如何使服务器从多个客户端套接字接收图片

Question

so here is my server code that receive a picture from my client

public void Hey()
{
    Functions.ServerSend("Picture");
    if (Functions.serverrecievetext().CompareTo("Okay") == 0)
    {
        sck = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        LingerOption lo = new LingerOption(false, 0);
        sck.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Linger, lo);

        try
        {
            sck.Bind(Login.ip_ep);
            sck.Listen(100);
            Socket accepted = sck.Accept();
            byte[] buff = new byte[300000];

            MemoryStream m = new MemoryStream();

            read = accepted.Receive(buff, buff.Length, 0);
            m.Write(buff, 0, read);
            while (read > 0)
            {
                read = accepted.Receive(buff, buff.Length,0);
                if (read != 0)
                    m.Write(buff, 0, read);
            }

            Bitmap p = new Bitmap(m, false);
            m.Dispose();
            pictureBox1.Image = p;
            pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
            accepted.Close();

            sck.Dispose();
            sck.Close();
        }
        catch (Exception f)
        {

        }
    }
}



private void timer1_Tick(object sender, EventArgs e)
{
    Thread t = new Thread(Hey);
    t.Start();
}

it works just fine for one client and here is the client code :

private void timer1_Tick(object sender, EventArgs e)
{
    p = Functions.ClientRecieve();
    if (p.CompareTo("Picture") == 0)
    {
        Functions.ClientSendText("Okay");
        Bitmap b = new Bitmap(Screen.PrimaryScreen.Bounds.Width, Screen.PrimaryScreen.Bounds.Height);
        Graphics g = Graphics.FromImage(b as Image);
        g.CopyFromScreen(0, 0, 0, 0, b.Size);
        pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
        pictureBox1.Image = b;
        sck = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

        try
        {
            sck.Connect(Login.ip_ep);

            MemoryStream s = new MemoryStream();
            pictureBox1.Image.Save(s, System.Drawing.Imaging.ImageFormat.Png);

            sck.Send(s.ToArray());
            sck.Disconnect(true);
            sck.Dispose();
            sck.Close();
        }
        catch (Exception f)
        {

        }
    }
    else
    {
        Functions.ClientSendText("Okay");
        timer1.Stop();
        this.Close();
    }
}

I want the server to have the ability to receive different pictures from different clients at the same time (if that's even possible) note I open a new server when I click on button and it gives command to start new client too so when I click on the button two times I want to have two server forms each one is getting different pictures thanks in advance ^^

Answer 1

You want to receive different pictures from multiple clients at a same time. Then you'll need to learn using threads. The recipient server will listen for clients and start a new thread for each client where code to receive image will be written. Like this you can simultaneously receive or send data in parallel manner.

This will get you started with threads in c#