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DeflateStream.WriteAsync Method

  • Reference

Definition

Namespace:
System.IO.Compression
Assembly:
System.IO.Compression.dll
Assembly:
netstandard.dll

Overloads

WriteAsync(ReadOnlyMemory<Byte>, CancellationToken)

Asynchronously writes compressed bytes to the underlying Deflate stream from the specified read-only memory region.
WriteAsync(Byte[], Int32, Int32, CancellationToken)

Asynchronously writes compressed bytes to the underlying Deflate stream from the specified byte array.

WriteAsync(ReadOnlyMemory<Byte>, CancellationToken)

Source:
DeflateStream.cs
Source:
DeflateStream.cs
Source:
DeflateStream.cs

Asynchronously writes compressed bytes to the underlying Deflate stream from the specified read-only memory region.

public override System.Threading.Tasks.ValueTask WriteAsync (ReadOnlyMemory<byte> buffer, System.Threading.CancellationToken cancellationToken = default);
override this.WriteAsync : ReadOnlyMemory<byte> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask
Public Overrides Function WriteAsync (buffer As ReadOnlyMemory(Of Byte), Optional cancellationToken As CancellationToken = Nothing) As ValueTask

Parameters

buffer
ReadOnlyMemory<Byte>

The region of memory to write data from.

cancellationToken
CancellationToken

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

Returns

ValueTask

A task that represents the asynchronous write operation.

Exceptions

OperationCanceledException

The cancellation token was canceled. This exception is stored into the returned task.

Remarks

The WriteAsync method enables you to perform resource-intensive I/O operations without blocking the main thread. This performance consideration is particularly important in desktop apps where a time-consuming stream operation can block the UI thread and make the app appear as if it's not working. The async methods are used in conjunction with the async and await keywords in Visual Basic and C#.

Use the CanWrite property to determine whether the current instance supports writing.

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

Applies to

WriteAsync(Byte[], Int32, Int32, CancellationToken)

Source:
DeflateStream.cs
Source:
DeflateStream.cs
Source:
DeflateStream.cs

Asynchronously writes compressed bytes to the underlying Deflate stream from the specified byte array.

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

Parameters

arraybuffer
Byte[]

The buffer that contains the data to compress.

offset
Int32

The zero-based byte offset from which to begin copying bytes to the Deflate stream.

count
Int32

The maximum number of bytes to write.

cancellationToken
CancellationToken

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

Returns

Task

A task that represents the asynchronous write operation.

Exceptions

OperationCanceledException

The cancellation token was canceled. This exception is stored into the returned task.

Remarks

The WriteAsync method enables you to perform resource-intensive I/O operations without blocking the main thread. This performance consideration is particularly important in desktop apps where a time-consuming stream operation can block the UI thread and make the app appear as if it's not working. The async methods are used in conjunction with the async and await keywords in Visual Basic and C#.

Use the CanWrite property to determine whether the current instance supports writing.

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

This method stores in the task it returns all non-usage exceptions that the method's synchronous counterpart can throw. If an exception is stored into the returned task, that exception will be thrown when the task is awaited. Usage exceptions, such as ArgumentException, are still thrown synchronously. For the stored exceptions, see the exceptions thrown by Write(Byte[], Int32, Int32).

Applies to