ソケット通信の一般的な方法

  tcp  ，        
        /// <summary>
        ///     tcp      
        /// </summary>
        /// <param name="ip">    ip</param>
        /// <param name="port">       </param>
        /// <returns></returns>
        public static Socket ConnectServer(string ip, int port)
        {
            Socket s = null;
            try
            {
                IPAddress ipAddress = IPAddress.Parse(ip);
                IPEndPoint ipEndPoint = new IPEndPoint(ipAddress, port);
                s = new Socket(ipEndPoint.AddressFamily, SocketType.Stream, ProtocolType.Tcp);
                s.Connect(ipEndPoint);
                if (s.Connected == false) s = null;
            }
            catch (Exception)
            {    
            }
            return s;
        }

        /// <summary>
        ///          
        /// </summary>
        /// <param name="socket">        socket</param>
        /// <param name="buffer">     </param>
        /// <param name="outTime">      ，    ( -1 ，              )</param>
        /// <returns>0:    ；-1:  ；-2:    ；-3:    </returns>
        public static int SendData(Socket socket, byte[] buffer, int outTime)
        {
            if (socket == null || socket.Connected == false)
            {
                throw new ArgumentException("  socket null，           ");
            }
            if (buffer == null || buffer.Length == 0)
            {
                throw new ArgumentException("  buffer null ,      0");
            }

            int flag = 0;
            try
            {
                int left = buffer.Length;
                int sndLen = 0;
                int hasSend = 0;

                while (true)
                {
                    if ((socket.Poll(outTime * 1000, SelectMode.SelectWrite) == true))
                    {   
                        //                 
                        sndLen = socket.Send(buffer, hasSend, left, SocketFlags.None);
                        left -= sndLen;
                        hasSend += sndLen;

                        //         
                        if (left == 0)
                        {                                        
                            flag = 0;
                            break;
                        }
                        else
                        {
                            //          
                            if (sndLen > 0)
                            {                                    
                                continue;
                            }
                            else //         
                            {                                                
                                flag = -2;
                                break;
                            }
                        }
                    }
                    else //     
                    {                                                        
                        flag = -1;
                        break;
                    }
                }
            }
            catch (SocketException)
            {
                //Log
                flag = -3;
            }
            return flag;
        }

     /// <summary>
        ///          
        /// </summary>
        /// <param name="socket">        socket</param>
        /// <param name="buffer">       </param>
        /// <param name="outTime">         ，    ( -1 ，              )</param>
        /// <returns>0:      ；-1:  ；-2:  ；-3:  </returns>
        public static int SendData(Socket socket, string buffer, int outTime)
        {
            if (buffer == null || buffer.Length == 0)
            {
                throw new ArgumentException("buffer null     0.");
            }
            return SendData(socket, System.Text.Encoding.Default.GetBytes(buffer), outTime);
        }

        /// <summary>
        ///            
        /// </summary>
        /// <param name="socket">                </param>
        /// <param name="buffer">        (          ，  buffer      )</param>
        /// <param name="outTime">         ，   (   -1 ，              )</param>
        /// <returns></returns>
        public static int RecvData(Socket socket, byte[] buffer, int outTime)
        {
            if (socket == null || socket.Connected == false)
            {
                throw new ArgumentException("socket null，           ");
            }
            if (buffer == null || buffer.Length == 0)
            {
                throw new ArgumentException("buffer null ,      0");
            }

            buffer.Initialize();
            int left = buffer.Length;
            int curRcv = 0;
            int hasRecv=0;
            int flag = 0;

            try
            {
                while (true)
                {
                    if (socket.Poll(outTime * 1000, SelectMode.SelectRead) == true)
                    {   
                        //          
                        curRcv = socket.Receive(buffer, hasRecv, left, SocketFlags.None);
                        left -= curRcv;
                        hasRecv += curRcv;

                        //          
                        if (left == 0)
                        {                                    
                            flag = 0;
                            break;
                        }
                        else
                        {
                            //         
                            if (curRcv > 0)
                            {                                
                                continue;
                            }
                            else  //     
                            {                                           
                                flag = -2;
                                break;
                            }
                        }
                    }
                    else //     
                    {                                                    
                        flag = -1;
                        break;
                    }
                }
            }
            catch (SocketException)
            {
                //Log
                flag = -3;
            }
            return flag;
        }