The Main Heart of the program is taken from the sample program of Gopalan Suresh Raj modified as per requirement & presented in front of you.... Hope it would be helpful for somebody
How to Run the Chat Server and the Client?
- First start the server.exe
- Next start formclient.exe
- Give you nick name "xyz" & click the connect button .... you will be connected to the server & a message will be displaed in the yellow box
- Run formclient.exe again with start-->run-->formclient.exe & give another
nick name for trial & error.
![chat_sImg2.jpg]()
The Server Code: The server code is implemented in newServer.cs.
/**
* Article: Channels and .NET Remoting
* Copyright (c) 2000, Gopalan Suresh Raj. All Rights Reserved.
* File: NewServer.cs
* ... Thanks Saurabh for great help to make it lively Your Knowledge Rules ....
* ... Thanks Mahesh for Loading it on Site .... It Rocks
* ... Thanks to You for Reading it You know better who you are :)
* ... The Main Heart of the program is taken from the sample program of Gopalan Suresh Raj
* ... modified as per requirement & presented in front of you.... Hope it would be helpful for somebody
*/
using System;
using System.IO;
using System.Collections;
using System.Runtime.Remoting;
using System.WinForms ;
using System.Runtime.Remoting.Channels.HTTP;
namespace com.icommware.PublishSubscribe
{
public class Topic : MarshalByRefObject
{
ArrayList userlist = new ArrayList() ;
ArrayList textboxlist = new ArrayList() ;
ArrayList listboxlist = new ArrayList() ;
///<summary>
/// Input : string username (by value) and RichTextBox , ListBox (by refrence)
/// Output: bool 'true' if username is unique else 'false '
///</summary>
public bool addUser(string user, ref RichTextBox textBox1, ref ListBox listBox1)
{
//check is username is present in the userlist 'ArrayList'
bool test=userlist.Contains(user) ;
if(test)
{
//if present then Give the message to use and return 'false'
textBox1.Text+="This Nick has already been taken, try changing your Nick \n" ;
return false ;
}
else
{
//user is unique hence add him to the userlist
userlist.Add(user) ;
//add the RichTextBox reference to textboxlist
textboxlist.Add(textBox1);
//add to existing users list
foreach(ListBox lb in listboxlist)
{
lb.Items.Add(user) ;
}
//add the ListBox reference to listboxlist
listboxlist.Add(listBox1) ;
//Send to message only to the client connected
textBox1.Text+="Connected to server... \n" ;
//send message to everyone .
sendMessage(user+" has Joined Chat") ;
//add all the usernames in the ListBox of the client
foreach(string users in userlist)
{
listBox1.Items.Add(users) ;
}
return true ;
}
}
///<summary>
/// Input: string username
/// It is called when the user quits chat
///</summary>
public void removeUser(string user)
{
//check is the user is present in the userlist
try
{
if(userlist.Contains(user))
{
//get the position of user in userlist
int i=userlist.IndexOf(user) ;
//remove user from userlist
userlist.Remove(user) ;
//remove user's RichTextBox reference from textboxarray
textboxlist.RemoveAt(i) ;
//remove user's ListBox refrence from listboxarray
listboxlist.RemoveAt(i) ;
//Inform all users about user quiting
sendMessage(user+" has quit Chat") ;
//remove the user from all users ListBox
foreach(ListBox lb in listboxlist)
{
lb.Items.Remove((object)user) ;
}
}
}
catch(Exception ed)
{
Console.WriteLine(ed) ;
}
}
///<summary>
/// Input: string message
/// it sends the message to all users connected to the server
///<summary>
public void sendMessage(string message)
{
//write the message on the server console
Console.WriteLine ("Added Message : {0}", message);
//for each user connected, send the message to them
foreach(RichTextBox rf in textboxlist)
{
rf.Text+=message+"\n" ;
}
}
}
public class TheServer
{
public static void Main ()
{
int listeningChannel = 1099;
// Create a New HTTP Channel that listens on Port listeningChannel
// TCPChannel channel = new TCPChannel (listeningChannel);
HTTPChannel channel = new HTTPChannel (listeningChannel);
// Register the channel with the runtime
ChannelServices.RegisterChannel (channel);
// Expose the Calculator Object from this Server
RemotingServices.RegisterWellKnownType ("Server",
"com.icommware.PublishSubscribe.Topic",
"Topic.soap",
WellKnownObjectMode.Singleton);
// Keep the Server running until the user presses enter
Console.WriteLine ("The Topic Server is up and running on port {0}", listeningChannel);
Console.WriteLine ("Press enter to stop the server...");
Console.ReadLine ();
}
}
}
// That's all ... it's all easy if you are willing understand !
