TCP/IP Chat Application Using C#

��using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Drawing;

using System.Text;

using System.Windows.Forms;

using System.Net;

using Proshot.CommandClient;

using Proshot.UtilityLib.CommonDialogs;





namespace ChatClient

{

    

    public partial class frmMain : Form

    {

        private Proshot.CommandClient.CMDClient client;

        private System.Collections.Generic.List<frmPrivate> privateWindowsList;

        public frmMain()

        {

            InitializeComponent();

            this.privateWindowsList = new List<frmPrivate>();

            this.client = new Proshot.CommandClient.CMDClient(IPAddress.Parse("127.0.0.1") , 8000,"None");

        }

       

        protected override bool ProcessCmdKey(ref Message msg , Keys keyData)

        {

            if ( keyData == Keys.Enter )

                this.SendMessage();

            if ( this.txtMessages.Focused  && !ShareUtils.IsValidKeyForReadOnlyFields(keyData))

                return true;

            return base.ProcessCmdKey(ref msg , keyData);

        }

        private bool IsPrivateWindowOpened(string remoteName)

        {

            foreach ( frmPrivate privateWindow in this.privateWindowsList )

                if ( privateWindow.RemoteName == remoteName )

                    return true;

            return false;

        }

        private frmPrivate FindPrivateWindow(string remoteName)

        {

            foreach ( frmPrivate privateWindow in this.privateWindowsList )

                if ( privateWindow.RemoteName == remoteName )

                    return privateWindow;

            return null;

        }

        void client_CommandReceived(object sender , CommandEventArgs e)

        {

            switch(e.Command.CommandType)

            {

                case(CommandType.Message):

                    if ( e.Command.Target.Equals(IPAddress.Broadcast) )

                        this.txtMessages.Text += e.Command.SenderName + ": " + e.Command.MetaData + Environment.NewLine;

                    else if ( !this.IsPrivateWindowOpened(e.Command.SenderName) )

                    {

                        this.OpenPrivateWindow(e.Command.SenderIP , e.Command.SenderName , e.Command.MetaData);

                        ShareUtils.PlaySound(ShareUtils.SoundType.NewMessageWithPow);

                    }

                    break;



                case(CommandType.FreeCommand):

                    string [] newInfo = e.Command.MetaData.Split(new char [] { ':' });

                    this.AddToList(newInfo [0] , newInfo [1]);

                    ShareUtils.PlaySound(ShareUtils.SoundType.NewClientEntered);

                    break;

                case (CommandType.SendClientList ):

                    string [] clientInfo = e.Command.MetaData.Split(new char[]{':'});

                    this.AddToList(clientInfo [0] , clientInfo [1]);

                    break;

                case(CommandType.ClientLogOffInform):

                    this.RemoveFromList(e.Command.SenderName);

                    break;

            }

        }



        private void RemoveFromList(string name)

        {

            ListViewItem item = this.lstViwUsers.FindItemWithText(name);

            if ( item.Text != this.client.IP.ToString() )

            {

                this.lstViwUsers.Items.Remove(item);

                ShareUtils.PlaySound(ShareUtils.SoundType.ClientExit);

            }



            frmPrivate target = this.FindPrivateWindow(name);

            if ( target != null )

                target.Close();

        }

       

        private void mniEnter_Click(object sender , EventArgs e)

        {

            if ( this.mniEnter.Text == "Login" )

            {

                frmLogin dlg = new frmLogin(IPAddress.Parse("127.0.0.1") , 8000);

                dlg.ShowDialog();

                this.client = dlg.Client;

                

                if ( this.client.Connected )

                {

                    this.client.CommandReceived += new Proshot.CommandClient.CommandReceivedEventHandler(client_CommandReceived);

                    this.client.SendCommand(new Command(CommandType.FreeCommand , IPAddress.Broadcast , this.client.IP + ":" + this.client.NetworkName));

                    this.client.SendCommand(new Proshot.CommandClient.Command(Proshot.CommandClient.CommandType.SendClientList , this.client.ServerIP));

                    this.AddToList(this.client.IP.ToString() , this.client.NetworkName);

                    this.mniEnter.Text = "Log Off";

