/*
 * Created by SharpDevelop.
 * User: Jayan Nair
 * Date: 7/9/2004
 * Time: 2:27 PM
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;


namespace DefaultNamespace
{
    /// <summary>
    /// Description of SocketClient.	
    /// </summary>
    public class SocketClient : System.Windows.Forms.Form
    {
        private System.Windows.Forms.Label label3;
        private System.Windows.Forms.Label label2;
        private System.Windows.Forms.Label label1;
        private System.Windows.Forms.Button buttonDisconnect;
        private System.Windows.Forms.TextBox textBoxIP;
        private System.Windows.Forms.Label label5;
        private System.Windows.Forms.Button buttonConnect;
        private System.Windows.Forms.TextBox textBoxPort;
        private System.Windows.Forms.RichTextBox richTextRxMessage;
        private System.Windows.Forms.Label label4;
        private System.Windows.Forms.TextBox textBoxConnectStatus;
        private System.Windows.Forms.RichTextBox richTextTxMessage;
        private System.Windows.Forms.Button buttonSendMessage;
        private System.Windows.Forms.Button buttonClose;

        byte[] m_dataBuffer = new byte[10];
        IAsyncResult m_result;
        public AsyncCallback m_pfnCallBack;
        private System.Windows.Forms.Button btnClear;
        public Socket m_clientSocket;

        public SocketClient()
        {
            //
            // The InitializeComponent() call is required for Windows Forms designer support.
            //
            InitializeComponent();

            textBoxIP.Text = GetIP();
        }

        [STAThread]
        public static void Main(string[] args)
        {
            Application.Run(new SocketClient());
        }

