C# 网络编程 TcpListener

1.服务断代码

 public partial class Server : Form
    {

        private bool lk = true;

        public Server()
        {
            InitializeComponent();
            TextBox.CheckForIllegalCrossThreadCalls = false;
        }

        private void button1_Click(object sender, EventArgs e)
        {
            IPAddress ip = IPAddress.Parse(textBox1.Text);

            TcpListener server = new TcpListener(ip, int.Parse(textBox2.Text));
            server.Start();

            TaskFactory tasks = new TaskFactory();
            string ipaddress = string.Empty;
            TcpClient client = null;
            while (lk)
            {
                Console.WriteLine("等待连接。。。");
                client = server.AcceptTcpClient();

                tasks.StartNew(() => HandleClient(client, ipaddress)).Wait();
            }
        }

        private void HandleClient(TcpClient tcpclient, string ipadd)
        {

            lock (tcpclient)
            {
                if (tcpclient == null)
                {
                    return;
                }

                // Buffer for reading data
                Byte[] bytes = new Byte[];
                String data = null;

                // Enter the listening loop.
                while (tcpclient.Connected)
                {

                    data = null;

                    NetworkStream stream = tcpclient.GetStream();

                    int i;

                    if ((i = stream.Read(bytes, , bytes.Length)) != )
                    {
                        data = System.Text.Encoding.UTF8.GetString(bytes, , i);

                        byte[] msg = System.Text.Encoding.UTF8.GetBytes(data);

                        //stream.Write(msg, 0, msg.Length);
                        textBox3.AppendText(data);
                    }
                    tcpclient.Close();
                }
            }
        }

    }

2.客户端代码

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        TcpClient client = null;
        private void button1_Click(object sender, EventArgs e)
        {

            client = new TcpClient();
            try
            {
                //if (!client.Connected)
                //    client.Close();
                client.Connect(tbIP.Text, int.Parse(tbPort.Text));      // 与服务器连接
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
                return;
            }

            textBox2.Text = "连接成功";
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {
            button1_Click(null, null);

            string msg = textBox1.Text;
            if (msg != "")
            {
                NetworkStream streamToServer = client.GetStream();        //创建一个客户端的NetworkStream对象
                byte[] buffer = Encoding.UTF8.GetBytes(msg);     // 获得缓存

                streamToServer.Write(buffer, , buffer.Length);     // 发往服务器
                int numb = streamToServer.Read(buffer, , buffer.Length);     //接收来自服务器传回来的数据，保存到buffer数组(byte型)中去
                string s = Encoding.UTF8.GetString(buffer, , buffer.Length);   //将数组中的内容转化成string字符串，并且输出
                textBox2.AppendText(s + "\r\n");
            }
        }
    }