в 15:31, 26 мая 2010

2010-05-26T15:31:19Z

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2010-05-26T11:47:13Z

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==Chat Application==

<source lang="csharp">
/*
Professional Windows GUI Programming Using C#
by Jay Glynn, Csaba Torok, Richard Conway, Wahid Choudhury,
Zach Greenvoss, Shripad Kulkarni, Neil Whitlow
Publisher: Peer Information
ISBN: 1861007663
*/
using System;
using System.Drawing;
using System.Collections;
using System.ruponentModel;
using System.Windows.Forms;
using System.Data;
using System.Net;
using System.IO;
using System.Net.Sockets;
using System.Threading;
namespace Wrox.WindowsGUIProgramming.Chapter9
{
/// <summary>
/// Summary description for Form1.
/// </summary>
public class ChatApplication : System.Windows.Forms.Form
{
internal System.Windows.Forms.ListBox listBox1;
private System.Windows.Forms.TextBox txtMessage;
private System.Windows.Forms.Button btSend;
/// <summary>
/// Required designer variable.
/// </summary>
private System.ruponentModel.Container components = null;
private System.Windows.Forms.ruboBox cmdHost;
private System.Windows.Forms.CheckBox chkSuspendClient;
private PeerConnection p = null;
public ChatApplication()
{
//
// Required for Windows Form Designer support
//
InitializeComponent();
//
// TODO: Add any constructor code after InitializeComponent call
//
p = new PeerConnection(4048, listBox1, cmdHost);
}
/// <summary>
/// Clean up any resources being used.
/// </summary>
protected override void Dispose( bool disposing )
{
if( disposing )
{
if (components != null)
{
components.Dispose();
}
}
base.Dispose( disposing );
}
#region Windows Form Designer generated code
/// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.listBox1 = new System.Windows.Forms.ListBox();
this.txtMessage = new System.Windows.Forms.TextBox();
this.btSend = new System.Windows.Forms.Button();
this.cmdHost = new System.Windows.Forms.ruboBox();
this.chkSuspendClient = new System.Windows.Forms.CheckBox();
this.SuspendLayout();
//
// listBox1
//
this.listBox1.Name = "listBox1";
this.listBox1.Size = new System.Drawing.Size(688, 394);
this.listBox1.TabIndex = 0;
//
// txtMessage
//
this.txtMessage.Location = new System.Drawing.Point(8, 408);
this.txtMessage.Name = "txtMessage";
this.txtMessage.Size = new System.Drawing.Size(576, 20);
this.txtMessage.TabIndex = 1;
this.txtMessage.Text = "";
//
// btSend
//
this.btSend.Location = new System.Drawing.Point(608, 408);
this.btSend.Name = "btSend";
this.btSend.TabIndex = 2;
this.btSend.Text = "Send";
this.btSend.Click += new System.EventHandler(this.btSend_Click);
//
// cmdHost
//
this.cmdHost.Location = new System.Drawing.Point(8, 432);
this.cmdHost.Name = "cmdHost";
this.cmdHost.Size = new System.Drawing.Size(520, 21);
this.cmdHost.TabIndex = 3;
this.cmdHost.Text = "localhost";
//
// chkSuspendClient
//
this.chkSuspendClient.Location = new System.Drawing.Point(544, 432);
this.chkSuspendClient.Name = "chkSuspendClient";
this.chkSuspendClient.Size = new System.Drawing.Size(152, 24);
this.chkSuspendClient.TabIndex = 4;
this.chkSuspendClient.Text = "Suspend Client";
this.chkSuspendClient.CheckedChanged += new System.EventHandler(this.chkSuspendClient_CheckedChanged);
//
// ChatApplication
//
this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
this.ClientSize = new System.Drawing.Size(688, 462);
this.Controls.AddRange(new System.Windows.Forms.Control[] {
this.chkSuspendClient,
this.cmdHost,
this.btSend,
this.txtMessage,
this.listBox1});
this.MaximizeBox = false;
this.Name = "ChatApplication";
this.Text = "Chat!";
this.ResumeLayout(false);
}
#endregion
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main()
{
Application.Run(new ChatApplication());
}
private void btSend_Click(object sender, System.EventArgs e)
{
p.Write(txtMessage.Text);
}
private void chkSuspendClient_CheckedChanged(object sender, System.EventArgs e)
{
if(chkSuspendClient.Checked==true)
{
p.Enabled = true;
}
else
{
p.Enabled = false;
}
}
}

