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[C#] TCP, UDP MultiThread Client Source Code

by Luyin 2013. 1. 7.

[C#] TCP, UDP MultiThread Client Source Code

/* Project: Simple TCP/UDP Client v2
* Author : Patrick Lam
* Date : 09/19/2001
* Brief : The simple TCP/UDP Client v2 does exactly the same thing as v1. What 
itintends
* to demonstrate is the amount of code you can save by using TcpClient and UdpClient
* instead of the traditional raw socket implementation. When you
* compare the following code with v1, you will see the difference.
* Usage : sampleTcpUdpClient2   "Any message."
* Example: sampleTcpUdpClient2 TCP localhost "hello. how are you?"
* Bugs : When you send a message with UDP, you can't specify localhost as the
* destination. Doing so will produce an exception. Can't figure out why yet. The workaround
* to use the machine's hostname instead.
*/

using System;
using System.Net;
using System.Net.Sockets;
using System.Threading;

namespace SmartGridClient
{

    public class sampleTcpUdpClient2
    {
        public enum clientType { TCP, UDP }; //Type of connection the client is making. 
        private const int ANYPORT = 0;
        private const int SAMPLETCPPORT = 4567;
        private const int SAMPLEUDPPORT = 4568;
        private bool readData = false;
        public clientType cliType;
        private bool DONE = false;
        public sampleTcpUdpClient2(clientType CliType)
        {
            this.cliType = CliType;
        }
        public void sampleTcpClient2(String serverName, String whatEver)
        {
            try
            {
                //Create an instance of TcpClient. 
                TcpClient tcpClient = new TcpClient(serverName, SAMPLETCPPORT);
                //Create a NetworkStream for this tcpClient instance. 
                //This is only required for TCP stream. 
                NetworkStream tcpStream = tcpClient.GetStream();
                if (tcpStream.CanWrite)
                {
                    Byte[] inputToBeSent = System.Text.Encoding.ASCII.GetBytes(whatEver.ToCharArray());
                    tcpStream.Write(inputToBeSent, 0, inputToBeSent.Length);
                    tcpStream.Flush();
                }
                while (tcpStream.CanRead && !DONE)
                {
                    //We need the DONE condition here because there is possibility that 
                    //the stream is ready to be read while there is nothing to be read. 
                    if (tcpStream.DataAvailable)
                    {
                        Byte[] received = new Byte[512];
                        int nBytesReceived = tcpStream.Read(received, 0, received.Length);
                        String dataReceived = System.Text.Encoding.ASCII.GetString(received);
                        Console.WriteLine(dataReceived);
                        DONE = true;
                    }
                }
            }
            catch (Exception e)
            {
                Console.WriteLine("An Exception has occurred.");
                Console.WriteLine(e.ToString());
            }
        }
        public void sampleUdpClient2(String serverName, String whatEver)
        {
            try
            {
                //Create an instance of UdpClient. 
                UdpClient udpClient = new UdpClient(serverName, SAMPLEUDPPORT);
                Byte[] inputToBeSent = new Byte[256];
                inputToBeSent = System.Text.Encoding.ASCII.GetBytes(whatEver.ToCharArray());
                IPHostEntry remoteHostEntry = Dns.GetHostByName(serverName);
                IPEndPoint remoteIpEndPoint = new IPEndPoint(remoteHostEntry.AddressList[0], SAMPLEUDPPORT);
                int nBytesSent = udpClient.Send(inputToBeSent, inputToBeSent.Length);
                Byte[] received = new Byte[512];
                received = udpClient.Receive(ref remoteIpEndPoint);
                String dataReceived = System.Text.Encoding.ASCII.GetString(received);
                Console.WriteLine(dataReceived);
                udpClient.Close();
            }
            catch (Exception e)
            {
                Console.WriteLine("An Exception Occurred!");
                Console.WriteLine(e.ToString());
            }
        }
        public static void Main(String[] argv)
        {
            if (argv.Length < 3)
            {
                Console.WriteLine("Usage: sampleTcpUdpClient2   Message");
                Console.WriteLine("Example: sampleTcpUdpClient2 TCP localhost ''hello. how are you?''");
            }
            else if ((argv[0] == "TCP") || (argv[0] == "tcp"))
            {
                sampleTcpUdpClient2 stc = new sampleTcpUdpClient2(clientType.TCP);
                stc.sampleTcpClient2(argv[1], argv[2]);
                Console.WriteLine("The TCP server is disconnected.");
            }
            else if ((argv[0] == "UDP") || (argv[0] == "udp"))
            {
                sampleTcpUdpClient2 suc = new sampleTcpUdpClient2(clientType.UDP);
                suc.sampleUdpClient2(argv[1], argv[2]);
                Console.WriteLine("The UDP server is disconnected.");
            }
        }
    } 
} 


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