/*
     * Sockets Class
     * (C)2009 Daniel Moss
     *
     * Handles all of the Socket functions
     * DO NOT REMOVE (C) NOTICE!
     *
     */

    internal class StateObject
    {
        public byte[] buffer = new byte[32768];
        public int BufferSize = 32767;
        public StringBuilder sb = new StringBuilder();
        public Socket workSocket;
    }

    internal class SocketsClass
    {
        #region Delegates

        public delegate void onConnectEventHandler();

        public delegate void onDataArrivalEventHandler(byte[] Data, int TotalBytes);

        public delegate void onDisconnectEventHandler();

        public delegate void onErrorEventHandler(string Description);

        public delegate void onSendCompleteEventHandler(int DataSize);

        #endregion

        private static Socket  client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
        private static IPHostEntry ipHostInfo = Dns.GetHostEntry("localhost");
        private static IPAddress ipAddress = ipHostInfo.AddressList[0];
        private static int port = 44;
       // private static string response;
        public event onConnectEventHandler onConnect;

        public event onErrorEventHandler onError;

        public event onDataArrivalEventHandler onDataArrival;

        public event onDisconnectEventHandler onDisconnect;

        public event onSendCompleteEventHandler onSendComplete;

        public void Connect(string RemoteHostName, int RemotePort)
        {
            try
            {
                client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                port = RemotePort;
                ipHostInfo = Dns.GetHostEntry(RemoteHostName);
                ipAddress = ipHostInfo.AddressList[0];
                var remoteEP = new IPEndPoint(ipAddress, port);
                client.BeginConnect(remoteEP, sockConnected, client);
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return;
            }
        }

        public void SendData(byte[] Data)
        {
            try
            {
                var byteData = Data;
                client.BeginSend(byteData, 0, byteData.Length, 0, sockSendEnd, client);
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return;
            }
        }

        public void Disconnect()
        {
            try
            {

                client.Shutdown(SocketShutdown.Both);
            }
            catch
            {
            }
            onDisconnect();
            client.Close();
        }

        public byte[] StringToBytes(string Data)
        {
            return Encoding.ASCII.GetBytes(Data);
        }

        public string BytestoString(byte[] Data)
        {
            return Encoding.ASCII.GetString(Data);
        }

        private void sockConnected(IAsyncResult ar)
        {
            try
            {
                if (client.Connected == false)
                {
                    if (onError != null)
                        onError("Connection refused.");
                    return;
                }
                var state = new StateObject();
                state.workSocket = client;
                client.BeginReceive(state.buffer, 0, state.BufferSize, 0, sockDataArrival, state);
                if (onConnect != null)
                    onConnect();
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return;
            }
        }

        private void sockDataArrival(IAsyncResult ar)
        {
            var state = (StateObject)ar.AsyncState;
            var client = state.workSocket;
            var bytesRead = 0;

            try
            {
                bytesRead = client.EndReceive(ar);
            }
            catch
            {
                return;
            }

            try
            {
                var Data = state.buffer;
                if (bytesRead == 0)
                {
                    client.Shutdown(SocketShutdown.Both);
                    client.Close();
                    if (onDisconnect != null)
                        onDisconnect();
                    return;
                }
                state.buffer = new byte[32768];

                client.BeginReceive(state.buffer, 0, state.BufferSize, 0, sockDataArrival, state);
                if (onDataArrival != null)
                    onDataArrival(Data, bytesRead);
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return;
            }
        }

        private void sockSendEnd(IAsyncResult ar)
        {
            try
            {
                var client = (Socket)ar.AsyncState;
                var bytesSent = client.EndSend(ar);
                if (onSendComplete != null)
                    onSendComplete(bytesSent);
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return;
            }
        }

        public bool Connected()
        {
            try
            {
                return client.Connected;
            }
            catch (Exception ex)
            {
                if (onError != null)

                    onError(ex.Message);
                return false;
            }
        }
    }

private SocketsClass pClient = new SocketsClass ();

You can then use event handlers such as:

pClient.onConnect += this.Client_onConnect;

pClient.onDataArrival += this.Client_onDataArrival;

pClient.onError += this.Client_onError;

pClient.onDisconnect += this.Client_onDisconnect;

pClient.onSendComplete +=this.Client_onSendComplete;

Hope this is useful to people

Took me ages to work this out

No tags Hide

Snippet of code to configure a web proxy

private static readonly IWebProxy sDefaultProxy = WebRequest.DefaultWebProxy;

public string ProxyUser = “”;
public string ProxyPassword = “”;
public bool ProxyUse = false;
public bool ProxyDefault = true;
public string ProxyAddress = “”;
public int ProxyPort = 80;

public static void ProxyConfig()

{

if (ProxyUse)

{

NetworkCredential credential = null;

if ((ProxyUser.Length > 0) ||

(ProxyPassword.Length > 0))

{

credential = new NetworkCredential();

credential.UserName = ProxyUser;

credential.Password = ProxyPassword;

}

if (!ProxyDefault)

{

var proxy = new WebProxy(ProxyAddress, .ProxyPort);

if (credential != null)

{

proxy.Credentials = credential;

}

WebRequest.DefaultWebProxy = proxy;

}

else if (credential != null)

{

WebRequest.DefaultWebProxy.Credentials = credential;

}

}

else

{

WebRequest.DefaultWebProxy = sDefaultProxy;

}

}

No tags Hide