//form1
namespace SockProgram
{
    public partial class loginForm : Form
    {
        public Socket sock = new SockProgram.Socket();

        public loginForm()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            if (this.inputusername.Text.Length > 1 && this.inputpassword.Text.Length > 1)
            {
                sock.connect();
                sock.send("hello\r\n");
                sock.username = this.inputusername.Text;
                sock.password = this.inputpassword.Text;
            }

        }
    }
}

//Socket.cs
namespace SockProgram
{
    public class Socket
    {

        NetworkStream ns;
        System.Windows.Forms.Timer sockRead = new Timer();
        int connected = 0;

        string str_username;
        string str_password;
        int loggedin = 0;

        public string username
        {
            get { return str_username; }
            set { str_username = value; }
        }

        public string password
        {
            get { return str_password; }
            set { str_password = value; }
        }

        int isConnected
        {
            get { return connected; }
            set { connected = value; }
        }

        public Socket()
        {
            return;
        }
        public void connect()
        {
            TcpClient server;

            try
            {
                server = new TcpClient("servon.dk", 1000);
            }
            catch (SocketException)
            {
                MessageBox.Show("Kunne ikke connecte til server.");
                return;
            }
            ns = server.GetStream();
            connected = 1;
            Debug.WriteLine("Connected..");
            sockRead.Interval = 20;
            sockRead.Enabled = true;
            sockRead.Tick += new EventHandler(sockRead_Tick);
        }

        void sockRead_Tick(object sender, EventArgs e)
        {
            string stringData;
            int bytes;
            if (ns.DataAvailable)
            {
                byte[] data = new byte[1024];
                bytes = ns.Read(data, 0, data.Length);
                stringData = Encoding.ASCII.GetString(data, 0, bytes);
                Debug.WriteLine("<- " + stringData);
                handleInput(stringData);
            }
        }

        public void send(string text)
        {
            if (isConnected == 1)
            {
                ns.Write(Encoding.ASCII.GetBytes(text), 0, text.Length);
                ns.Flush();
                Debug.WriteLine("-> " + text);
            }
        }

        public void handleInput(string input)
        {
            string[] words = input.Split(' ');
            int code = System.Convert.ToInt32(words[0]);
            Debug.WriteLine("Code: " + code);
            switch (code)
            {
                case 1:
                    Debug.WriteLine("Handshake ok");
                    /* Do login */
                    send("USER " + username + "\n");
                    send("PASS " + password + "\n");
                    break;
                case 2:
                    MessageBox.Show("Du bruger en forkert version af programmet, update plz");
                    break;
                case 3:
                    MessageBox.Show("Brugernavn ikke fundet");
                    break;
                case 4:
                    MessageBox.Show("Forkert kode");
                    break;
                case 5:
                    loggedin = 1;
                    Form mainForm = new mainForm();
                    break;
            }
        }

    }
}