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Join Date: Apr 2004
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Junior Poster
Thread's colliding? Hi. I am trying to figure out this code I found on the net that allows users to chat with each other. It gives a thread error that I just can't fix. Please help me.
This is the Form1.cs file
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This is the Form1.cs file
using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.Net.Sockets;
using System.Threading;
using System.Text;
using System.Security.Principal;
using System.Reflection;
namespace LanChat
{
public class LanChat : System.Windows.Forms.Form
{
Thread thread;
bool IsThreadRunning = false;
ReaderWriterLock rwl = new ReaderWriterLock();
ArrayList userList = new ArrayList();
public System.Windows.Forms.RichTextBox richTextBoxRecieveMsg;
public System.Windows.Forms.Label label1;
public System.Windows.Forms.ComboBox comboBoxUserNames;
public System.Windows.Forms.RichTextBox richTextBoxSendMsg;
public System.Windows.Forms.Button buttonStop;
public System.Windows.Forms.Button buttonAdvertise;
public System.Windows.Forms.Button buttonSend;
public System.Windows.Forms.ContextMenu contextMenuNotify;
public System.Windows.Forms.MenuItem menuItem3;
public System.Windows.Forms.MenuItem menuItemExit;
public System.Windows.Forms.MenuItem menuItemOpen;
public System.Windows.Forms.MenuItem menuItemAbout;
public System.Windows.Forms.NotifyIcon notifyIcon;
public PictureBox pictureBox1;
public System.ComponentModel.IContainer components;
public LanChat()
{
InitializeComponent();
thread = new Thread(new ThreadStart(MulticastListener));
thread.Start();
String message = "Hello$" + GetUserName();
MulticastSend("224.168.100.2", 1000, message);
notifyIcon.Icon = LoadIcon();
this.Icon = LoadIcon();
}
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
private void InitializeComponent()
{
this.components = new System.ComponentModel.Container();
this.richTextBoxRecieveMsg = new System.Windows.Forms.RichTextBox();
this.label1 = new System.Windows.Forms.Label();
this.comboBoxUserNames = new System.Windows.Forms.ComboBox();
this.buttonSend = new System.Windows.Forms.Button();
this.richTextBoxSendMsg = new System.Windows.Forms.RichTextBox();
this.buttonStop = new System.Windows.Forms.Button();
this.buttonAdvertise = new System.Windows.Forms.Button();
this.contextMenuNotify = new System.Windows.Forms.ContextMenu();
this.menuItemOpen = new System.Windows.Forms.MenuItem();
this.menuItemAbout = new System.Windows.Forms.MenuItem();
this.menuItem3 = new System.Windows.Forms.MenuItem();
this.menuItemExit = new System.Windows.Forms.MenuItem();
this.notifyIcon = new System.Windows.Forms.NotifyIcon(this.components);
this.pictureBox1 = new System.Windows.Forms.PictureBox();
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit();
this.SuspendLayout();
//
// richTextBoxRecieveMsg
//
this.richTextBoxRecieveMsg.BackColor = System.Drawing.Color.WhiteSmoke;
this.richTextBoxRecieveMsg.BorderStyle = System.Windows.Forms.BorderStyle.FixedSingle;
this.richTextBoxRecieveMsg.Font = new System.Drawing.Font("Courier New", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.richTextBoxRecieveMsg.Location = new System.Drawing.Point(7, 176);
this.richTextBoxRecieveMsg.Name = "richTextBoxRecieveMsg";
this.richTextBoxRecieveMsg.ReadOnly = true;
this.richTextBoxRecieveMsg.ShowSelectionMargin = true;
this.richTextBoxRecieveMsg.Size = new System.Drawing.Size(535, 218);
this.richTextBoxRecieveMsg.TabIndex = 0;
this.richTextBoxRecieveMsg.Text = "";
//
// label1
//
this.label1.AutoSize = true;
this.label1.BackColor = System.Drawing.Color.Black;
