GZipStream.ReadAsync GZipStream.ReadAsync GZipStream.ReadAsync Method

Definition

Overloads

ReadAsync(Memory<Byte>, CancellationToken) ReadAsync(Memory<Byte>, CancellationToken)

Asynchronously reads a sequence of bytes from the current GZip stream into a byte memory region, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

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

Asynchronously reads a sequence of bytes from the current GZip stream into a byte array, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

ReadAsync(Memory<Byte>, CancellationToken) ReadAsync(Memory<Byte>, CancellationToken)

Asynchronously reads a sequence of bytes from the current GZip stream into a byte memory region, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

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 region of memory to write the data into.

cancellationToken
CancellationToken CancellationToken CancellationToken

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

Returns

A task that represents the asynchronous read operation, which wraps the total number of bytes read into the buffer. The result value can be less than the number of bytes allocated in the buffer if that many bytes are not currently available, or it can be 0 (zero) if the end of the GZip stream has been reached.

Remarks

The ReadAsync method enables you to perform resource-intensive I/O operations without blocking the main thread. This performance consideration is particularly important in a Windows 8.x Store app or desktop app where a time-consuming stream operation can block the UI thread and make your app appear as if it is not working. The async methods are used in conjunction with the async and await keywords in Visual Basic and C#.

Use the CanRead property to determine whether the current instance supports reading.

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

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

Asynchronously reads a sequence of bytes from the current GZip stream into a byte array, advances the position within the GZip stream by the number of bytes read, and monitors cancellation requests.

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

Parameters

array
Byte[]

The buffer to write the data into.

offset
Int32 Int32 Int32

The byte offset in array at which to begin writing data from the GZip stream.

count
Int32 Int32 Int32

The maximum number of bytes to read.

cancellationToken
CancellationToken CancellationToken CancellationToken

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

Returns

A task that represents the asynchronous read operation, which wraps the total number of bytes read into the array. The result value can be less than the number of bytes requested if the number of bytes currently available is less than the requested number, or it can be 0 (zero) if the end of the GZip stream has been reached.

Remarks

The ReadAsync method enables you to perform resource-intensive I/O operations without blocking the main thread. This performance consideration is particularly important in a Windows 8.x Store app or desktop app where a time-consuming stream operation can block the UI thread and make your app appear as if it is not working. The async methods are used in conjunction with the async and await keywords in Visual Basic and C#.

Use the CanRead property to determine whether the current instance supports reading.

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

Applies to