// Make a printout of it & open your .net sdk for better understanding :)
The Client Code: The client code reside in newFormclient.cs.
/**
* Article: Channels and .NET Remoting
* Copyright (c) 2000, Gopalan Suresh Raj. All Rights Reserved.
* ... Thanks Saurabh for great help to make it lively .... thanks :)
* ... Thanks Mahesh for Loading it on Site .... It Rocks :)
* ... Thanks to You for Reading it You know better who you are :)
* ... The Main Heart of the program is taken from the sample program of Gopalan Suresh Raj
* ... modified as per requirement & presented in front of you.... Hope it would be helpful for somebody
*/
// Win32Form1.cs
namespace Win32Form1Namespace
{
using System;
using System.Drawing;
using System.ComponentModel;
using System.WinForms;
using System.Runtime.Remoting;
using System.Runtime.Remoting.Channels.HTTP;
using com.icommware.PublishSubscribe;
using System.Collections;
/// <summary>
/// Summary description for Win32Form1.
/// </summary>
public class Win32Form1 : System.WinForms.Form
{
/// <summary>
/// Required by the Win Forms designer
/// </summary>
private System.ComponentModel.Container components;
private System.WinForms.Button nickname_btn;
private System.WinForms.TextBox nickname_txtbox;
private System.WinForms.Label nickname;
private System.WinForms.Button btnListname;
private System.WinForms.Button button1;
private System.WinForms.TextBox textBox2;
private System.WinForms.Label label1;
private System.WinForms.GroupBox groupBox1;
//useing RichTextBox insted of TextBox since It supports many more enhancements private System.WinForms.RichTextBox textBox1;
private System.WinForms.ListBox listBox1;
private Topic topic ;
private string username ;
private bool connected=false ;
private HTTPChannel channel ;
public Win32Form1()
{
// Required for Win Form Designer support
InitializeComponent();
// TODO: Add any constructor code after InitializeComponent call
}
/// <summary>
/// Clean up any resources being used
/// </summary>
public override void Dispose()
{
quitclient() ;
base.Dispose();
components.Dispose();
}
/// <summary>
/// The main entry point for the application.
/// </summary>
public static void Main(string[] args)
{
Application.Run(new Win32Form1());
}
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with an editor
/// </summary>
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.button1 = new System.WinForms.Button();
this.listBox1 = new System.WinForms.ListBox();
this.groupBox1 = new System.WinForms.GroupBox();
this.label1 = new System.WinForms.Label();
this.nickname_btn = new System.WinForms.Button();
this.textBox2 = new System.WinForms.TextBox();
this.nickname = new System.WinForms.Label();
this.nickname_txtbox = new System.WinForms.TextBox();
this.btnListname = new System.WinForms.Button();
this.textBox1 = new System.WinForms.RichTextBox();
//@design this.TrayHeight = 0;
//@design this.TrayLargeIcon = false;
//@design this.TrayAutoArrange = true;
button1.Location = new System.Drawing.Point(136, 64);
button1.Size = new System.Drawing.Size(72, 24);
button1.TabIndex = 4;
button1.Text = "Send";
button1.Click += new System.EventHandler(button1_Click);
listBox1.Location = new System.Drawing.Point(320, 0);
listBox1.Size = new System.Drawing.Size(152, 329);
listBox1.TabIndex = 0;
groupBox1.Location = new System.Drawing.Point(16, 232);
groupBox1.TabIndex = 0;
groupBox1.TabStop = false;
groupBox1.Text = "Add Message";
groupBox1.Size = new System.Drawing.Size(240, 104);
label1.Location = new System.Drawing.Point(16, 32);
label1.Text = "Message";
label1.Size = new System.Drawing.Size(56, 23);
label1.TabIndex = 0;
nickname_btn.Location = new System.Drawing.Point(16, 392);
nickname_btn.Size = new System.Drawing.Size(224, 24);
nickname_btn.TabIndex = 2;
nickname_btn.Text = "Connect";
nickname_btn.Click += new System.EventHandler(nickname_btn_Click);
textBox2.Location = new System.Drawing.Point(72, 32);
textBox2.TabIndex = 3;
textBox2.Size = new System.Drawing.Size(160, 20);