this.label1.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.label1.Location = new System.Drawing.Point(219, 27);
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(80, 16);
this.label1.TabIndex = 1;
this.label1.Text = "User Name";
//
// comboBoxUserNames
//
this.comboBoxUserNames.BackColor = System.Drawing.Color.WhiteSmoke;
this.comboBoxUserNames.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
this.comboBoxUserNames.Location = new System.Drawing.Point(305, 25);
this.comboBoxUserNames.Name = "comboBoxUserNames";
this.comboBoxUserNames.Size = new System.Drawing.Size(152, 21);
this.comboBoxUserNames.TabIndex = 2;
//
// buttonSend
//
this.buttonSend.BackColor = System.Drawing.Color.Black;
this.buttonSend.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonSend.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.buttonSend.ForeColor = System.Drawing.Color.White;
this.buttonSend.Location = new System.Drawing.Point(548, 409);
this.buttonSend.Name = "buttonSend";
this.buttonSend.Size = new System.Drawing.Size(72, 48);
this.buttonSend.TabIndex = 3;
this.buttonSend.Text = "Send";
this.buttonSend.UseVisualStyleBackColor = false;
this.buttonSend.Click += new System.EventHandler(this.buttonSend_Click);
//
// richTextBoxSendMsg
//
this.richTextBoxSendMsg.BackColor = System.Drawing.Color.WhiteSmoke;
this.richTextBoxSendMsg.BorderStyle = System.Windows.Forms.BorderStyle.None;
this.richTextBoxSendMsg.Font = new System.Drawing.Font("Microsoft Sans Serif", 9F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.richTextBoxSendMsg.Location = new System.Drawing.Point(7, 409);
this.richTextBoxSendMsg.MaxLength = 500;
this.richTextBoxSendMsg.Name = "richTextBoxSendMsg";
this.richTextBoxSendMsg.ShowSelectionMargin = true;
this.richTextBoxSendMsg.Size = new System.Drawing.Size(535, 48);
this.richTextBoxSendMsg.TabIndex = 4;
this.richTextBoxSendMsg.Text = "";
//
// buttonStop
//
this.buttonStop.BackColor = System.Drawing.Color.Black;
this.buttonStop.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonStop.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.buttonStop.Location = new System.Drawing.Point(355, 73);
this.buttonStop.Name = "buttonStop";
this.buttonStop.Size = new System.Drawing.Size(100, 24);
this.buttonStop.TabIndex = 5;
this.buttonStop.Text = "Stop";
this.buttonStop.UseVisualStyleBackColor = false;
this.buttonStop.Click += new System.EventHandler(this.buttonStop_Click);
//
// buttonAdvertise
//
this.buttonAdvertise.BackColor = System.Drawing.Color.Black;
this.buttonAdvertise.FlatStyle = System.Windows.Forms.FlatStyle.Flat;
this.buttonAdvertise.Font = new System.Drawing.Font("Courier New", 9.75F, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.buttonAdvertise.Location = new System.Drawing.Point(249, 73);
this.buttonAdvertise.Name = "buttonAdvertise";
this.buttonAdvertise.Size = new System.Drawing.Size(100, 24);
this.buttonAdvertise.TabIndex = 6;
this.buttonAdvertise.Text = "Advertise";
this.buttonAdvertise.UseVisualStyleBackColor = false;
this.buttonAdvertise.Click += new System.EventHandler(this.buttonAdvertise_Click);
//
// contextMenuNotify
//
this.contextMenuNotify.MenuItems.AddRange(new System.Windows.Forms.MenuItem[] {
this.menuItemOpen,
this.menuItemAbout,
this.menuItem3,
this.menuItemExit});
//
// menuItemOpen
//
this.menuItemOpen.Index = 0;
this.menuItemOpen.Text = "Open";
this.menuItemOpen.Click += new System.EventHandler(this.menuItemOpen_Click);
//
// menuItemAbout
//
this.menuItemAbout.Index = 1;
this.menuItemAbout.Text = "About LanChat";
this.menuItemAbout.Click += new System.EventHandler(this.menuItemAbout_Click);
//
// menuItem3
//
this.menuItem3.Index = 2;
this.menuItem3.Text = "-";
//
// menuItemExit
//