                }

            }

            else

            {

                this.mniEnter.Text = "Login";

                this.privateWindowsList.Clear();

                this.client.Disconnect();

                this.lstViwUsers.Items.Clear();

                this.txtNewMessage.Clear();

                this.txtNewMessage.Focus();

            }

        }





        private void mniExit_Click(object sender , EventArgs e)

        {

            this.Close();

        }



        private void btnSend_Click(object sender , EventArgs e)

        {

            this.SendMessage();

        }



        private void SendMessage()

        {

            if ( this.client.Connected && this.txtNewMessage.Text.Trim() != "" )

            {

                this.client.SendCommand(new Proshot.CommandClient.Command(Proshot.CommandClient.CommandType.Message , IPAddress.Broadcast , this.txtNewMessage.Text));

                this.txtMessages.Text += this.client.NetworkName + ": " + this.txtNewMessage.Text.Trim() + Environment.NewLine;

                this.txtNewMessage.Text = "";

                this.txtNewMessage.Focus();

            }

        }



        private void AddToList(string ip,string name)

        {

            ListViewItem newItem = this.lstViwUsers.Items.Add(ip);

            newItem.ImageKey = "Smiely.png";

            newItem.SubItems.Add(name);

        }



        private void OpenPrivateWindow(IPAddress remoteClientIP,string clientName)

        {

            if ( this.client.Connected )

            {

                if ( !this.IsPrivateWindowOpened(clientName) )

                {

                    frmPrivate privateWindow = new frmPrivate(this.client , remoteClientIP , clientName);

                    this.privateWindowsList.Add(privateWindow);

                    privateWindow.FormClosed += new FormClosedEventHandler(privateWindow_FormClosed);

                    privateWindow.StartPosition = FormStartPosition.CenterParent;

                    privateWindow.Show(this);

                }

            }

        }



        private void OpenPrivateWindow(IPAddress remoteClientIP , string clientName , string initialMessage)

        {

            if (this.client.Connected )

            {

                frmPrivate privateWindow = new frmPrivate(this.client , remoteClientIP , clientName , initialMessage);

                this.privateWindowsList.Add(privateWindow);

                privateWindow.FormClosed += new FormClosedEventHandler(privateWindow_FormClosed);

                privateWindow.Show(this);

            }

        }



        void privateWindow_FormClosed(object sender , FormClosedEventArgs e)

        {

            this.privateWindowsList.Remove((frmPrivate)sender);

        }



        private void btnPrivate_Click(object sender , EventArgs e)

        {

            this.StartPrivateChat();

        }



        private void StartPrivateChat()

        {

            if ( this.lstViwUsers.SelectedItems.Count != 0 )

                this.OpenPrivateWindow(IPAddress.Parse(this.lstViwUsers.SelectedItems [0].Text) , this.lstViwUsers.SelectedItems [0].SubItems [1].Text);

        }



        private void frmMain_FormClosing(object sender , FormClosingEventArgs e)

        {

            Proshot.LanguageManager.LanguageActions.ChangeLanguageToEnglish();

            this.client.Disconnect();

        }



        private void mniSave_Click(object sender , EventArgs e)

        {

            SaveFileDialog saveDlg = new SaveFileDialog();

            saveDlg.Filter = "HTML Files(*.HTML;*.HTM)|*.html;*.htm";

            saveDlg.FilterIndex = 0;

            saveDlg.RestoreDirectory = true;

            saveDlg.CheckPathExists = true;

            saveDlg.OverwritePrompt = true;

            saveDlg.FileName = this.Text;

            if ( saveDlg.ShowDialog() == DialogResult.OK )

                ShareUtils.SaveAsHTML(saveDlg.FileName , this.txtMessages.Lines , this.Text);

        }



        private void mniCopy_Click(object sender , EventArgs e)

        {

            this.txtNewMessage.Copy();

        }



        private void mniPaste_Click(object sender , EventArgs e)

        {

            this.txtNewMessage.Paste();

        }



        private void mniCopyText_Click(object sender , EventArgs e)

        {

            this.txtMessages.Copy();

        }



        private void mniPrivate_Click(object sender , EventArgs e)

        {

            this.StartPrivateChat();

        }



    }

}