CODEWITHSUNDEEP
c#multithreadingimagesocketstcp
Connor Huggett
Connor Huggett

Reputation: 65

tcp having trouble connecting c#

I'm having trouble getting my Sender thread to connect to my Receiver thread. Here's my code below (I'm a novice when it comes to socket programming so if you know a better of sending images over sockets please let me know):

Sender thread:

public void SendSS() 
    {            
        try
        {             

            while (!mainFrm.ssStop)
            {
               TcpClient ssTcpClient = new TcpClient();
                ssTcpClient.Connect(mainFrm.contactIP, 1500);                    
                if (ssTcpClient.Connected)
                {
                    Image screenShotBMP = GrabScreen();
                    NetworkStream ns = ssTcpClient.GetStream();
                    memStream = new MemoryStream();

                    screenShotBMP.Save(memStream, ImageFormat.Png);

                    byte[] bytesToSend = memStream.ToArray();                       ;
                    ns.Write(bytesToSend, 0, bytesToSend.Length);
                    ns.Flush();

                    screenShotBMP.Dispose();
                    ns.Close();
                    memStream.Close();
                    ssTcpClient.Close();
                }
            }
        }
        catch (Exception ex)
        {

            MessageBox.Show(ex.Message, "frmVoiceChat-SendSS()", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

Receiver thread:

public void ReceiveSS()
    {
        try
        {
            TcpListener ssTcpListener = new TcpListener(IPAddress.Any, 1500);
            while (!mainFrm.ssStop)
            {
                ssTcpListener.Start();
                TcpClient tcpReceiver = ssTcpListener.AcceptTcpClient();
                //TcpClient tcpReceiver = new TcpClient();
                ssTcpListener.AcceptTcpClient();
                //tcpReceiver.Connect(mainFrm.contactIP, 1500);
                if (tcpReceiver.Connected)
                {
                    labelText("Connected!!!");
                    //NetworkStream receivedNs = tcpReceiver.GetStream();
                    NetworkStream receivedNs = new NetworkStream(tcpReceiver.Client);
                    //ssTcpListener.Server.Receive();
                    //byte[] imageBytes = new byte[tcpReceiver.ReceiveBufferSize];
                    //receivedNs.Read(imageBytes, 0, imageBytes.Length);
                    //MemoryStream receivedMs = new MemoryStream(imageBytes);
                    //receivedNs.CopyTo(receivedMs);

                    //Image image = Image.FromStream(receivedNs); // ArgumentException: Parameter is not valid exception here.                        
                    pbScreenShare.Image = new Bitmap(receivedNs);

                    receivedNs.Close();
                    tcpReceiver.Close();
                    ssTcpListener.Stop();
                    //image.Dispose();
                    //receivedMs.Close();
                }                    
                else
                {
                    labelText("Not Connected!!!");
                }
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show(ex.Message, "frmVoiceChat-ReceiveSS()", MessageBoxButtons.OK, MessageBoxIcon.Error);
        }
    }

Upvotes: 0

Views: 69

Answers (1)

fejesjoco
fejesjoco

Reputation: 11903

You call AcceptTcpClient() twice. The second call will wait for a connection and block the rest of the code from executing. Please clean up your code.

Upvotes: 3

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