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TCP/IP Chat Application Using C#

, 30 Jan 2006 CPOL
This is a LAN chat application with TCP/IP socket programming technology in C#. This application is a multi thread network application and works in a non-blocking way. Public and private chat is also implemented in this code.
demo.zip
Demo
ChatClient.exe
CommandClient.dll
CommandServer.dll
ConsoleServer.exe
P_0_0_0.U_0.dll
source.zip
CommandServer
CommandServer
bin
Debug
Properties
ConsoleServer
bin
Debug
obj
Debug
Refactor
ResolveAssemblyReference.cache
TempPE
Properties
CommandClient
ChatClient
bin
Debug
ChatClient.csproj.user
CSS
Graphics
arrow.gif
back.gif
face.gif
Icons
Enter.ico
Exit.ico
Private.ico
Save.ico
SendMessage.ico
Smiely.ico
Images
arrow.gif
Enter.png
Exit.png
face.gif
MNUBack.png
Private.png
Save.png
Smiely.png
Properties
Settings.settings
SoundResources
Door.wav
Knock.wav
Message.wav
Pow.wav
CommandClient
bin
Debug
obj
Debug
TempPE
Properties
P_0_0_0.U_0.dll
��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();

        }



    }

}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

ALLEXY
Software Developer (Senior)
Australia Australia
MCPD
MCTS: ASP.NET Applications
MCTS: ADO.NET Applications
MCTS: Windows Forms Applications
MCTS: Windows Communication Foundation Applications
MCPD: Enterprise Application Developer

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