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IsolatedStorageFileStream.Handle Özellik

Tanım

Dikkat

This property has been deprecated. Please use IsolatedStorageFileStream's SafeFileHandle property instead. https://go.microsoft.com/fwlink/?linkid=14202

Dikkat

IsolatedStorageFileStream.Handle has been deprecated. Use IsolatedStorageFileStream's SafeFileHandle property instead.

Dikkat

This property has been deprecated. Please use IsolatedStorageFileStream's SafeFileHandle property instead. http://go.microsoft.com/fwlink/?linkid=14202

Geçerli IsolatedStorageFileStream nesnenin kapsüllediğini dosyanın dosya tanıtıcısını alır. Bir nesnede IsolatedStorageFileStream bu özelliğe erişime izin verilmez ve bir IsolatedStorageExceptionoluşturur.

public:
 virtual property IntPtr Handle { IntPtr get(); };
[System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  https://go.microsoft.com/fwlink/?linkid=14202")]
public override IntPtr Handle { get; }
[System.Obsolete("IsolatedStorageFileStream.Handle has been deprecated. Use IsolatedStorageFileStream's SafeFileHandle property instead.")]
public override IntPtr Handle { get; }
[System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  http://go.microsoft.com/fwlink/?linkid=14202")]
public override IntPtr Handle { get; }
public override IntPtr Handle { get; }
[System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  http://go.microsoft.com/fwlink/?linkid=14202")]
public override IntPtr Handle { [System.Security.SecurityCritical] get; }
[<System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  https://go.microsoft.com/fwlink/?linkid=14202")>]
member this.Handle : nativeint
[<System.Obsolete("IsolatedStorageFileStream.Handle has been deprecated. Use IsolatedStorageFileStream's SafeFileHandle property instead.")>]
member this.Handle : nativeint
[<System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  http://go.microsoft.com/fwlink/?linkid=14202")>]
member this.Handle : nativeint
member this.Handle : nativeint
[<System.Obsolete("This property has been deprecated.  Please use IsolatedStorageFileStream's SafeFileHandle property instead.  http://go.microsoft.com/fwlink/?linkid=14202")>]
[<get: System.Security.SecurityCritical>]
member this.Handle : nativeint
Public Overrides ReadOnly Property Handle As IntPtr

Özellik Değeri

IntPtr

nativeint

Geçerli IsolatedStorageFileStream nesnenin kapsüllediğini dosyanın dosya tanıtıcısı.

Öznitelikler

Özel durumlar

Handle özelliği her zaman bu özel durumu oluşturur.

Örnekler

Aşağıdaki kod örneği özelliğini gösterir Handle .

[SecurityPermissionAttribute(SecurityAction::Demand, Flags=SecurityPermissionFlag::UnmanagedCode)]
bool GetPrefsForUser()
{
   try
   {
      
      // Retrieve an IsolatedStorageFile for the current Domain and Assembly.
      IsolatedStorageFile^ isoFile = IsolatedStorageFile::GetStore( static_cast<IsolatedStorageScope>(IsolatedStorageScope::User | IsolatedStorageScope::Assembly | IsolatedStorageScope::Domain), (Type^)nullptr, nullptr );
      IsolatedStorageFileStream^ isoStream = gcnew IsolatedStorageFileStream( this->userName,FileMode::Open,FileAccess::ReadWrite,isoFile );
      
      // farThe code executes to this point only if a file corresponding to the username exists.
      // Though you can perform operations on the stream, you cannot get a handle to the file.
      try
      {
         IntPtr aFileHandle = isoStream->Handle;
         Console::WriteLine( "A pointer to a file handle has been obtained. {0} {1}", aFileHandle, aFileHandle.GetHashCode() );
      }
      catch ( Exception^ e ) 
      {
         
         // Handle the exception.
         Console::WriteLine( "Expected exception" );
         Console::WriteLine( e->ToString() );
      }

      StreamReader^ reader = gcnew StreamReader( isoStream );
      
      // Read the data.
      this->NewsUrl = reader->ReadLine();
      this->SportsUrl = reader->ReadLine();
      reader->Close();
      isoFile->Close();
      isoStream->Close();
      return false;
   }
   catch ( Exception^ e ) 
   {
      
      // Expected exception if a file cannot be found. This indicates that we have a new user.
      String^ errorMessage = e->ToString();
      return true;
   }

}
private bool GetPrefsForUser()
{
    try
    {

        // Retrieve an IsolatedStorageFile for the current Domain and Assembly.
        IsolatedStorageFile isoFile =
            IsolatedStorageFile.GetStore(IsolatedStorageScope.User |
            IsolatedStorageScope.Assembly |
            IsolatedStorageScope.Domain,
            null,
            null);

        IsolatedStorageFileStream isoStream =
            new IsolatedStorageFileStream("substituteUsername",
            System.IO.FileMode.Open,
            System.IO.FileAccess.Read,
             System.IO.FileShare.Read);

        // The code executes to this point only if a file corresponding to the username exists.
        // Though you can perform operations on the stream, you cannot get a handle to the file.

        try
        {

            SafeFileHandle aFileHandle = isoStream.SafeFileHandle;
            Console.WriteLine("A pointer to a file handle has been obtained. "
                + aFileHandle.ToString() + " "
                + aFileHandle.GetHashCode());
        }

        catch (Exception e)
        {
            // Handle the exception.
            Console.WriteLine("Expected exception");
            Console.WriteLine(e);
        }

        StreamReader reader = new StreamReader(isoStream);
        // Read the data.
        this.NewsUrl = reader.ReadLine();
        this.SportsUrl = reader.ReadLine();
        reader.Close();
        isoFile.Close();
        return false;
    }
    catch (System.IO.FileNotFoundException)
    {
        // Expected exception if a file cannot be found. This indicates that we have a new user.
        return true;
    }
}
Private Function GetPrefsForUser() As Boolean
    Try
        ' Retrieve an IsolatedStorageFile for the current Domain and Assembly.
        Dim isoFile As IsolatedStorageFile = _
            IsolatedStorageFile.GetStore(IsolatedStorageScope.User _
            Or IsolatedStorageScope.Assembly _
            Or IsolatedStorageScope.Domain, Nothing, Nothing)

        Dim isoStream As New IsolatedStorageFileStream("substituteUsername", System.IO.FileMode.Open, _
            System.IO.FileAccess.Read, System.IO.FileShare.Read)
        ' farThe code executes to this point only if a file corresponding to the username exists.
        ' Though you can perform operations on the stream, you cannot get a handle to the file.
        Try

            Dim aFileHandle As SafeFileHandle = isoStream.SafeFileHandle
            Console.WriteLine(("A pointer to a file handle has been obtained. " & aFileHandle.ToString() & " " & aFileHandle.GetHashCode()))

        Catch ex As Exception
            ' Handle the exception.
            Console.WriteLine("Expected exception")
            Console.WriteLine(ex.ToString())
        End Try

        Dim reader As New StreamReader(isoStream)
        ' Read the data.
        Me.NewsUrl = reader.ReadLine()
        Me.SportsUrl = reader.ReadLine()
        reader.Close()
        isoFile.Close()
        Return False
    Catch ex As System.IO.FileNotFoundException
        ' Expected exception if a file cannot be found. This indicates that we have a new user.
        Return True
    End Try
End Function 'GetPrefsForUser

Açıklamalar

Daha fazla bilgi için bkz. Handle.

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