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\r\n";
                 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\r\n";
             }
         }

         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 <= )
                 {
                     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[];//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) + "\r\n");

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

                 return false;
             }

         }    

客户端

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, );

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

             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[];

             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[];//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) + "\r\n";

                 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;
             }
         }    

服务端

需要源码请移步：客户端、服务端