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Acts as a client program to demonstrate the use of the NetworkStream class

Acts as a client program to demonstrate the use of the NetworkStream class
/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

// NStrCli.cs -- Acts as a client program to demonstrate the use of
//               the NetworkStream class.
//
//               Compile this program with the following command line.
//                   C:>csc NStrCli.cs
//
// To use this program with the companion server program, first start
// the server, then connect to it using the client program (this program)
// in a separate console window.
// As you enter lines from the client, they will appear in the server
// console window. To end the session, press <Enter> on a blank line.
//
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;

namespace nsStreams
{
    public class NStrCli
    {
        static public void Main ()
        {
            IPAddress hostadd = Dns.Resolve("localhost").AddressList[0];
            Console.WriteLine ("Host is " + hostadd.ToString());
            IPEndPoint EPhost = new IPEndPoint(hostadd, 2048);

            Socket s = new Socket(AddressFamily.InterNetwork,
                                  SocketType.Stream,
                                  ProtocolType.Tcp );
            string str = "Hello, World!";
            byte [] b;
            StringToByte (out b, str);
            s.Connect (EPhost);
            NetworkStream strm = new NetworkStream (s, FileAccess.ReadWrite);
            if (!s.Connected)
            {
                Console.WriteLine ("Unable to connect to host");
                return;
            }
            strm.Write (b, 0, b.Length);
            while (b[0] != 4)
            {
                string text = Console.ReadLine();
                if (text.Length == 0)
                {
                    b[0] = 4;
                    strm.Write (b, 0, 1);
                    break;
                }
                StringToByte (out b, text);
                strm.Write (b, 0, text.Length);
            }
            strm.Close ();
            s.Close ();
        }
//
// Convert a buffer of type byte to a string
        static string ByteToString (byte [] b, int start)
        {
            string str = "";
            for (int x = start; x < b.Length; ++x)
            {
                str += (char) b [x];
            }
            return (str);
        }
//
// Convert a buffer of type string to byte
        static void StringToByte (out byte [] b, string str)
        {
            b = new byte [str.Length];
            for (int x = 0; x < str.Length; ++x)
            {
                b[x] = (byte) str [x];
            }
        }
   }
}

           
       










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