C # multiplayer chat program

Using System;
Using System. Drawing;
Using System. Collections;
Using System. ComponentModel;
Using System. Windows. Forms;
Using System. Data;
Using System. Threading;
Using System. Net. Sockets;
Using System. Net;
Namespace Chat_Server
{
///
/// Summary of Form1.
///
Public class Form1: System. Windows. Forms. Form
{
///
/// Required designer variables.
///
Private System. ComponentModel. Container components = null;

 

Static int listenport = 6666;
Socket clientsocket;
Private System. Windows. Forms. ListBox lbClients;
ArrayList clients;
Private System. Windows. Forms. Button button1;
Thread clientservice;
Private System. Windows. Forms. Label label1;
Thread threadListen;

Public Form1 ()
{

InitializeComponent ();

}

///
/// Clear all resources in use.
///
Protected override void Dispose (bool disposing)
{
If (disposing)
{

If (clientservice! = Null)
{
Clientservice. Abort ();
}
If (threadListen! = Null)
{
Try
{
ThreadListen. Abort ();
}
Catch (Exception ex)
{
ThreadListen = null;
}
}

If (components! = Null)
{
Components. Dispose ();
}
}
Base. Dispose (disposing );

}

# Region code generated by Windows Form Designer
///
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
///
Private void InitializeComponent ()
{
This. lbClients = new System. Windows. Forms. ListBox ();
This. button1 = new System. Windows. Forms. Button ();
This. label1 = new System. Windows. Forms. Label ();
This. SuspendLayout ();
//
// LbClients
//
This. lbClients. ItemHeight = 12;
This. lbClients. Location = new System. Drawing. Point (16, 24 );
This. lbClients. Name = "lbClients ";
This. lbClients. Size = new System. Drawing. Size (184,268 );
This. lbClients. TabIndex = 0;
//
// Button1
//
This. button1.Location = new System. Drawing. Point (272, 56 );
This. button1.Name = "button1 ";
This. button1.TabIndex = 1;
This. button1.Text = "button1 ";
This. button1.Click + = new System. EventHandler (this. button#click );
//
// Label1
//
This. label1.Location = new System. Drawing. Point (240,136 );
This. label1.Name = "label1 ";
This. label1.Size = new System. Drawing. Size (120, 32 );
This. label1.TabIndex = 2;
This. label1.Text = "label1 ";
//
// Form1
//
This. AutoScaleBaseSize = new System. Drawing. Size (6, 14 );
This. ClientSize = new System. Drawing. Size (368,309 );
This. Controls. Add (this. label1 );
This. Controls. Add (this. button1 );
This. Controls. Add (this. lbClients );
This. Name = "Form1 ";
This. Text = "Form1 ";
This. Load + = new System. EventHandler (this. form#load );
This. ResumeLayout (false );

}
# Endregion

///
/// Main entry point of the application.
///
[STAThread]
Static void Main ()
{
Application. Run (new Form1 ());
}

Private void StartListening ()
{
TcpListener listener = new TcpListener (listenport );
Listener. Start ();
Label1.Text = "listening ....";
While (true)
{
Try
{

Socket s = listener. AcceptSocket ();
Clientsocket = s;
Clientservice = new Thread (new ThreadStart (ServiceClient ));
Clientservice. Start ();
}
Catch (Exception ex)
{
MessageBox. Show ("listening Error:" + ex. Message );
}
}
}
Private void ServiceClient ()
{
Socket client = clientsocket;
Bool keepalive = true;

While (keepalive)
{
Byte [] buffer = new Byte [1024];
Int bufLen = 0;
Try
{
BufLen = client. Available;

Client. Receive (buffer, 0, bufLen, SocketFlags. None );
If (bufLen = 0)
Continue;
}
Catch (Exception ex)
{
MessageBox. Show ("Receive Error:" + ex. Message );
Return;
}

String clientcommand = System. Text. Encoding. ASCII. GetString (buffer). Substring (0, bufLen );

String [] tokens = clientcommand. Split (new Char [] {'| '});
Console. WriteLine (clientcommand );

If (tokens [0] = "CONN ")
{
For (int n = 0; n {
Client cl = (Client) clients [n];
SendToClient (cl, "JOIN |" + tokens [1]);
}
EndPoint ep = client. RemoteEndPoint;
Client c = new Client (tokens [1], ep, clientservice, client );

String message = "LIST |" + GetChatterList () + "\ r \ n ";
SendToClient (c, message );

Clients. Add (c );

LbClients. Items. Add (c );