this.menuItemExit.Index = 3;
this.menuItemExit.Text = "Exit";
this.menuItemExit.Click += new System.EventHandler(this.menuItemExit_Click);
//
// notifyIcon
//
this.notifyIcon.ContextMenu = this.contextMenuNotify;
this.notifyIcon.Text = "notifyIcon";
this.notifyIcon.Visible = true;
this.notifyIcon.DoubleClick += new System.EventHandler(this.notifyIcon_DoubleClick);
//
// pictureBox1
//
this.pictureBox1.Image = global::LanChat.Properties.Resources.forweb;
this.pictureBox1.Location = new System.Drawing.Point(12, 12);
this.pictureBox1.Name = "pictureBox1";
this.pictureBox1.Size = new System.Drawing.Size(201, 151);
this.pictureBox1.SizeMode = System.Windows.Forms.PictureBoxSizeMode.Zoom;
this.pictureBox1.TabIndex = 7;
this.pictureBox1.TabStop = false;
//
// LanChat
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.BackColor = System.Drawing.Color.Black;
this.ClientSize = new System.Drawing.Size(632, 469);
this.Controls.Add(this.pictureBox1);
this.Controls.Add(this.buttonAdvertise);
this.Controls.Add(this.buttonStop);
this.Controls.Add(this.richTextBoxRecieveMsg);
this.Controls.Add(this.richTextBoxSendMsg);
this.Controls.Add(this.buttonSend);
this.Controls.Add(this.comboBoxUserNames);
this.Controls.Add(this.label1);
this.ForeColor = System.Drawing.Color.White;
this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.FixedSingle;
this.MaximizeBox = false;
this.Name = "LanChat";
this.ShowInTaskbar = false;
this.Text = "Chat";
this.Closing += new System.ComponentModel.CancelEventHandler(this.Form1_Closing);
((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit();
this.ResumeLayout(false);
this.PerformLayout();
}
#endregion
[STAThread]
static void Main()
{
LanChat f = new LanChat();
Application.Run(f);
}
public void buttonSend_Click(object sender, EventArgs e)
{
if(richTextBoxSendMsg.Text == "")
return;
String message = "MSG:$" + GetUserName() +" : " + richTextBoxSendMsg.Text;
string []host = comboBoxUserNames.Text.Split('\\');
if(host.Length >1)
{
string hostName = Dns.GetHostByName(host[0]).AddressList[0].ToString();
MulticastSend(hostName, 1000, message);
richTextBoxSendMsg.Text = "";
}
}
public void buttonAdvertise_Click(object sender, System.EventArgs e)
{
String message = "Hello$" + GetUserName();
MulticastSend("224.168.100.2", 1000, message);
}
public void buttonStop_Click(object sender, System.EventArgs e)
{
String message = "Stop$" + GetUserName();
MulticastSend("224.168.100.2", 1000, message);
}
public void Form1_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
rwl.AcquireWriterLock(10);
IsThreadRunning = false;
rwl.ReleaseWriterLock();
thread.Abort();
}
public void MulticastListener()
{
recv("224.168.100.2", "1000");
this.Controls.Add(this.comboBoxUserNames);
}
public void MulticastSend(string mAddress, int port, string message)
{
try
{
IPAddress GroupAddress = IPAddress.Parse(mAddress);
int GroupPort = port;
UdpClient sender = new UdpClient();
IPEndPoint groupEP = new IPEndPoint(GroupAddress,GroupPort);
byte[] bytes = Encoding.ASCII.GetBytes(message);
sender.Send(bytes, bytes.Length, groupEP);
sender.Close();
}
catch (Exception e)
{
MessageBox.Show(e.ToString());
}
}
void recv(string mcastGroup, string port)
{
Socket s=new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint ipep=new IPEndPoint(IPAddress.Any,int.Parse(port));
s.Bind(ipep);
IPAddress ip=IPAddress.Parse(mcastGroup);
s.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(ip,IPAddress.Any));
IsThreadRunning = true;
while(IsThreadRunning)
{
byte[] b=new byte[500];
s.Receive(b);
string str = System.Text.Encoding.ASCII.GetString(b,0,b.Length);
str = str.Replace("\0","");
if(str.StartsWith("Hello"))
{
string []array = str.Split('$');
if(array.Length > 1)
