socket测试远程地址能否连接并为连接设置超时

 public   class TestConnect
    {
        string hostIp = "";
        int port = 3314;
        public string recMsg = "";
        Socket socketC = null;
        private readonly ManualResetEvent TimeoutObject = new ManualResetEvent(false);
       public TestConnect(string hostIp, int port)
       {

           this.hostIp = hostIp;
           this.port = port;
       }
       public bool connect()
       {
           ///创建终结点（EndPoint）
           IPAddress ip = IPAddress.Parse(hostIp);//把ip地址字符串转换为IPAddress类型的实例
           IPEndPoint ipe = new IPEndPoint(ip, port);//用指定的端口和ip初始化IPEndPoint类的新实例
           ///创建socket
           socketC = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个socket对像，如果用udp协议，则要用SocketType.Dgram类型的套接字
           try
           {
               
             

               return Connect(ipe,3000);

           }

           catch (SocketException ex)
           {

               socketC.Close();
               socketC = null;
            
               return false;
           }

       }
       /// <summary>

       /// Socket连接请求

       /// </summary>

       /// <param name="remoteEndPoint">网络端点</param>

       /// <param name="timeoutMSec">超时时间</param>

       public bool Connect(IPEndPoint remoteEndPoint, int timeoutMSec)
       {

           TimeoutObject.Reset();

           socketC = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

           socketC.BeginConnect(remoteEndPoint, CallBackMethod, socketC);

           //阻塞当前线程

           if (TimeoutObject.WaitOne(timeoutMSec, false))
           {
              

               return true;

           }

           else
           {

               return false;

           }

       }

       //--异步回调方法

       private void CallBackMethod(IAsyncResult asyncresult)
       {

           //使阻塞的线程继续
           Socket socket = asyncresult.AsyncState as Socket;

           if (socket.Connected)
            {
                socket.EndConnect(asyncresult);
               
            }

           TimeoutObject.Set();

       }
       public void testOnline(string msg)
       {
              socketC.Send(Encoding.GetEncoding("gb2312").GetBytes(msg));

　　　　　　try

　　　　　　{
          //创建一个通信线程 
                ParameterizedThreadStart pts = new ParameterizedThreadStart(ServerRecMsg);
                Thread thr = new Thread(pts);
                thr.IsBackground = true;
                //启动线程
                thr.Start(socketC);
　　　　　　}

　　　　　　catch

　　　　　　{ throw ;}

　　　　}

　　
    
　　 /// <summary>
        /// 接收客户端发来的信息 
        /// </summary>
        /// <param name="socketClientPara">客户端套接字对象</param>
        private void ServerRecMsg(object socketClientPara)
        {
            Socket socketServer = socketClientPara as Socket;
            byte[] arrServerRecMsg = new byte[100];
            int len;
            while ((len = socketServer.Receive(arrServerRecMsg)) != 0)
            {

                //将机器接受到的字节数组转换为人可以读懂的字符串
                recMsg = Encoding.Default.GetString(arrServerRecMsg, 0, len);


                if (recMsg == "online")
                {
                    break;
                }
            }
           
        }

     
    }