NetworkStream.ReadAsync Method

Definition

Overloads

ReadAsync(Memory<Byte>, CancellationToken)

Reads data from the NetworkStream and stores it in a byte memory range as an asynchronous operation.

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

Reads data from the NetworkStream and stores it to a specified range of a byte array as an asynchronous operation.

ReadAsync(Memory<Byte>, CancellationToken)

Reads data from the NetworkStream and stores it in a byte memory range as an asynchronous operation.

public override System.Threading.Tasks.ValueTask<int> ReadAsync (Memory<byte> buffer, System.Threading.CancellationToken cancellationToken = null);
override this.ReadAsync : Memory<byte> * System.Threading.CancellationToken -> System.Threading.Tasks.ValueTask<int>

Parameters

buffer
Memory<Byte>

The buffer to write the data to.

cancellationToken
CancellationToken

The token to monitor for cancellation requests.

Returns

A ValueTask<TResult> that represents the asynchronous read operation. The value of its Result property contains the total number of bytes read into buffer.

Exceptions

The NetworkStream does not support reading.

System.IOException

An error occurred when accessing the socket.

-or-

There is a failure reading from the network.

Remarks

This method reads as much data as is available into buffer and returns the number of bytes successfully read.

Note

Check to see if the NetworkStream is readable by calling the CanRead property. If you attempt to read from a NetworkStream that is not readable, 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.

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

Reads data from the NetworkStream and stores it to a specified range of a byte array as an asynchronous operation.

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

Parameters

buffer
Byte[]

The buffer to write the data into.

offset
Int32

The location in buffer to begin storing the data to.

size
Int32

The number of bytes to read from the NetworkStream.

cancellationToken
CancellationToken

The token to monitor for cancellation requests.

Returns

A task that represents the asynchronous read operation. The value of its Result property contains the total number of bytes read into buffer.

Exceptions

The NetworkStream does not support reading.

System.IOException

An error occurred when accessing the socket.

-or-

There is a failure reading from the network.

Remarks

This method reads data into buffer and returns the number of bytes successfully read. The ReadAsync operation reads as much data as is available, up to the number of bytes specified by the size parameter.

Note

Check to see if the NetworkStream is readable by calling the CanRead property. If you attempt to read from a NetworkStream that is not readable, 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