{
if(!userList.Contains(array[1].ToString()))
{
userList.Add(array[1]);
UpdateComboBox();
}
}
}
else if(str.StartsWith("Stop"))
{
string []array = str.Split('$');
if(array.Length > 1)
{
if(userList.Contains(array[1].ToString()))
{
userList.Remove(array[1]);
UpdateComboBox();
}
}
}
else if(str.StartsWith("MSG:"))
{
str = str.Replace("MSG:$", "");
int start = this.richTextBoxRecieveMsg.TextLength;
int length = str.IndexOf(':');
richTextBoxRecieveMsg.AppendText(str + "\n");
if(start >= 0 && start < richTextBoxRecieveMsg.TextLength && length > 0 && length + start < richTextBoxRecieveMsg.TextLength)
{
this.richTextBoxRecieveMsg.Select(start, length);
this.richTextBoxRecieveMsg.SelectionColor = Color.Blue;
this.richTextBoxRecieveMsg.SelectionLength = 0;
}
}
}
}
public void UpdateComboBox()
{
comboBoxUserNames.Items.Clear();
comboBoxUserNames.Items.AddRange(userList.ToArray());
}
string GetUserName()
{
string str;
str = System.Security.Principal.WindowsIdentity.GetCurrent().Name.ToString();
return str;
}
Icon LoadIcon()
{
Assembly assembly = typeof(LanChat).Assembly;
string Name = "LanChat.LanChat.ico";
return new Icon(assembly.GetManifestResourceStream(Name));
}
public void notifyIcon_DoubleClick(object sender, System.EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized)
this.WindowState = FormWindowState.Normal;
this.Activate();
}
public void menuItemOpen_Click(object sender, System.EventArgs e)
{
this.Activate();
}
public void menuItemAbout_Click(object sender, System.EventArgs e)
{
About about = new About();
about.Location = Control.MousePosition;
about.Show();
}
public void menuItemExit_Click(object sender, System.EventArgs e)
{
this.Close();
}
}
}Need any more information on this question please ask...
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"A rational anachist believes that concepts such as 'state' and 'society' and 'government' have no existence save as physically exemplified in acts of self-responsible individuals.He believese that it is impossible to shift blame,share blame,distrubute blame.... as blame,guilt,responsibility are matters taking place inside human beings singly and nowhere else.But being rational,he knows that not all individuals hold his evaluations,so he tries to live perfectly in an imperfectworld...aware that his effort wil be less than perfect yet undismayed by self-knowledge of self-failure."
-Robert A. Heinlein
-----
John Roach
"A rational anachist believes that concepts such as 'state' and 'society' and 'government' have no existence save as physically exemplified in acts of self-responsible individuals.He believese that it is impossible to shift blame,share blame,distrubute blame.... as blame,guilt,responsibility are matters taking place inside human beings singly and nowhere else.But being rational,he knows that not all individuals hold his evaluations,so he tries to live perfectly in an imperfectworld...aware that his effort wil be less than perfect yet undismayed by self-knowledge of self-failure."
-Robert A. Heinlein
-----
John Roach
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Join Date: Apr 2005
Location: Dundee, Scotland
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you need to use the threadworker object
TRY MY SUGGESTIONS AT YOUR OWN RISK
Master of puppets Im pulling your strings, blinded by me, you cant see a thing. Master! Master!
Master of puppets Im pulling your strings, blinded by me, you cant see a thing. Master! Master!
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Join Date: Dec 2005
Posts: 46
Reputation:
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Here is corrected source:
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