        #region Windows Forms Designer generated code
        /// <summary>
        /// This method is required for Windows Forms designer support.
        /// Do not change the method contents inside the source code editor. The Forms designer might
        /// not be able to load this method if it was changed manually.
        /// </summary>
        private void InitializeComponent()
        {
            this.buttonClose = new System.Windows.Forms.Button();
            this.buttonSendMessage = new System.Windows.Forms.Button();
            this.richTextTxMessage = new System.Windows.Forms.RichTextBox();
            this.textBoxConnectStatus = new System.Windows.Forms.TextBox();
            this.label4 = new System.Windows.Forms.Label();
            this.richTextRxMessage = new System.Windows.Forms.RichTextBox();
            this.textBoxPort = new System.Windows.Forms.TextBox();
            this.buttonConnect = new System.Windows.Forms.Button();
            this.label5 = new System.Windows.Forms.Label();
            this.textBoxIP = new System.Windows.Forms.TextBox();
            this.buttonDisconnect = new System.Windows.Forms.Button();
            this.label1 = new System.Windows.Forms.Label();
            this.label2 = new System.Windows.Forms.Label();
            this.label3 = new System.Windows.Forms.Label();
            this.btnClear = new System.Windows.Forms.Button();
            this.SuspendLayout();
            // 
            // buttonClose
            // 
            this.buttonClose.Location = new System.Drawing.Point(440, 216);
            this.buttonClose.Name = "buttonClose";
            this.buttonClose.Size = new System.Drawing.Size(64, 24);
            this.buttonClose.TabIndex = 11;
            this.buttonClose.Text = "Close";
            this.buttonClose.Click += new System.EventHandler(this.ButtonCloseClick);
            // 
            // buttonSendMessage
            // 
            this.buttonSendMessage.Location = new System.Drawing.Point(8, 184);
            this.buttonSendMessage.Name = "buttonSendMessage";
            this.buttonSendMessage.Size = new System.Drawing.Size(240, 24);
            this.buttonSendMessage.TabIndex = 14;
            this.buttonSendMessage.Text = "Send Message";
            this.buttonSendMessage.Click += new System.EventHandler(this.ButtonSendMessageClick);
            // 
            // richTextTxMessage
            // 
            this.richTextTxMessage.Location = new System.Drawing.Point(8, 80);
            this.richTextTxMessage.Name = "richTextTxMessage";
            this.richTextTxMessage.Size = new System.Drawing.Size(240, 96);
            this.richTextTxMessage.TabIndex = 2;
            this.richTextTxMessage.Text = "";
            // 
            // textBoxConnectStatus
            // 
            this.textBoxConnectStatus.BackColor = System.Drawing.SystemColors.Control;
            this.textBoxConnectStatus.BorderStyle = System.Windows.Forms.BorderStyle.None;
            this.textBoxConnectStatus.ForeColor = System.Drawing.SystemColors.HotTrack;
            this.textBoxConnectStatus.Location = new System.Drawing.Point(128, 224);
            this.textBoxConnectStatus.Name = "textBoxConnectStatus";
            this.textBoxConnectStatus.ReadOnly = true;
            this.textBoxConnectStatus.Size = new System.Drawing.Size(240, 13);
            this.textBoxConnectStatus.TabIndex = 10;
            this.textBoxConnectStatus.Text = "Not Connected";
            // 
            // label4
            // 
            this.label4.Location = new System.Drawing.Point(8, 64);
            this.label4.Name = "label4";
            this.label4.Size = new System.Drawing.Size(120, 16);
            this.label4.TabIndex = 9;
            this.label4.Text = "Message To Server";
            // 
            // richTextRxMessage
            // 
            this.richTextRxMessage.BackColor = System.Drawing.SystemColors.InactiveCaptionText;
            this.richTextRxMessage.Location = new System.Drawing.Point(256, 80);
            this.richTextRxMessage.Name = "richTextRxMessage";
            this.richTextRxMessage.ReadOnly = true;
            this.richTextRxMessage.Size = new System.Drawing.Size(248, 128);
            this.richTextRxMessage.TabIndex = 1;
            this.richTextRxMessage.Text = "";
            // 
            // textBoxPort
            // 
            this.textBoxPort.Location = new System.Drawing.Point(112, 31);
            this.textBoxPort.Name = "textBoxPort";
            this.textBoxPort.Size = new System.Drawing.Size(48, 20);
            this.textBoxPort.TabIndex = 6;
            this.textBoxPort.Text = "8000";
            // 
            // buttonConnect
            // 
            this.buttonConnect.BackColor = System.Drawing.SystemColors.HotTrack;
            this.buttonConnect.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.buttonConnect.ForeColor = System.Drawing.Color.Yellow;
            this.buttonConnect.Location = new System.Drawing.Point(344, 8);
            this.buttonConnect.Name = "buttonConnect";
            this.buttonConnect.Size = new System.Drawing.Size(72, 48);
            this.buttonConnect.TabIndex = 7;
            this.buttonConnect.Text = "Connect To Server";
            this.buttonConnect.Click += new System.EventHandler(this.ButtonConnectClick);
            // 
            // label5
            // 
            this.label5.Location = new System.Drawing.Point(0, 224);
            this.label5.Name = "label5";
            this.label5.Size = new System.Drawing.Size(104, 16);
            this.label5.TabIndex = 13;
            this.label5.Text = "Connection Status";
            // 
            // textBoxIP
            // 
            this.textBoxIP.Location = new System.Drawing.Point(112, 8);
            this.textBoxIP.Name = "textBoxIP";
            this.textBoxIP.Size = new System.Drawing.Size(152, 20);
            this.textBoxIP.TabIndex = 3;
            this.textBoxIP.Text = "";
            // 
            // buttonDisconnect
            // 
            this.buttonDisconnect.BackColor = System.Drawing.Color.Red;
            this.buttonDisconnect.Font = new System.Drawing.Font("Tahoma", 8.25F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((System.Byte)(0)));
            this.buttonDisconnect.ForeColor = System.Drawing.Color.Yellow;
            this.buttonDisconnect.Location = new System.Drawing.Point(432, 8);
            this.buttonDisconnect.Name = "buttonDisconnect";
            this.buttonDisconnect.Size = new System.Drawing.Size(72, 48);
            this.buttonDisconnect.TabIndex = 15;
            this.buttonDisconnect.Text = "Disconnet From Server";
            this.buttonDisconnect.Click += new System.EventHandler(this.ButtonDisconnectClick);
            // 
            // label1
            // 
            this.label1.Location = new System.Drawing.Point(8, 8);
            this.label1.Name = "label1";
            this.label1.Size = new System.Drawing.Size(96, 16);
            this.label1.TabIndex = 4;
            this.label1.Text = "Server IP Address";
            // 
            // label2
            // 
            this.label2.Location = new System.Drawing.Point(8, 33);
            this.label2.Name = "label2";
            this.label2.Size = new System.Drawing.Size(64, 16);
            this.label2.TabIndex = 5;
            this.label2.Text = "Server Port";
            // 
            // label3
            // 
            this.label3.Location = new System.Drawing.Point(256, 64);
            this.label3.Name = "label3";
            this.label3.Size = new System.Drawing.Size(192, 16);
            this.label3.TabIndex = 8;
            this.label3.Text = "Message From Server";
            // 
            // btnClear
            // 
            this.btnClear.Location = new System.Drawing.Point(376, 216);
            this.btnClear.Name = "btnClear";
            this.btnClear.Size = new System.Drawing.Size(64, 24);
            this.btnClear.TabIndex = 16;
            this.btnClear.Text = "Clear";
            this.btnClear.Click += new System.EventHandler(this.btnClear_Click);
            // 
            // SocketClient
            // 
            this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
            this.ClientSize = new System.Drawing.Size(512, 244);
            this.Controls.Add(this.btnClear);
            this.Controls.Add(this.buttonDisconnect);
            this.Controls.Add(this.buttonSendMessage);
            this.Controls.Add(this.label5);
            this.Controls.Add(this.buttonClose);
            this.Controls.Add(this.textBoxConnectStatus);
            this.Controls.Add(this.label4);
            this.Controls.Add(this.label3);
            this.Controls.Add(this.buttonConnect);
            this.Controls.Add(this.textBoxPort);
            this.Controls.Add(this.label2);
            this.Controls.Add(this.label1);
            this.Controls.Add(this.textBoxIP);
            this.Controls.Add(this.richTextTxMessage);
            this.Controls.Add(this.richTextRxMessage);
            this.Name = "SocketClient";
            this.Text = "Socket Client";
            this.ResumeLayout(false);

