Coding World: September 2012

using System;

using System.Text;/* this is server side code to receive data from client and sent data to client*/

using System.Net;

using System.Net.Sockets;

public class serv {

public static void Main() {

try {

IPAddress ipAd = IPAddress.Parse("172.21.5.99");//this ip is server pc local ip

/* Initializes the Listener */

TcpListener myList=new TcpListener(ipAd,8001);

/* Start Listeneting at the specified port */

myList.Start();

Console.WriteLine("The server is running at port 8001...");

Console.WriteLine("The local End point is :" +

myList.LocalEndpoint );

Console.WriteLine("Waiting for a connection.....");

Socket s=myList.AcceptSocket();

Console.WriteLine("Connection accepted from " + s.RemoteEndPoint);

byte[] b=new byte[100];

int k=s.Receive(b);

Console.WriteLine("Recieved...");

for (int i=0;i<k;i++)

Console.Write(Convert.ToChar(b[i]));

ASCIIEncoding asen=new ASCIIEncoding();

/*sent data to client */

s.Send(asen.GetBytes("The string was recieved by the server."));

Console.WriteLine("\nSent Acknowledgement");

/* clean up */

s.Close();

myList.Stop();

}

catch (Exception e) {

Console.WriteLine("Error..... " + e.StackTrace);

}

Client Side code to sent data to server

using System;

using System.IO;

using System.Net;

using System.Text;

using System.Net.Sockets;

public class clnt {

    public static void Main() {

        try {

            TcpClient tcpclnt = new TcpClient();

            Console.WriteLine("Connecting.....");

            tcpclnt.Connect("172.21.5.99",8001);//this ip adress is server pc ip adress

            Console.WriteLine("Connected");

            Console.Write("Enter the string to be transmitted : ");

            String str=Console.ReadLine();

            Stream stm = tcpclnt.GetStream();

            ASCIIEncoding asen= new ASCIIEncoding();

            byte[] ba=asen.GetBytes(str);

            Console.WriteLine("Transmitting.....");

            stm.Write(ba,0,ba.Length);//sent data to server

            byte[] bb=new byte[100];

            int k=stm.Read(bb,0,100);//receive data from server

            for (int i=0;i<k;i++)

                Console.Write(Convert.ToChar(bb[i]));

            tcpclnt.Close();

        catch (Exception e) {

            Console.WriteLine("Error..... " + e.StackTrace);

Coding World