基於TCPIP的客戶機服務器程序

Server：

namespace MyTcpServer
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Socket newsock;
        Socket client;
        Thread thread;
        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                IPEndPoint ipep = new IPEndPoint(IPAddress.Any, 5555);
                newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                newsock.Bind(ipep);
                newsock.Listen(10);
                thread = new Thread(start);
                CheckForIllegalCrossThreadCalls = false;
                thread.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private void start(object obj)
        {
            try
            {
                client = newsock.Accept();
                textBox1.Text = "連接成功";
                IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint;
                byte[] data = new byte[1024];
                while (true)
                {
                    client.Receive(data);
                    textBox1.Text = textBox1.Text + "\r\n" + newclient.ToString() + Encoding.Unicode.GetString(data);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            string message = textBox2.Text;
            byte[] data = new byte[1024];
            data = Encoding.Unicode.GetBytes(message);
            if(client.Connected)
                client.Send(data);
        }
    }
}

Client：

namespace MyTCPClient
{
    public partial class Form1 : Form
    {
        Socket newsock;
        Thread thread;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            try
            {
                newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                IPAddress remoteIP = IPAddress.Parse("127.0.0.1");
                newsock.Connect(remoteIP, 5555);//阻塞
                textBox1.Text += "連接成功";
                thread = new Thread(start);
                CheckForIllegalCrossThreadCalls = false;
                thread.Start();
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private void start()
        {
            try
            {
                byte[] data = new byte[1024];
                while (true)
                {
                    newsock.Receive(data);
                    string message2 = Encoding.Unicode.GetString(data);
                    textBox1.Text += "\r\n" + newsock.RemoteEndPoint.ToString() + message2;
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            try
            {
                string message = textBox2.Text;
                byte[] data = new byte[1024];
                data = Encoding.Unicode.GetBytes(message);
                newsock.Send(data);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.ToString());
            }
        }
    }
}