}
If (tokens [0] = "CHAT ")
{
For (int n = 0; n {
Client cl = (Client) clients [n];
SendToClient (cl, clientcommand );
}
}
If (tokens [0] = "PRIV ")
{
String destclient = tokens [3];
For (int n = 0; n {
Client cl = (Client) clients [n];
If (cl. Name. CompareTo (tokens [3]) = 0)
SendToClient (cl, clientcommand );
If (cl. Name. CompareTo (tokens [1]) = 0)
SendToClient (cl, clientcommand );
}
}
If (tokens [0] = "GONE ")
{
Int remove = 0;
Bool found = false;
Int c = clients. Count;
For (int n = 0; n {
Client cl = (Client) clients [n];
SendToClient (cl, clientcommand );
If (cl. Name. CompareTo (tokens [1]) = 0)
{
Remove = n;
Found = true;
LbClients. Items. Remove (cl );
}
}
If (found)
Clients. RemoveAt (remove );
Client. Close ();
Keepalive = false;
}
}
}

Private string GetChatterList ()
{
String result = "";

For (int I = 0; I {
Result + = (Client) clients [I]). Name + "| ";
}
Return result;

}

Private void SendToClient (Client cl, string clientCommand)
{
Byte [] message = System. Text. Encoding. ASCII. GetBytes (clientCommand );
Socket s = cl. Sock;
If (s. Connected)
{
S. Send (message, message. Length, 0 );
}
}

Private void Form1_Load (object sender, System. EventArgs e)
{
Clients = new ArrayList ();
}

Private void button#click (object sender, System. EventArgs e)
{
ThreadListen = new Thread (new ThreadStart (StartListening ));
ThreadListen. Start ();
}
}
}

 

 

******** ************/

/************************** Stored in the chatServer project *********/

Using System;
Using System. Threading;

Namespace Chat_Server
{
Using System. Net. Sockets;
Using System. Net;

///
/// Summary of the Client.
///
Public class Client
{
Private Thread clthread;
Private EndPoint endpoint;
Private string name;
Private Socket sock;

Public Client (string _ name, EndPoint _ endpoint, Thread _ thread, Socket _ sock)
{
// TODO: add the constructor logic here
Clthread = _ thread;
Endpoint = _ endpoint;
Name = _ name;
Sock = _ sock;
}

Public override string ToString ()
{
Return endpoint. ToString () + ":" + name;
}

Public Thread CLThread
{
Get {return clthread ;}
Set {clthread = value ;}
}

Public EndPoint Host
{
Get {return endpoint ;}
Set {endpoint = value ;}
}

Public string Name
{
Get {return name ;}
Set {name = value ;}
}

Public Socket Sock
{
Get {return sock ;}
Set {sock = value ;}
}
}
}

/***************************** ChatClient ********* ***************************/

Using System;
Using System. Drawing;
Using System. Collections;
Using System. ComponentModel;
Using System. Windows. Forms;
Using System. Data;

Using System. IO;
Using System. Net;
Using System. Net. Sockets;
Using System. Threading;

Namespace Chat_Client
{
///
/// Summary of Form1.
///
Public class Form1: System. Windows. Forms. Form
{
Private System. Windows. Forms. CheckBox checkBox1;
Private System. Windows. Forms. StatusBar statusBar1;

NetworkStream ns;
StreamReader sr;
TcpClient clientsocket;
Bool connected;
Thread receive;
String serveraddress = "219.228.231.85 ";
Int serverport = 6666;

Private System. Windows. Forms. RichTextBox rtbChatIn;
Private System. Windows. Forms. ListBox lbChatters;
Private System. Windows. Forms. TextBox ChatOut;
Private System. Windows. Forms. Button btnDisconnect;
Private System. Windows. Forms. Button btnSend;
Private System. Windows. Forms. TextBox clientName;

String clientname;
Private System. Windows. Forms. Button btnConnect;

Private System. ComponentModel. Container components = null;

Public Form1 ()
{

InitializeComponent ();

}

///
/// Clear all resources in use.
///
Protected override void Dispose (bool disposing)
{
If (disposing)
{
If (receive! = Null)
{
QuitChat ();
}
If (components! = Null)
{
Components. Dispose ();
}
}
Base. Dispose (disposing );
}

