SqlFileStream.BeginRead(Byte[], Int32, Int32, AsyncCallback, Object) Method

Definition

Namespace:

System.Data.SqlTypes

Assembly:

System.Data.SqlClient.dll

Package:

System.Data.SqlClient v4.8.6

Begins an asynchronous read operation.

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

Parameters

buffer

Byte[]

The buffer to read the data into.

offset

Int32

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

count

Int32

The maximum number of bytes to read.

callback

AsyncCallback

An optional asynchronous callback, to be called when the read is complete.

state

Object

A user-provided object that distinguishes this particular asynchronous read request from other requests.

Returns

IAsyncResult

An IAsyncResult that represents the asynchronous read, which could still be pending.

Exceptions

NotSupportedException

Reading data is not supported on the stream.

Remarks

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

See also

• FILESTREAM Data