeSpace becomes low.

Regards

[Loukt]

Hi Loukt,

So i need to check and handle these conditions by myself using timer or some other logic right.? System will not convey me by raising some event when IsolatedStorageFile.GetUserStoreForApplication().AvailableFreeSpace becomes low.

Regards

Hello Kunal,

not necessary a timer, but each time you want to write on the IsolatedStorageFile

use this snippet to check if there is enough disk space, (I think neededSpace needs to be the byte value, as for 1Mb => 1*1024*1024 bytes )

public void CheckDiskSpace(long neededSpace)
{
    using (IsolatedStorageFile myISFile = IsolatedStorageFile.GetUserStoreForApplication())
    {
        if (myISFile.AvailableFreeSpace > neededSpace)
        {
            if (!myISFile.IncreaseQuotaTo(myISFile.Quota + neededSpace)) // newSpace = oldSpace(myISFile.Quota) + neededSpace
            {
                throw new Exception("No space available on the phone, please delete a file");
            }
        }
    }
}

I've just wrote it and didn't test it yet, you can run it and give us feedback.

Yassine,

[Kunal Prime]

Hi Yassine,

Thanks, will test this snippet and let you know.

Regards

[Kunal Prime]

Hi Yassine,

Used below code

using (IsolatedStorageFile myISFile = IsolatedStorageFile.GetUserStoreForApplication())
{
if (myISFile.AvailableFreeSpace < neededSpace)
{
long newSpace = myISFile.Quota + 10485760L;
if (!myISFile.IncreaseQuotaTo(newSpace))
{
throw new Exception("No space available on the phone, please delete a file");
}
else
{
Debug.WriteLine(myISFile.Quota);
}
}
}

But it throws me below exception.

{System.ArgumentException: The new quota must be larger than the old quota.
at System.IO.IsolatedStorage.IsolatedStorageFile.IncreaseQuotaTo(Int64 newQuotaSize)
at SharedCode.IsolatedStorageAccess.FileStore.CheckDiskSpace(Int64 neededSpace)
at Marketplace.LandingPage..ctor()} System.Exception {System.ArgumentException}

While debugging i found myISFile.Quota returns 9223372036854775807 which is the maximum possible value for a signed long. So when we add anything to it appends a minus sign to indicate a bigger number. So initially myISFile.Quota = 9223372036854775807 and after adding 10MB, newSpace = -9223372036844290049. Which myISFile.IncreaseQuotaTo considers less than earlier quota and throws the exception. :P

Any thoughts or suggestions on this.??

And sorry i don't know how to embed code in reply so putting them in [QUOTE] tags.

Regards