public class PeerConnection
{
private System.Net.Sockets.TcpListener peerListener = null;
private System.Net.Sockets.TcpClient peerClient = null;
private System.Net.Sockets.NetworkStream netStream = null;
private Thread t1 = null;
private IntPtr formHandle;
private int port = 0;
private bool clientEnabled = true;
private ListBox lb;
private ComboBox cmb;
public PeerConnection(int port, ListBox formHandle, ComboBox cmdHost)
{
this.port = port;
this.lb = formHandle;
this.cmb = cmdHost;
t1 = new Thread(new ThreadStart(CreateListener));
t1.Name = "Listener Thread";
t1.Priority = ThreadPriority.AboveNormal;
t1.Start();
}
delegate void CallbackListbox(string message);
void SetListboxString(string item)
{
lb.Items.Add(item);
}
private void CreateListener()
{
Socket tc = null;
peerListener = new TcpListener(port);
peerListener.Start();
CallbackListbox clb = new CallbackListbox(SetListboxString);
while(true)
{
tc = peerListener.AcceptSocket();
byte[] byMessage = new byte[256];
Thread.Sleep(500);
int iLength = tc.Receive(byMessage, 0, byMessage.Length, SocketFlags.None);
if(iLength>0)
{
string message = System.Text.Encoding.Default.GetString(byMessage);
try
{
if(lb.InvokeRequired) lb.Invoke(clb, new object[]{message});
}
catch(Exception e)
{
message = e.Message;
}
finally
{
System.Diagnostics.Debug.WriteLine(message);
}
}
}
}
private void CreateClient(object message)
{
peerClient = new TcpClient();
peerClient.Connect(cmb.SelectedText, port);
netStream = peerClient.GetStream();
StreamWriter sw = new StreamWriter(netStream);
sw.Write((string)message);
sw.Flush();
peerClient.Close();
}
internal void Write(string message)
{
ThreadPool.QueueUserWorkItem(new WaitCallback(CreateClient), message);
}
internal bool Enabled
{
set
{
if(t1.ThreadState==ThreadState.Suspended&&value==true)
{
t1.Resume();
}
else if(t1.ThreadState!=ThreadState.Suspended&&value==false)
{
t1.Suspend();
}
clientEnabled = value;
}
get
{
return clientEnabled;
}
}
}
}

</source>

==Multicast Chat==

<source lang="csharp">
/*
C# Network Programming
by Richard Blum
Publisher: Sybex
ISBN: 0782141765
*/
using System;
using System.Drawing;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;
public class MulticastChat : Form
{
TextBox newText;
ListBox results;
Socket sock;
Thread receiver;
IPEndPoint multiep = new IPEndPoint(IPAddress.Parse("224.100.0.1"), 9050);
public MulticastChat()
{
Text = "Multicast Chat Program";
Size = new Size(400, 380);
Label label1 = new Label();
label1.Parent = this;
label1.Text = "Enter text string:";
label1.AutoSize = true;
label1.Location = new Point(10, 30);
newText = new TextBox();
newText.Parent = this;
newText.Size = new Size(200, 2 * Font.Height);
newText.Location = new Point(10, 55);
results = new ListBox();
results.Parent = this;
results.Location = new Point(10, 85);
results.Size = new Size(360, 18 * Font.Height);
Button sendit = new Button();
sendit.Parent = this;
sendit.Text = "Send";
sendit.Location = new Point(220,52);
sendit.Size = new Size(5 * Font.Height, 2 * Font.Height);
sendit.Click += new EventHandler(ButtonSendOnClick);
Button closeit = new Button();
closeit.Parent = this;
closeit.Text = "Close";
closeit.Location = new Point(290, 52);
closeit.Size = new Size(5 * Font.Height, 2 * Font.Height);
closeit.Click += new EventHandler(ButtonCloseOnClick);
sock = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
sock.Bind(iep);
sock.SetSocketOption(SocketOptionLevel.IP, SocketOptionName.AddMembership, new MulticastOption(IPAddress.Parse("224.100.0.1")));
receiver = new Thread(new ThreadStart(packetReceive));
receiver.IsBackground = true;
receiver.Start();
}
void ButtonSendOnClick(object obj, EventArgs ea)
{
byte[] message = Encoding.ASCII.GetBytes(newText.Text);
newText.Clear();
sock.SendTo(message, SocketFlags.None, multiep);
}
void ButtonCloseOnClick(object obj, EventArgs ea)
{
receiver.Abort();
sock.Close();
Close();
}
void packetReceive()
{
EndPoint ep = (EndPoint)multiep;
byte[] data = new byte[1024];
string stringData;
int recv;
while (true)
{
recv = sock.ReceiveFrom(data, ref ep);
stringData = Encoding.ASCII.GetString(data, 0, recv);
results.Items.Add("from " + ep.ToString() + ": " + stringData);
}
}
public static void Main()
{
Application.Run(new MulticastChat());
}
}

