updown/jellyfish/demo/ClassHelper/SyncSocket/SyncClient.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Sockets;
using System.Net;

namespace demo.ClassHelper.SyncSocket
{
    class SyncClient
    {
        private static bool IsConnectionSuccessful = false;
        private static Exception socketexception;
        private static System.Threading.ManualResetEvent TimeoutObject = new System.Threading.ManualResetEvent(false);

        public static IPEndPoint CreateIPEndPoint(string ip, int port)
        {
            IPAddress ipAddress = StringToIPAddress(ip);
            return new IPEndPoint(ipAddress, port);
        }

        public static IPAddress StringToIPAddress(string ip)
        {
            return IPAddress.Parse(ip);
        }

        public static Socket Connect(IPEndPoint remoteEndPoint, int timeoutMSec)
        {
            TimeoutObject.Reset();
            socketexception = null;

            Socket socketClient = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            socketClient.BeginConnect(remoteEndPoint, new AsyncCallback(CallBackMethod), socketClient);

            if (TimeoutObject.WaitOne(timeoutMSec, false))
            {
                if (IsConnectionSuccessful)
                    return socketClient;
                else
                    throw socketexception;
            }
            else
            {
                socketClient.Close();
                throw new TimeoutException("TimeOut Exception");
            }

        }
        private static void CallBackMethod(IAsyncResult asyncresult)
        {
            try
            {
                IsConnectionSuccessful = false;
                Socket socketClient = asyncresult.AsyncState as Socket;

                if (socketClient != null)
                {
                    socketClient.EndConnect(asyncresult);
                    IsConnectionSuccessful = true;
                }
            }
            catch (Exception ex)
            {
                IsConnectionSuccessful = false;
                socketexception = ex;
            }
            finally
            {
                TimeoutObject.Set();
            }
        }  
    }
}