Hi,

I am using an AsyncCallback to receive a TcpClient on incoming
connections. The code below works fine until I start the application and
no connection is received within the time limit.
I could easily try / catch the code causing the problem but I would like
to understand why this problem is happening.
I was unable to find any field on the TcpListener that would indicate
the Listenign socket was stopped.


http://pastebin.com/882324 or

static private TcpClient _connectedClient;

static void AcceptClient(IAsyncResult ar)
{
TcpListener server = (TcpListener)ar.AsyncState;

_connectedClient = _listenSocket.EndAcceptTcpClient(ar);
}

static void Main()
{
TcpListener _listenSocket = new TcpListener(8005);
_listenSocket.Start();

_listenSocket.BeginAcceptTcpClient(new AsyncCallback(AcceptClient),
_listenSocket);

//Wait for 5 seconds for a connection
Thread.Sleep(5000);

if( _connectedClient == null )
{
//Failed to get a connection
//This call to stop invokes a call to AcceptClient
//This cause AcceptClient to crash on the EndAcceptTcpClient
_listenSocket.Stop();
}
else
{
//Application begins...
}
}



*** Sent via Developersdex http://www.developersdex.com ***

If you get SocketException it is because the socket is closed and the async
request is cancelled and it shows up as an exception at EndAcceptTcpClient.

"Steven Blair" <(E-Mail Removed)> ha scritto nel messaggio
news:(E-Mail Removed)...
> Hi,
>
> I am using an AsyncCallback to receive a TcpClient on incoming
> connections. The code below works fine until I start the application and
> no connection is received within the time limit.
> I could easily try / catch the code causing the problem but I would like
> to understand why this problem is happening.
> I was unable to find any field on the TcpListener that would indicate
> the Listenign socket was stopped.
>
>
> http://pastebin.com/882324 or
>
> static private TcpClient _connectedClient;
>
> static void AcceptClient(IAsyncResult ar)
> {
> TcpListener server = (TcpListener)ar.AsyncState;
>
> _connectedClient = _listenSocket.EndAcceptTcpClient(ar);
> }
>
> static void Main()
> {
> TcpListener _listenSocket = new TcpListener(8005);
> _listenSocket.Start();
>
> _listenSocket.BeginAcceptTcpClient(new AsyncCallback(AcceptClient),
> _listenSocket);
>
> //Wait for 5 seconds for a connection
> Thread.Sleep(5000);
>
> if( _connectedClient == null )
> {
> //Failed to get a connection
> //This call to stop invokes a call to AcceptClient
> //This cause AcceptClient to crash on the EndAcceptTcpClient
> _listenSocket.Stop();
> }
> else
> {
> //Application begins...
> }
> }
>
>
>
> *** Sent via Developersdex http://www.developersdex.com ***

Thanks for the reply.

Yeah, thats what I thought.
Any idea how I can check to see the Socket is closed?



*** Sent via Developersdex http://www.developersdex.com ***