</source>

==New Tcp Chat==

<source lang="csharp">
/*
C# Network Programming
by Richard Blum
Publisher: Sybex
ISBN: 0782141765
*/
using System;
using System.Drawing;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;

public class NewTcpChat : Form
{
private static TextBox newText;
private static ListBox results;
private static ListBox hosts;
private static Socket client;
private static byte[] data = new byte[1024];
public NewTcpChat()
{
Text = "New TCP Chat Program";
Size = new Size(400, 380);

Label label1 = new Label();
label1.Parent = this;
label1.Text = "Enter text string:";
label1.AutoSize = true;
label1.Location = new Point(10, 30);
newText = new TextBox();
newText.Parent = this;
newText.Size = new Size(200, 2 * Font.Height);
newText.Location = new Point(10, 55);
results = new ListBox();
results.Parent = this;
results.Location = new Point(10, 85);
results.Size = new Size(360, 10 * Font.Height);
Label label2 = new Label();
label2.Parent = this;
label2.Text = "Active hosts";
label2.AutoSize = true;
label2.Location = new Point(10, 240);
hosts = new ListBox();
hosts.Parent = this;
hosts.Location = new Point(10, 255);
hosts.Size = new Size(360, 5 * Font.Height);
Button sendit = new Button();
sendit.Parent = this;
sendit.Text = "Send";
sendit.Location = new Point(220,52);
sendit.Size = new Size(5 * Font.Height, 2 * Font.Height);
sendit.Click += new EventHandler(ButtonSendOnClick);
Button connect = new Button();
connect.Parent = this;
connect.Text = "Connect";
connect.Location = new Point(295, 20);
connect.Size = new Size(6 * Font.Height, 2 * Font.Height);
connect.Click += new EventHandler(ButtonConnectOnClick);
Button listen = new Button();
listen.Parent = this;
listen.Text = "Listen";
listen.Location = new Point(295,52);
listen.Size = new Size(6 * Font.Height, 2 * Font.Height);
listen.Click += new EventHandler(ButtonListenOnClick);
Thread fh = new Thread(new ThreadStart(findHosts));
fh.IsBackground = true;
fh.Start();
}
void ButtonListenOnClick(object obj, EventArgs ea)
{
results.Items.Add("Listening for a client...");
Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
newsock.Bind(iep);
newsock.Listen(5);
newsock.BeginAccept(new AsyncCallback(AcceptConn), newsock);
Thread advertise = new Thread(new ThreadStart(srvrAdvertise));
advertise.IsBackground = true;
advertise.Start();
}
void ButtonConnectOnClick(object obj, EventArgs ea)
{
results.Items.Add("Connecting...");
client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
string selectedhost = (string)hosts.SelectedItem;
string[] hostarray = selectedhost.Split(":");
IPEndPoint iep = new IPEndPoint(IPAddress.Parse(hostarray[1]), 9050);
client.BeginConnect(iep, new AsyncCallback(Connected), client);
}
void ButtonSendOnClick(object obj, EventArgs ea)
{
byte[] message = Encoding.ASCII.GetBytes(newText.Text);
newText.Clear();
client.BeginSend(message, 0, message.Length, 0, new AsyncCallback(SendData), client);
}
void AcceptConn(IAsyncResult iar)
{
Socket oldserver = (Socket)iar.AsyncState;
client = oldserver.EndAccept(iar);
results.Items.Add("Connection from: " + client.RemoteEndPoint.ToString());
Thread receiver = new Thread(new ThreadStart(ReceiveData));
receiver.IsBackground = true;
receiver.Start();
}
void Connected(IAsyncResult iar)
{
try
{
client.EndConnect(iar);
results.Items.Add("Connected to: " + client.RemoteEndPoint.ToString());
Thread receiver = new Thread(new ThreadStart(ReceiveData));
receiver.IsBackground = true;
receiver.Start();
} catch (SocketException)
{
results.Items.Add("Error connecting");
}
}
void SendData(IAsyncResult iar)
{
Socket remote = (Socket)iar.AsyncState;
int sent = remote.EndSend(iar);
}
void ReceiveData()
{
int recv;
string stringData;
while (true)
{
recv = client.Receive(data);
stringData = Encoding.ASCII.GetString(data, 0, recv);
if (stringData == "bye")
break;
results.Items.Add(stringData);
}
stringData = "bye";
byte[] message = Encoding.ASCII.GetBytes(stringData);
client.Send(message);
client.Close();
results.Items.Add("Connection stopped");
return;
}
void srvrAdvertise()
{
Socket server = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
server.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.Broadcast, 1);
IPEndPoint iep = new IPEndPoint(IPAddress.Broadcast, 9051);
byte[] hostname = Encoding.ASCII.GetBytes(Dns.GetHostName());
while (true)
{
server.SendTo(hostname, iep);
Thread.Sleep(60000);
}
}
void findHosts()
{
while(true)
{
Socket remoteHosts = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9051);
EndPoint ep = (EndPoint)iep;
remoteHosts.Bind(iep);
byte[] data = new byte[1024];
int recv = remoteHosts.ReceiveFrom(data, ref ep);
string stringData = Encoding.ASCII.GetString(data, 0, recv);
string entry = stringData + ":" + ep.ToString();
if (!hosts.Items.Contains(entry))
hosts.Items.Add(entry);
}
}
public static void Main()
{
Application.Run(new NewTcpChat());
}
}