# Region code generated by Windows Form Designer
///
/// The designer supports the required methods-do not use the code editor to modify
/// Content of this method.
///
Private void InitializeComponent ()
{
This. lbChatters = new System. Windows. Forms. ListBox ();
This. rtbChatIn = new System. Windows. Forms. RichTextBox ();
This. checkBox1 = new System. Windows. Forms. CheckBox ();
This. ChatOut = new System. Windows. Forms. TextBox ();
This. btnSend = new System. Windows. Forms. Button ();
This. statusBar1 = new System. Windows. Forms. StatusBar ();
This. btnDisconnect = new System. Windows. Forms. Button ();
This. clientName = new System. Windows. Forms. TextBox ();
This. btnConnect = new System. Windows. Forms. Button ();
This. SuspendLayout ();
//
// LbChatters
//
This. lbChatters. ItemHeight = 12;
This. lbChatters. Location = new System. Drawing. Point (32, 40 );
This. lbChatters. Name = "lbChatters ";
This. lbChatters. Size = new System. Drawing. Size (112,172 );
This. lbChatters. TabIndex = 0;
//
// RtbChatIn
//
This. rtbChatIn. Location = new System. Drawing. Point (160, 40 );
This. rtbChatIn. Name = "rtbChatIn ";
This. rtbChatIn. Size = new System. Drawing. Size (208,176 );
This. rtbChatIn. TabIndex = 2;
This. rtbChatIn. Text = "";
//
// CheckBox1
//
This. checkBox1.Location = new System. Drawing. Point (16,248 );
This. checkBox1.Name = "checkBox1 ";
This. checkBox1.TabIndex = 3;
This. checkBox1.Text = "checkBox1 ";
//
// ChatOut
//
This. ChatOut. Location = new System. Drawing. Point (136,248 );
This. ChatOut. Name = "ChatOut ";
This. ChatOut. Size = new System. Drawing. Size (136, 21 );
This. ChatOut. TabIndex = 4;
This. ChatOut. Text = "message ";
//
// BtnSend
//
This. btnSend. Location = new System. Drawing. Point (336,248 );
This. btnSend. Name = "btnSend ";
This. btnSend. TabIndex = 5;
This. btnSend. Text = "send ";
This. btnSend. Click + = new System. EventHandler (this. btnSend_Click );
//
// StatusBar1
//
This. statusBar1.Location = new System. Drawing. Point (0,287 );
This. statusBar1.Name = "statusBar1 ";
This. statusBar1.Size = new System. Drawing. Size (464, 22 );
This. statusBar1.TabIndex = 6;
This. statusBar1.Text = "statusBar1 ";
//
// BtnDisconnect
//
This. btnDisconnect. Enabled = false;
This. btnDisconnect. Location = new System. Drawing. Point (392,112 );
This. btnDisconnect. Name = "btnDisconnect ";
This. btnDisconnect. Size = new System. Drawing. Size (64, 32 );
This. btnDisconnect. TabIndex = 7;
This. btnDisconnect. Text = "disconnected ";
This. btnDisconnect. Click + = new System. EventHandler (this. btnDisconnect_Click );
//
// ClientName
//
This. clientName. Location = new System. Drawing. Point (96, 8 );
This. clientName. Name = "clientName ";
This. clientName. TabIndex = 8;
This. clientName. Text = "name ";
//
// BtnConnect
//
This. btnConnect. Location = new System. Drawing. Point (392, 56 );
This. btnConnect. Name = "btnConnect ";
This. btnConnect. Size = new System. Drawing. Size (64, 32 );
This. btnConnect. TabIndex = 9;
This. btnConnect. Text = "Connect ";
This. btnConnect. Click + = new System. EventHandler (this. btnConnect_Click );
//
// Form1
//
This. AutoScaleBaseSize = new System. Drawing. Size (6, 14 );
This. ClientSize = new System. Drawing. Size (464,309 );
This. Controls. Add (this. btnConnect );
This. Controls. Add (this. clientName );
This. Controls. Add (this. btnDisconnect );
This. Controls. Add (this. statusBar1 );
This. Controls. Add (this. btnSend );
This. Controls. Add (this. ChatOut );
This. Controls. Add (this. checkBox1 );
This. Controls. Add (this. rtbChatIn );
This. Controls. Add (this. lbChatters );
This. Name = "Form1 ";
This. Text = "Form1 ";
This. ResumeLayout (false );

}
# Endregion

///
/// Main entry point of the application.
///
[STAThread]
Static void Main ()
{
Application. Run (new Form1 ());
}

Private void EstablishConnection ()
{
StatusBar1.Text = "connecting to server ";

Try
{
Clientsocket = new TcpClient (serveraddress, serverport );
Ns = clientsocket. GetStream ();
Sr = new StreamReader (ns );
Connected = true;

}
Catch (Exception)
{
MessageBox. Show ("cannot connect to the server! "," Error ",
MessageBoxButtons. OK, MessageBoxIcon. Exclamation );
StatusBar1.Text = "disconnected ";
}
}

