Socket.EndAccept Method (IAsyncResult)
Asynchronously accepts an incoming connection attempt and creates a new Socket to handle remote host communication.
Assembly: System (in System.dll)
asyncResult is Nothing.
asyncResult was not created by a call to BeginAccept.
An error occurred when attempting to access the socket. See the Remarks section for more information.
The Socket has been closed.
EndAccept method was previously called.
Windows NT is required for this method.
EndAccept completes a call to BeginAccept. Before calling BeginAccept, you need to create a callback method that implements the AsyncCallback delegate. This callback method executes in a separate thread, and is called by the system after the BeginAccept method returns. It must accept the asyncResult parameter returned from the BeginAccept method.
Within the callback method, call the AsyncState method of the asyncResult parameter to obtain the Socket on which the connection attempt is being made. After obtaining the Socket, you can call the EndAccept method to successfully complete the connection attempt.
The EndAccept method blocks until a connection is pending in the incoming connection queue. The EndAccept method accepts the incoming connection and returns a new Socket that can be used to send data to and receive data from the remote host.
If you receive a SocketException, use the SocketException.ErrorCode property to obtain the specific error code. After you have obtained this code, refer to the Windows Sockets version 2 API error code documentation in the MSDN library for a detailed description of the error.
This member outputs trace information when you enable network tracing in your application. For more information, see Network Tracing in the .NET Framework.
The following code example ends an asynchronous request and creates a new Socket to accept an incoming connection request. For a complete example that demonstrates asynchronous communications with sockets, see Socket Code Examples.
Public Shared Sub Listen_Callback(ar As IAsyncResult) allDone.Set() Dim s As Socket = CType(ar.AsyncState, Socket) Dim s2 As Socket = s.EndAccept(ar) Dim so2 As New StateObject() so2.workSocket = s2 s2.BeginReceive(so2.buffer, 0, StateObject.BUFFER_SIZE, 0, New AsyncCallback(AddressOf Async_Send_Receive.Read_Callback), so2) End Sub 'Listen_Callback
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.