#region 成员变量

        string _IP;
        int _port;
        byte[] recvBuf = null;
        string _receiveString;
        bool _hasReceive;
        UdpClient receiver = null;
        IPEndPoint senderEP = null;

        public string IP
        {
            get { return _IP; }
            set { _IP = value; }
        }
        public int port
        {
            get { return _port; }
            set { _port = value; }
        }
        public string receiveString
        {
            get
            {
                hasReceive = false;
                return _receiveString;
            }
            set
            {
                _receiveString = value;
            }
        }
        public bool hasReceive
        {
            get { return _hasReceive; }
            set { _hasReceive = value; }
        }

        #endregion 成员变量

        #region 构造函数

        public UdpReceiver(string IP,int port)
        {
            _IP = IP;
            _port = port;
            IPEndPoint localEP = new IPEndPoint(IPAddress.Parse(_IP), _port);
            receiver = new UdpClient(localEP);
            _hasReceive = false;
            senderEP = new IPEndPoint(IPAddress.Any, 0);
        }

        #endregion 构造函数

        #region 成员函数

        public void receive()
        {
            recvBuf = receiver.Receive(ref senderEP);
            _receiveString = Encoding.Default.GetString(recvBuf);
            _hasReceive = true;
        }

        public void close()
        {
            if (receiver != null)
                receiver.Close();
        }

        #endregion 成员函数

 System.Timers.Timer resetReceiverTimer;
        double resetInterval = 60 * 1;
        UdpReceiver receiver = null;
        private void ResetReceiver(object sender, System.Timers.ElapsedEventArgs e)
        {
            receiveThread.Abort();   //接收线程，重新初始化套接字之前先关闭线程
            receiver.close();
            receiver = new UdpReceiver(IP, 42000);
            receiveThread = new Thread(new ThreadStart(loopReceive));
            receiveThread.Start();
        }