Private void RegisterWithServer ()
{
LbChatters. Items. Clear ();

Clientname = clientName. Text;
Try
{
String command = "CONN |" + clientname; // + "\ r \ n ";
Byte [] outbytes = System. Text. Encoding. ASCII. GetBytes (command. ToCharArray ());
Ns. Write (outbytes, 0, outbytes. Length );

String serverresponse = sr. ReadLine ();
Serverresponse. Trim ();
String [] tokens = serverresponse. Split ('| ');
If (tokens [0] = "LIST ")
{
StatusBar1.Text = "connected ";
BtnDisconnect. Enabled = true;
}
If (tokens [1]! = "")
{
For (int n = 1; n lbChatters. Items. Add (tokens [n]. Trim (new char [] {'\ R',' \ n '}));
}
This. Text = clientname + ": connected to the server ";

}
Catch (Exception ex)
{
MessageBox. Show ("an error occurred during registration! "+ Ex. Message," error ",
MessageBoxButtons. OK, MessageBoxIcon. Exclamation );
Connected = false;
}
}

Private void ReceiveChat ()
{
Bool keepalive = true;
While (keepalive)
{
Try
{
Byte [] buffer = new Byte [1024]; // 2048 ???
Ns. Read (buffer, 0, buffer. Length );
String chatter = System. Text. Encoding. ASCII. GetString (buffer );
String [] tokens = chatter. Split (new Char [] {'| '});

If (tokens [0] = "CHAT ")
{
RtbChatIn. AppendText (tokens [1]);
// If (logging)
// Logwriter. WriteLine (tokens [1]);
}
If (tokens [0] = "PRIV ")
{
RtbChatIn. AppendText ("Private from ");
RtbChatIn. AppendText (tokens [1]. Trim ());
RtbChatIn. AppendText (tokens [2] + "\ r \ n ");
// If (logging)
//{
// Logwriter. Write ("Private from ");
// Logwriter. Write (tokens [1]. Trim ());
// Logwriter. WriteLine (tokens [2] + "\ r \ n ");
//}
}
If (tokens [0] = "JOIN ")
{
RtbChatIn. AppendText (tokens [1]. Trim ());
RtbChatIn. AppendText ("has joined the Chat \ r \ n ");
// If (logging)
//{
// Logwriter. WriteLine (tokens [1] + "has joined the Chat ");
//}
String newguy = tokens [1]. Trim (new char [] {'\ R',' \ n '});
LbChatters. Items. Add (newguy );
}
If (tokens [0] = "GONE ")
{
RtbChatIn. AppendText (tokens [1]. Trim ());
RtbChatIn. AppendText ("has left the Chat \ r \ n ");
// If (logging)
//{
// Logwriter. WriteLine (tokens [1] + "has left the Chat ");
//}
LbChatters. Items. Remove (tokens [1]. Trim (new char [] {'\ R',' \ n '}));
}
If (tokens [0] = "QUIT ")
{
Ns. Close ();
Clientsocket. Close ();
Keepalive = false;
StatusBar1.Text = "the server has stopped ";
Connected = false;
BtnSend. Enabled = false;
BtnDisconnect. Enabled = false;
}
}
Catch (Exception ){}
}
}

Private void QuitChat ()
{
If (connected)
{
Try
{
String command = "GONE |" + clientname;
Byte [] outbytes = System. Text. Encoding. ASCII. GetBytes (command. ToCharArray ());
Ns. Write (outbytes, 0, outbytes. Length );
Clientsocket. Close ();
}
Catch (Exception ex)
{
MessageBox. Show (ex. Message );
}
}
// If (logging)
// Logwriter. Close ();
If (receive! = Null & receive. IsAlive)
Receive. Abort ();
This. Text = "client ";

Connected = false;

}

Private void btnSend_Click (object sender, System. EventArgs e)
{
If (connected)
{
Try
{
String command = "CHAT |" + clientname + ":" + ChatOut. Text + "\ r \ n ";
Byte [] outbytes = System. Text. Encoding. ASCII. GetBytes (command. ToCharArray ());
Ns. Write (outbytes, 0, outbytes. Length );
// Clientsocket. Close ();
}
Catch (Exception ex)
{
MessageBox. Show (ex. Message );
}
}
}

Private void btnConnect_Click (object sender, System. EventArgs e)
{
EstablishConnection ();
RegisterWithServer ();
If (connected)
{
Receive = new Thread (new ThreadStart (ReceiveChat ));
Receive. Start ();
}
}

Private void btnDisconnect_Click (object sender, System. EventArgs e)
{
QuitChat ();
}
}
}