</source>

==Tcp Chat==

<source lang="csharp">
/*
C# Network Programming
by Richard Blum
Publisher: Sybex
ISBN: 0782141765
*/
using System;
using System.Drawing;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;

public class TcpChat : Form
{
private static TextBox newText;
private static ListBox results;
private static Socket client;
private static byte[] data = new byte[1024];
public TcpChat()
{
Text = "TCP Chat Program";
Size = new Size(400, 380);

Label label1 = new Label();
label1.Parent = this;
label1.Text = "Enter text string:";
label1.AutoSize = true;
label1.Location = new Point(10, 30);
newText = new TextBox();
newText.Parent = this;
newText.Size = new Size(200, 2 * Font.Height);
newText.Location = new Point(10, 55);
results = new ListBox();
results.Parent = this;
results.Location = new Point(10, 85);
results.Size = new Size(360, 18 * Font.Height);
Button sendit = new Button();
sendit.Parent = this;
sendit.Text = "Send";
sendit.Location = new Point(220,52);
sendit.Size = new Size(5 * Font.Height, 2 * Font.Height);
sendit.Click += new EventHandler(ButtonSendOnClick);
Button connect = new Button();
connect.Parent = this;
connect.Text = "Connect";
connect.Location = new Point(295, 20);
connect.Size = new Size(6 * Font.Height, 2 * Font.Height);
connect.Click += new EventHandler(ButtonConnectOnClick);
Button listen = new Button();
listen.Parent = this;
listen.Text = "Listen";
listen.Location = new Point(295,52);
listen.Size = new Size(6 * Font.Height, 2 * Font.Height);
listen.Click += new EventHandler(ButtonListenOnClick);
}
void ButtonListenOnClick(object obj, EventArgs ea)
{
results.Items.Add("Listening for a client...");
Socket newsock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
newsock.Bind(iep);
newsock.Listen(5);
newsock.BeginAccept(new AsyncCallback(AcceptConn), newsock);
}
void ButtonConnectOnClick(object obj, EventArgs ea)
{
results.Items.Add("Connecting...");
client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
IPEndPoint iep = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 9050);
client.BeginConnect(iep, new AsyncCallback(Connected), client);
}
void ButtonSendOnClick(object obj, EventArgs ea)
{
byte[] message = Encoding.ASCII.GetBytes(newText.Text);
newText.Clear();
client.BeginSend(message, 0, message.Length, 0, new AsyncCallback(SendData), client);
}
void AcceptConn(IAsyncResult iar)
{
Socket oldserver = (Socket)iar.AsyncState;
client = oldserver.EndAccept(iar);
results.Items.Add("Connection from: " + client.RemoteEndPoint.ToString());
Thread receiver = new Thread(new ThreadStart(ReceiveData));
receiver.Start();
}
void Connected(IAsyncResult iar)
{
try
{
client.EndConnect(iar);
results.Items.Add("Connected to: " + client.RemoteEndPoint.ToString());
Thread receiver = new Thread(new ThreadStart(ReceiveData));
receiver.Start();
} catch (SocketException)
{
results.Items.Add("Error connecting");
}
}
void SendData(IAsyncResult iar)
{
Socket remote = (Socket)iar.AsyncState;
int sent = remote.EndSend(iar);
}
void ReceiveData()
{
int recv;
string stringData;
while (true)
{
recv = client.Receive(data);
stringData = Encoding.ASCII.GetString(data, 0, recv);
if (stringData == "bye")
break;
results.Items.Add(stringData);
}
stringData = "bye";
byte[] message = Encoding.ASCII.GetBytes(stringData);
client.Send(message);
client.Close();
results.Items.Add("Connection stopped");
return;
}
public static void Main()
{
Application.Run(new TcpChat());
}
}

</source>

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Admin: 1 версия