QuicStream.BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) 方法

定义

开始异步读操作。 (请考虑改用 ReadAsync(Byte[], Int32, Int32)。)

public:
 override IAsyncResult ^ BeginRead(cli::array <System::Byte> ^ buffer, int offset, int count, AsyncCallback ^ callback, System::Object ^ state);
public override IAsyncResult BeginRead (byte[] buffer, int offset, int count, AsyncCallback? callback, object? state);
override this.BeginRead : byte[] * int * int * AsyncCallback * obj -> IAsyncResult
Public Overrides Function BeginRead (buffer As Byte(), offset As Integer, count As Integer, callback As AsyncCallback, state As Object) As IAsyncResult

参数

buffer
Byte[]

数据读入的缓冲区。

offset
Int32

buffer 中的字节偏移量,从该偏移量开始写入从流中读取的数据。

count
Int32

最多读取的字节数。

callback
AsyncCallback

可选的异步回调,在完成读取时调用。

state
Object

一个用户提供的对象,它将该特定的异步读取请求与其他请求区别开来。

返回

表示异步读取的 IAsyncResult(可能仍处于挂起状态)。

适用于