FileOutputStream FileOutputStream FileOutputStream FileOutputStream Class


Writes data to a file.

public : sealed class FileOutputStream : IClosable, IOutputStream
public sealed class FileOutputStream : IDisposable, IOutputStream
Public NotInheritable Class FileOutputStream Implements IDisposable, IOutputStream
// This class does not provide a public constructor.
Windows 10 requirements
Device family
Windows 10 (introduced v10.0.10240.0)
API contract
Windows.Foundation.UniversalApiContract (introduced v1)


Close() Close() Close() Close()

Closes the current stream and releases system resources.

public : void Close()
This member is not implemented in C#
This member is not implemented in VB.Net
See Also

Dispose() Dispose() Dispose() Dispose()

Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

This member is not implemented in C++
void Dispose()
Sub Dispose
void Dispose()

FlushAsync() FlushAsync() FlushAsync() FlushAsync()

Flushes data asynchronously in a sequential stream.

public : IAsyncOperation<Platform::Boolean> FlushAsync()
public IAsyncOperation<bool> FlushAsync()
Public Function FlushAsync() As IAsyncOperation( Of bool )
Windows.Storage.Streams.FileOutputStream.flushAsync().done( /* Your success and error handlers */ );

The stream flush operation.


The FlushAsync method may produce latencies and does not always guarantee durable and coherent storage of data. It's generally recommended to avoid this method if possible.

WriteAsync(IBuffer) WriteAsync(IBuffer) WriteAsync(IBuffer) WriteAsync(IBuffer)

Writes data asynchronously to a file.

public : IAsyncOperationWithProgress<unsigned int, unsigned int> WriteAsync(IBuffer buffer)
public IAsyncOperationWithProgress<uint, uint> WriteAsync(IBuffer buffer)
Public Function WriteAsync(buffer As IBuffer) As IAsyncOperationWithProgress( Of uint )( Of uint )
Windows.Storage.Streams.FileOutputStream.writeAsync(buffer).done( /* Your success and error handlers */ );
IBuffer IBuffer IBuffer IBuffer

The buffer into which the asynchronous writer operation writes.


The byte writer operation.