CryptoStream.WriteAsync(Byte[], Int32, Int32, CancellationToken) CryptoStream.WriteAsync(Byte[], Int32, Int32, CancellationToken) CryptoStream.WriteAsync(Byte[], Int32, Int32, CancellationToken) Method

Definition

Writes a sequence of bytes to the current stream asynchronously, advances the current position within the stream by the number of bytes written, and monitors cancellation requests.

public:
 override System::Threading::Tasks::Task ^ WriteAsync(cli::array <System::Byte> ^ buffer, int offset, int count, System::Threading::CancellationToken cancellationToken);
public override System.Threading.Tasks.Task WriteAsync (byte[] buffer, int offset, int count, System.Threading.CancellationToken cancellationToken);
override this.WriteAsync : byte[] * int * int * System.Threading.CancellationToken -> System.Threading.Tasks.Task

Parameters

buffer
Byte[]

The buffer to write data from.

offset
Int32 Int32 Int32

The zero-based byte offset in buffer from which to begin writing bytes to the stream.

count
Int32 Int32 Int32

The maximum number of bytes to write.

cancellationToken
CancellationToken CancellationToken CancellationToken

The token to monitor for cancellation requests. The default value is None.

Returns

A task that represents the asynchronous write operation.

Exceptions

The sum of offset and count is larger than the buffer length.

The stream is currently in use by a previous write operation.

Remarks

You must preface your call to WriteAsync with the await (C#) or Await (Visual Basic) operator to suspend execution of the method until the task is complete. For more information, see Asynchronous Programming with Async and Await.

If the operation is canceled before it completes, the returned task contains the Canceled value for the Status property.

Applies to

See also