        }
        #endregion
        void ButtonCloseClick(object sender, System.EventArgs e)
        {
            if (m_clientSocket != null)
            {
                m_clientSocket.Close();
                m_clientSocket = null;
            }
            Close();
        }

        void ButtonConnectClick(object sender, System.EventArgs e)
        {
            // See if we have text on the IP and Port text fields
            if (textBoxIP.Text == "" || textBoxPort.Text == "")
            {
                MessageBox.Show("IP Address and Port Number are required to connect to the Server\n");
                return;
            }
            try
            {
                UpdateControls(false);
                // Create the socket instance
                m_clientSocket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);

                // Cet the remote IP address
                IPAddress ip = IPAddress.Parse(textBoxIP.Text);
                int iPortNo = System.Convert.ToInt16(textBoxPort.Text);
                // Create the end point 
                IPEndPoint ipEnd = new IPEndPoint(ip, iPortNo);
                // Connect to the remote host
                m_clientSocket.Connect(ipEnd);
                if (m_clientSocket.Connected)
                {

                    UpdateControls(true);
                    //Wait for data asynchronously 
                    WaitForData();
                }
            }
            catch (SocketException se)
            {
                string str;
                str = "\nConnection failed, is the server running?\n" + se.Message;
                MessageBox.Show(str);
                UpdateControls(false);
            }
        }
        void ButtonSendMessageClick(object sender, System.EventArgs e)
        {
            try
            {
                string msg = richTextTxMessage.Text;
                // New code to send strings
                NetworkStream networkStream = new NetworkStream(m_clientSocket);
                System.IO.StreamWriter streamWriter = new System.IO.StreamWriter(networkStream);
                streamWriter.WriteLine(msg);
                streamWriter.Flush();

                /* Use the following code to send bytes
                byte[] byData = System.Text.Encoding.ASCII.GetBytes(objData.ToString ());
                if(m_clientSocket != null){
                    m_clientSocket.Send (byData);
                }
                */
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }
        }
        public void WaitForData()
        {
            try
            {
                if (m_pfnCallBack == null)
                {
                    m_pfnCallBack = new AsyncCallback(OnDataReceived);
                }
                SocketPacket theSocPkt = new SocketPacket();
                theSocPkt.thisSocket = m_clientSocket;
                // Start listening to the data asynchronously
                m_result = m_clientSocket.BeginReceive(theSocPkt.dataBuffer,
                                                        0, theSocPkt.dataBuffer.Length,
                                                        SocketFlags.None,
                                                        m_pfnCallBack,
                                                        theSocPkt);
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }

        }
        public class SocketPacket
        {
            public System.Net.Sockets.Socket thisSocket;
            public byte[] dataBuffer = new byte[1024];
        }

        public void OnDataReceived(IAsyncResult asyn)
        {
            try
            {
                SocketPacket theSockId = (SocketPacket)asyn.AsyncState;
                int iRx = theSockId.thisSocket.EndReceive(asyn);
                char[] chars = new char[iRx + 1];
                System.Text.Decoder d = System.Text.Encoding.UTF8.GetDecoder();
                int charLen = d.GetChars(theSockId.dataBuffer, 0, iRx, chars, 0);
                System.String szData = new System.String(chars);
                richTextRxMessage.Text = richTextRxMessage.Text + szData;
                WaitForData();
            }
            catch (ObjectDisposedException)
            {
                System.Diagnostics.Debugger.Log(0, "1", "\nOnDataReceived: Socket has been closed\n");
            }
            catch (SocketException se)
            {
                MessageBox.Show(se.Message);
            }
        }
        private void UpdateControls(bool connected)
        {
            buttonConnect.Enabled = !connected;
            buttonDisconnect.Enabled = connected;
            string connectStatus = connected ? "Connected" : "Not Connected";
            textBoxConnectStatus.Text = connectStatus;
        }
        void ButtonDisconnectClick(object sender, System.EventArgs e)
        {
            if (m_clientSocket != null)
            {
                m_clientSocket.Close();
                m_clientSocket = null;
                UpdateControls(false);
            }
        }
        //----------------------------------------------------	
        // This is a helper function used (for convenience) to 
        // get the IP address of the local machine
        //----------------------------------------------------
        String GetIP()
        {
            String strHostName = Dns.GetHostName();

            // Find host by name
            IPHostEntry iphostentry = Dns.GetHostByName(strHostName);

            // Grab the first IP addresses
            String IPStr = "";
            foreach (IPAddress ipaddress in iphostentry.AddressList)
            {
                IPStr = ipaddress.ToString();
                return IPStr;
            }
            return IPStr;
        }

        private void btnClear_Click(object sender, System.EventArgs e)
        {
            richTextRxMessage.Clear();
        }
    }
}