IsolatedStorageFile.GetMachineStoreForDomain 方法

定義

命名空間:

System.IO.IsolatedStorage

組件:

System.IO.IsolatedStorage.dll

來源:

IsolatedStorageFile.cs

取得對應於應用程式定義域識別和組件識別的機器範圍隔離儲存區。

public:
 static System::IO::IsolatedStorage::IsolatedStorageFile ^ GetMachineStoreForDomain();

public static System.IO.IsolatedStorage.IsolatedStorageFile GetMachineStoreForDomain ();

static member GetMachineStoreForDomain : unit -> System.IO.IsolatedStorage.IsolatedStorageFile

Public Shared Function GetMachineStoreForDomain () As IsolatedStorageFile

傳回

IsolatedStorageFile

對應至 IsolatedStorageScope 的物件，該物件以應用程式定義域識別和組件識別的組合為基礎。

例外狀況

SecurityException

尚未授與足夠的隔離儲存區使用權限。

IsolatedStorageException

無法開啟存放區。

-或-

指定組件沒有足夠的使用權限建立隔離存放區。

-或-

無法判斷應用程式定義域的使用權限。

-或-

無法初始化隔離的儲存區位置。

範例

下列程式代碼範例示範 GetUserStoreForDomain 方法。 如需此範例的完整內容，請參閱概 IsolatedStorageFile 觀。

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

備註

在不同應用程式的內容中使用時，相同的元件程式代碼會使用不同的隔離存放區。

GetMachineStoreForDomain 在功能上相當於下列程式代碼：

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)

在相同應用程式域內執行的不同元件一律具有不同的隔離存放區。

注意

GetUserStoreForDomain如果安裝元件的應用程式域沒有 IsolatedStorageFilePermission，則會傳回IsolatedStorageFile沒有配額的物件。 稍後嘗試使用IsolatedStorageFile沒有配額的物件來建立 IsolatedStorageFile 物件，將會失敗。IsolatedStorageException

另請參閱

• 隔離儲存區