也说Socket

网上有大量socket相关文章，茫茫多，大多交代不清，最近自我整理了一下socket相关知识，附加了大量代码注释，先看效果。

上代码，客户端：

        Socket socket1 = null;//一个全局的socket对象

        private void btnConnect_Click(object sender, EventArgs e)
        {
            //获得服务器ip和端口号
            IPAddress ip = IPAddress.Parse(textBox1.Text);
            int port =Convert.ToInt32( textBox2.Text);

            //构造客户端socket，设置为tcp协议模式
            socket1 = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

            //连接
            socket1.Connect(ip,  port);
            if (socket1.Connected)//如果连接成功
            {
                textBox3.Text += "连接成功
";
                SendMsg(socket1, "发成功");

                string recMsg= "";
                //接收
                ReceiveMsg(socket1, ref recMsg);
                textBox3.Text +=recMsg;//文本显示
            }
            else
            {
                textBox3.Text += "连接不成功
";
            }
        }

        private void btnSendMessage_Click(object sender, EventArgs e)
        {
            if (socket1.Connected)
            {
                string sendMsg = textBox4.Text;

                //依据长度判断是否发送
                if (sendMsg.Length <= 0)
                {
                    return;
                }

                //拿到发送是否成功的标记
                bool isSendSuccess = SendMsg(socket1, textBox4.Text);

                string recMsg = "";
                bool isReceiveSuccess = ReceiveMsg(socket1, ref recMsg);
                textBox3.Text += recMsg;

                if (!(isSendSuccess&&isReceiveSuccess))
                {
                    textBox3.Text += "连接已断开，请重连";
                }
            }
        }

        /// <summary>
        /// 发送内容，并显示
        /// </summary>
        /// <param name="socket">发送内容的socket</param>
        /// <param name="msg">输入字符串</param>
        /// <returns>发送是否成功</returns>
        private bool SendMsg(Socket socket, string msg)
        {
            try {
                socket.Send(Encoding.UTF8.GetBytes(msg));
                return true;
            }
            catch (Exception e)
            {
                socket.Close();
                return false;
            }
        }

        /// <summary>
        /// 接收内容，并显示
        /// </summary>
        /// <param name="socket">接受内容的socket</param>
        /// <param name="msg">输出字符串</param>
        /// <returns>接收是否成功</returns>
        private static bool ReceiveMsg(Socket socket ,ref string  msg)
        {
            try
            {
                int recNumber;//接收到的字节数量
                byte[] recBytes = new byte[1024];//缓冲字节数组
                recNumber = socket.Receive(recBytes);//接收行为
                byte[] recBytesForShort = new byte[recNumber];//byteArrayForDestination
                Array.Copy(recBytes, recBytesForShort, recNumber);//拷贝

                //显示文本构造
                msg += (Encoding.UTF8.GetString(recBytesForShort) + "
");

                return true;
            }
            catch (Exception e)
            {
                socket.Close();

                return false;
            }

        }    

服务端：

        static void Main(string[] args)
        {
            //设置监听的ip和端口号
            IPAddress ip = IPAddress.Parse("192.168.120.56");
            IPEndPoint ipEP = new IPEndPoint(ip, 8088);

            //迎宾socket
            Socket serverSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            //绑定
            serverSocket.Bind(ipEP);
            //监听
            serverSocket.Listen(10);
            Console.WriteLine("监听已开
");

            while (true)
            {
                //这里会阻塞当前线程，以等待连接
                Socket socketTemp = serverSocket.Accept();

                //开启其他线程处理数据
                ParameterizedThreadStart pts = new ParameterizedThreadStart(ReceiveAndSend);//这里传入的方法必须是静态
                new Thread(pts).Start(socketTemp);
            }

        }

        /// <summary>
        /// socket循环读取和发送的方法，建议用于多线程异步处理
        /// </summary>
        /// <param name="socketTemp">单用户Socket对象</param>
        private static void ReceiveAndSend(object socketTemp)
        {
            Socket socket = (Socket)socketTemp;
            IPEndPoint ipep = ((IPEndPoint)(socket.RemoteEndPoint));
            string ip = ipep.Address.ToString();//获得对方ip
            string port = ipep.Port.ToString();//获得对方端口
            byte[] buffer = new byte[1024];

            while (true)//循环接收和发送
            {
                //接收并显示
                string result="";
                bool isReceiveMsgSuccess = ReceiveMsg(socket, ref result);
                if (isReceiveMsgSuccess)
                {
                    Console.WriteLine(DateTime.Now.ToLongDateString()+" "+ DateTime.Now.ToLongTimeString());
                    Console.WriteLine(ip + " _ " + port + "：" + result);
                }

                //回发
                string sendBackStr = "服务端已接收:" + result;
                SendMsg(socket, sendBackStr);

                //socket.Shutdown(SocketShutdown.Both);
                //socket.Close();
                //socket.Dispose();
            }
        }

        /// <summary>
        /// 接收内容（如果失败，会释放socket）
        /// </summary>
        /// <param name="socket">接受内容的socket</param>
        /// <param name="msg">输出字符串</param>
        /// <returns>接收是否成功</returns>
        private static bool ReceiveMsg(Socket socket,ref string msg)
        {
            try
            {
                int recNumber;//接收到的字节数量
                byte[] recBytes = new byte[1024];//缓冲字节数组
                recNumber = socket.Receive(recBytes);//接收行为
                byte[] recBytesForShort = new byte[recNumber];
                Array.Copy(recBytes, recBytesForShort, recNumber);//拷贝

                //显示
                msg += Encoding.UTF8.GetString(recBytesForShort) + "
";

                return true;
            }
            catch (Exception e)
            {
                socket.Close();

                return false;
            }

        }

        /// <summary>
        /// 发送内容（如果失败，会释放socket）
        /// </summary>
        /// <param name="socket">发送内容的socket</param>
        /// <param name="msg">输入字符串</param>
        /// <returns>接收是否成功</returns>
        private static bool SendMsg(Socket socket, string msg)
        {
            try
            {
                socket.Send(Encoding.UTF8.GetBytes(msg));
                return true;
            }
            catch (Exception e)
            {
                socket.Close();
                return false;
            }
        }    

需要源码请移步：客户端、服务端