BeginRead

Begins an asynchronous read operation.

 Public Function BeginRead(
	  Buffer ( ) As Byte,
	  ByVal Offset As Long,
	  ByVal Count As Long,
	  Optional ByVal Callback As AsyncCallback,
	  Optional State As Variant ) As IAsyncResult

Parameters

Buffer

[ByRef] Byte. The buffer to read the data into.

Offset

[ByVal] Long. The byte offset in buffer at which to begin writing data read from the stream.

Count

[ByVal] Long. The maximum number of bytes to read.

Callback

[ByVal] Optional. AsyncCallback. An optional asynchronous callback, to be called when the read is complete.

State

[ByRef] Optional. Variant. A user-provided object that distinguishes this particular asynchronous read request from other requests.

Return Values

Remarks

The default implementation of BeginRead on a stream calls the ReadBlock method synchronously.

Exceptions

Exception	Condition
ArgumentException	One or more of the arguments is invalid.
ObjectDisposedException	Methods were called after the stream was closed.
NotSupportedException	The current Stream implementation does not support the read operation.

See Also

Project CorLib Overview

Class MemoryMappedViewStream Overview