IsolatedStorageFile.GetMachineStoreForDomain Method
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Obtains machine-scoped isolated storage corresponding to the application domain identity and the assembly identity.
public:
static System::IO::IsolatedStorage::IsolatedStorageFile ^ GetMachineStoreForDomain();public static System.IO.IsolatedStorage.IsolatedStorageFile GetMachineStoreForDomain();static member GetMachineStoreForDomain : unit -> System.IO.IsolatedStorage.IsolatedStorageFilePublic Shared Function GetMachineStoreForDomain () As IsolatedStorageFileAn object corresponding to the IsolatedStorageScope, based on a combination of the application domain identity and the assembly identity.
Sufficient isolated storage permissions have not been granted.
The store failed to open.
-or-
The assembly specified has insufficient permissions to create isolated stores.
-or-
The permissions for the application domain cannot be determined.
-or-
An isolated storage location cannot be initialized.
The following code example demonstrates the GetUserStoreForDomain method. For the complete context of this example, see the IsolatedStorageFile overview.
IsolatedStorageFile^ isoFile;
isoFile = IsolatedStorageFile::GetUserStoreForDomain();
// Open or create a writable file.
IsolatedStorageFileStream^ isoStream = gcnew IsolatedStorageFileStream( this->userName,FileMode::OpenOrCreate,FileAccess::Write,isoFile );
StreamWriter^ writer = gcnew StreamWriter( isoStream );
writer->WriteLine( this->NewsUrl );
writer->WriteLine( this->SportsUrl );
// Calculate the amount of space used to record the user's preferences.
double d = isoFile->CurrentSize / isoFile->MaximumSize;
Console::WriteLine( "CurrentSize = {0}", isoFile->CurrentSize.ToString() );
Console::WriteLine( "MaximumSize = {0}", isoFile->MaximumSize.ToString() );
writer->Close();
isoFile->Close();
isoStream->Close();
return d;
IsolatedStorageFile isoFile;
isoFile = IsolatedStorageFile.GetUserStoreForDomain();
// Open or create a writable file.
IsolatedStorageFileStream isoStream =
new IsolatedStorageFileStream(this.userName,
FileMode.OpenOrCreate,
FileAccess.Write,
isoFile);
StreamWriter writer = new StreamWriter(isoStream);
writer.WriteLine(this.NewsUrl);
writer.WriteLine(this.SportsUrl);
// Calculate the amount of space used to record the user's preferences.
double d = isoFile.CurrentSize / isoFile.MaximumSize;
Console.WriteLine("CurrentSize = " + isoFile.CurrentSize.ToString());
Console.WriteLine("MaximumSize = " + isoFile.MaximumSize.ToString());
// StreamWriter.Close implicitly closes isoStream.
writer.Close();
isoFile.Dispose();
isoFile.Close();
return d;
Dim isoFile As IsolatedStorageFile
isoFile = IsolatedStorageFile.GetUserStoreForDomain()
' Open or create a writable file.
Dim isoStream As New IsolatedStorageFileStream(Me.userName, FileMode.OpenOrCreate, _
FileAccess.Write, isoFile)
Dim writer As New StreamWriter(isoStream)
writer.WriteLine(Me.NewsUrl)
writer.WriteLine(Me.SportsUrl)
' Calculate the amount of space used to record the user's preferences.
Dim d As Double = Convert.ToDouble(isoFile.CurrentSize) / Convert.ToDouble(isoFile.MaximumSize)
Console.WriteLine(("CurrentSize = " & isoFile.CurrentSize.ToString()))
Console.WriteLine(("MaximumSize = " & isoFile.MaximumSize.ToString()))
' StreamWriter.Close implicitly closes isoStream.
writer.Close()
isoFile.Dispose()
isoFile.Close()
Return d
The same assembly code will use different isolated stores when used in the context of different applications.
GetMachineStoreForDomain is functionally equivalent to the following code:
isoFile = IsolatedStorageFile::GetStore(IsolatedStorageScope::Assembly |
IsolatedStorageScope::Domain | IsolatedStorageScope::Machine,
(Type^)nullptr, (Type^)nullptr);
isoFile = IsolatedStorageFile.GetStore(IsolatedStorageScope.Assembly |
IsolatedStorageScope.Domain | IsolatedStorageScope.Machine,
null, null);
isoFile = IsolatedStorageFile.GetStore(IsolatedStorageScope.Assembly Or _
IsolatedStorageScope.Domain Or IsolatedStorageScope.Machine, _
Nothing, Nothing)
Different assemblies running within the same application domain always have distinct isolated stores.
Note
GetUserStoreForDomain will return an IsolatedStorageFile object without a quota if the application domain into which the assembly is installed does not have IsolatedStorageFilePermission. Later attempts to create an IsolatedStorageFile object using the IsolatedStorageFile object that does not have a quota will fail with an IsolatedStorageException.
| Product | Versions |
|---|---|
| .NET | Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 2.0, 2.1 |
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