How can I get a timeout exception in WCF using TcpClient Class

Question

I have a certain issue which I'm facing. My contract implementation (besides other stuff) has something like this:

try
            {

                response = _socketRequest.SendRequest(request, emmiterHeader);
                trCode = response.TraceCodeInt;
                if (trCode == 0)
                    statusRequest = (int) TSRequestAttemptStatus.active;
            }
            catch (TimeoutException tex)
            {
                throw;
            }
            catch (Exception)
            {
                statusRequest = (int) TSRequestAttemptStatus.notActive;
                throw;
            }
            finally
            {
                tsra = CreateTireaSincoRequestAttemptRow(DateTime.Now, statusRequest, emmiterHeader.HeaderId,
                                                         string.Empty,
                                                         string.Empty,
                                                         string.Empty,
                                                         previousContractNumber,
                                                         taxIdentificationCode,
                                                         policyHolderName,
                                                         policyHolderFirstName,
                                                         policyHolderLastName,
                                                         registrationNumberType.Substring(0, 1),
                                                         registrationNumber,
                                                         ((byte) ControlCodes.F),
                                                         DateTime.Now.AddDays(emmiterHeader.ValidityPeriod));
            }

Then in

_socketRequest.SendRequest(request, emmiterHeader);

Among other stuff is something like below:

using (var client = new TcpClient(header.SocketServerAddress,
                                      header.SocketServerPort == null ? 1 : (int)header.SocketServerPort))
                    {

                   Socket socket = client.Client;

                        // send data with timeout 10s
                        //socket.Send(arr);

                        Send(socket, arr, 0, arr.Length, 1000);

                        if (header.DebugMode)
                            _logger.LogInfo(InterfaceName, string.Format("Data Socket Send: {0} ", tempArr));
                        // receive data with timeout 10s
                        //Receive(client, arr);

                        len = Receive(socket, arrResponse, 0, arrResponse.Length, 5000, header.DebugMode, _logger);

                        if (socket.Connected)
                            socket.Close();

                        if (client.Connected)
                            client.Close();
                    }

The part under the using key word is never called because built in WCF Client is "hanging" on the TCPClient part, whcich in conclusion raises a SocketExeption error. I have set the timeouts in the web config to lets say 5 seconds. What I like to achieve is to throw not socket exception but the timeout exception. It looks like the SocketException is thrown but I can't make my wcf service throw a timeout exception. Is it possible to do that? I hope my questin is understandable what I want to do. If not I will try to explain as clearly as I can.

Answer 1

TcpClient does not know or care what you talk to. It has no notion of WCF, web services or the TimeoutException that you want.

All it does it maintain a TCP connection.

Catch the SocketException and analyze the error code stored in it. There is a code for timeouts. Throw TimeoutException yourself.

---

And get rid of this superstitious dispose stuff:

                    if (socket.Connected)
                        socket.Close();

                    if (client.Connected)
                        client.Close();

Once is enough.