Async Tcp Server : TCP Server « Network « C# / C Sharp






Async Tcp Server

Async Tcp Server
 
/*
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.Windows.Forms;


public class AsyncTcpSrvr : Form
{
   private TextBox conStatus;
   private ListBox results;
   private byte[] data = new byte[1024];
   private int size = 1024;
   private Socket server;


   public AsyncTcpSrvr()
   {
      Text = "Asynchronous TCP Server";
      Size = new Size(400, 380);

      results = new ListBox();
      results.Parent = this;
      results.Location = new Point(10, 65);
      results.Size = new Size(350, 20 * Font.Height);

      Label label1 = new Label();
      label1.Parent = this;
      label1.Text = "Text received from client:";
      label1.AutoSize = true;
      label1.Location = new Point(10, 45);

      Label label2 = new Label();
      label2.Parent = this;
      label2.Text = "Connection Status:";
      label2.AutoSize = true;
      label2.Location = new Point(10, 330);

      conStatus = new TextBox();
      conStatus.Parent = this;
      conStatus.Text = "Waiting for client...";
      conStatus.Size = new Size(200, 2 * Font.Height);
      conStatus.Location = new Point(110, 325);

      Button stopServer = new Button();
      stopServer.Parent = this;
      stopServer.Text = "Stop Server";
      stopServer.Location = new Point(260,32);
      stopServer.Size = new Size(7 * Font.Height, 2 * Font.Height);
      stopServer.Click += new EventHandler(ButtonStopOnClick);

      server = new Socket(AddressFamily.InterNetwork,
                    SocketType.Stream, ProtocolType.Tcp);
      IPEndPoint iep = new IPEndPoint(IPAddress.Any, 9050);
      server.Bind(iep);
      server.Listen(5);
      server.BeginAccept(new AsyncCallback(AcceptConn), server);
   }

   void ButtonStopOnClick(object obj, EventArgs ea)
   {
      Close();
   }

   void AcceptConn(IAsyncResult iar)
   {
      Socket oldserver = (Socket)iar.AsyncState;
      Socket client = oldserver.EndAccept(iar);
      conStatus.Text = "Connected to: " + client.RemoteEndPoint.ToString();
      string stringData = "Welcome to my server";
      byte[] message1 = Encoding.ASCII.GetBytes(stringData);
      client.BeginSend(message1, 0, message1.Length, SocketFlags.None,
                  new AsyncCallback(SendData), client);
   }

   void SendData(IAsyncResult iar)
   {
      Socket client = (Socket)iar.AsyncState;
      int sent = client.EndSend(iar);
      client.BeginReceive(data, 0, size, SocketFlags.None,
                  new AsyncCallback(ReceiveData), client);
   }

   void ReceiveData(IAsyncResult iar)
   {
      Socket client = (Socket)iar.AsyncState;
      int recv = client.EndReceive(iar);
      if (recv == 0)
      {
         client.Close();
         conStatus.Text = "Waiting for client...";
         server.BeginAccept(new AsyncCallback(AcceptConn), server);
         return;
      }
      string receivedData = Encoding.ASCII.GetString(data, 0, recv);
      results.Items.Add(receivedData);
      byte[] message2 = Encoding.ASCII.GetBytes(receivedData);
      client.BeginSend(message2, 0, message2.Length, SocketFlags.None,
                   new AsyncCallback(SendData), client);
   }

   public static void Main()
   {
      Application.Run(new AsyncTcpSrvr());
   }
}
           
         
  








Related examples in the same category

1.Bad Tcp ServerBad Tcp Server
2.Fixed Tcp Server
3.Stream Tcp Server
4.Simple Tcp Server
5.Var Tcp Server
6.Employee Server
7.Network Order Server
8.Tcp Listener Sample
9.Select Tcp Server
10.Tcp Poll Server
11.Threaded Tcp Server
12.Picky Tcp Listener
13.TcpListener Class
14.Accepts a pending connection request