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NetworkStream.WriteAsync Method

  • Reference

Definition

Namespace:
System.Net.Sockets
Assembly:
System.Net.Sockets.dll
Assembly:
netstandard.dll

Overloads

WriteAsync(ReadOnlyMemory<Byte>, CancellationToken)

Writes data to the NetworkStream from a read-only memory byte memory range as an asynchronous operation.
WriteAsync(Byte[], Int32, Int32, CancellationToken)

Writes data to the NetworkStream from the specified range of a byte array as an asynchronous operation.

WriteAsync(ReadOnlyMemory<Byte>, CancellationToken)

Source:
NetworkStream.cs
Source:
NetworkStream.cs
Source:
NetworkStream.cs

Writes data to the NetworkStream from a read-only memory byte memory range as an asynchronous operation.

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>

A region of memory that contains the data to write to the NetworkStream.

cancellationToken
CancellationToken

The token to monitor for cancellation requests.

Returns

ValueTask

A task that represents the asynchronous write operation.

Exceptions

InvalidOperationException

The NetworkStream does not support writing.

IOException

An error occurred when accessing the socket.

-or-

There was a failure while writing to the network.

ObjectDisposedException

The NetworkStream is closed.

OperationCanceledException

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

Remarks

This method sends all bytes in buffer to the network.

Note

Check to see if the NetworkStream is writable by calling the CanWrite property. If you attempt to write to a NetworkStream that is not writable, you will get an InvalidOperationException.

Note

If you receive an IOException, check the InnerException property to determine if it was caused by a SocketException. If so, use the ErrorCode property to obtain the specific error code and refer to the Windows Sockets version 2 API error code documentation for a detailed description of the error.

Applies to

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

Source:
NetworkStream.cs
Source:
NetworkStream.cs
Source:
NetworkStream.cs

Writes data to the NetworkStream from the specified range of a byte array as an asynchronous operation.

public:
 override System::Threading::Tasks::Task ^ WriteAsync(cli::array <System::Byte> ^ buffer, int offset, int size, 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[] buffer, int offset, int size, 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 (buffer As Byte(), offset As Integer, size 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

buffer
Byte[]

A byte array that contains the data to write to the NetworkStream.

offset
Int32

The location in buffer from which to start writing data.

sizecount
Int32

The number of bytes to write to the NetworkStream.

cancellationToken
CancellationToken

The token to monitor for cancellation requests.

Returns

Task

A task that represents the asynchronous write operation.

Exceptions

ArgumentNullException

The buffer parameter is null.

ArgumentOutOfRangeException

The offset parameter is less than 0.

-or-

The offset parameter is greater than the length of buffer.

-or-

The size parameter is less than 0.

-or-

The size parameter is greater than the length of buffer minus the value of the offset parameter.

InvalidOperationException

The NetworkStream does not support writing.

IOException

There was a failure while writing to the network.

-or-

An error occurred when accessing the socket.

ObjectDisposedException

The NetworkStream is closed.

OperationCanceledException

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

Remarks

This method starts at the specified offset and sends size bytes from the contents of buffer to the network.

Note

Check to see if the NetworkStream is writable by calling the CanWrite property. If you attempt to write to a NetworkStream that is not writable, you will get an InvalidOperationException.

Note

If you receive an IOException, check the InnerException property to determine if it was caused by a SocketException. If so, use the ErrorCode property to obtain the specific error code and refer to the Windows Sockets version 2 API error code documentation for a detailed description of the error.

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