textBox2.Click += new System.EventHandler(button1_Click);
nickname.Location = new System.Drawing.Point(16, 360);
nickname.Text = "Nick Name";
nickname.Size = new System.Drawing.Size(72, 16);
nickname.TabIndex = 0;
nickname_txtbox.Location = new System.Drawing.Point(88, 360);
nickname_txtbox.TabIndex = 1;
nickname_txtbox.Size = new System.Drawing.Size(152, 20);
nickname_txtbox.Click += new System.EventHandler(nickname_btn_Click);
btnListname.Location = new System.Drawing.Point(344, 336);
btnListname.Size = new System.Drawing.Size(96, 32);
btnListname.TabIndex = 5;
btnListname.Text = "Disconnect";
btnListname.Enabled=false ;
btnListname.Click += new System.EventHandler(btnListname_Click);
textBox1.Location = new System.Drawing.Point(24, 8);
textBox1.Multiline = true;
textBox1.TabIndex = 0;
textBox1.Size = new System.Drawing.Size(288, 208);
textBox1.BackColor = System.Drawing.SystemColors.Info;
this.Text = "Client";
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(496, 425);
groupBox1.Controls.Add(button1);
groupBox1.Controls.Add(textBox2);
groupBox1.Controls.Add(label1);
this.Controls.Add(nickname_btn);
this.Controls.Add(nickname_txtbox);
this.Controls.Add(nickname);
this.Controls.Add(btnListname);
this.Controls.Add(groupBox1);
this.Controls.Add(textBox1);
this.Controls.Add(listBox1);
}
///<summary>
/// Does the cleaning up when client diconnects
///</summary>
private void quitclient()
{
if(topic!=null)
{
try
{
//remove the user from the server
topic.removeUser(username) ;
connected=false ;
//set the buttons
btnListname.Enabled=false;
nickname_txtbox.Enabled=true ;
nickname_btn.Enabled=true ;
listBox1.Items.Clear() ;
//unregister to channel so we can connect some other place
ChannelServices.UnregisterChannel(channel) ;
}
catch(Exception ed)
{
//this exception will occur when a 2 clients are running on the same machine and
//one try's to disconnect.
//Since both are using the same port (i.e. '0') to conect to server
//if you see above we are calling 'ChannelServices.UnregisterChannel(channel)'
//this will try to close the port '0' but since another client is
//using this port a exception will occur
Console.WriteLine(ed) ;
}
}
}
protected void nickname_btn_Click(object sender, System.EventArgs e)
{
try
{
// codeing manipulation starts here ...
if(!connected)
{
int listeningChannel = 0;
// Create and register a channel to communicate to the server
// The Client will use the port passed in as args to listen for callbacks
channel = new HTTPChannel (listeningChannel);
ChannelServices.RegisterChannel (channel);
// Create an instance on the remote server and call a method remotely
topic = (Topic) Activator.GetObject (typeof (Topic), // type to create
"http://localhost:1099/Topic.soap" // URI
);
username = nickname_txtbox.Text ;
//add the user to the server
bool check = topic.addUser(nickname_txtbox.Text, ref textBox1 ,ref listBox1) ;
if(!check)
{
//if server rejected user then do cleanup
connected=false ;
btnListname.Enabled=false;
nickname_txtbox.Enabled=true ;
nickname_btn.Enabled=true ;
ChannelServices.UnregisterChannel (channel);
topic=null ;
nickname_txtbox.Text="" ;
}
else
{
//set up variables and buttons
connected=true ;
btnListname.Enabled=true;
nickname_txtbox.Enabled=false ;
nickname_btn.Enabled=false ;
this.Text="Client "+username+" Connected" ;
}
}
}
catch(Exception ed)
{
MessageBox.Show(this, "Exception occured"+ed.ToString());
}
}
protected void btnListname_Click(object sender, System.EventArgs e)
{
//call the mothod to quit rom server
quitclient() ;
}
protected void button1_Click(object sender, System.EventArgs e)
{
//send the message to everyone
if(textBox2.Text!="")
{
topic.sendMessage(username+": "+textBox2.Text) ;
textBox2.Text="";
}
}
}
}
// That's all ... it's all easy if you are willing understand !
// Make a printout of it & open your .net sdk for better understanding :)
If you have any comments or doubts or find something terrible wrong in program or comments. Please feel free to e-mail me !