Create a simple client, server program where the following functionalities can be performed.It can perform file transfer between client & server. This file transfer is initiated by either client...

See more:

C#

I hav written the code for server to client transfer but unable to do the opposite...
Can any1 plz help me out asap

Server code

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;

namespace ClientServerFileExchange
{
    class server
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Transfer a file");
                IPEndPoint ipEnd = new IPEndPoint(IPAddress.Any, 1234);
                Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
                sock.Bind(ipEnd);
                sock.Listen(100);
                Socket clientSock = sock.Accept();
                string fileName = "four.txt";// "Your File Name";
                string filePath = @"D:\";//Your File Path;
                byte[] fileNameByte = Encoding.ASCII.GetBytes(fileName);
                byte[] fileData = File.ReadAllBytes(filePath + fileName);
                byte[] clientData = new byte[4 + fileNameByte.Length + fileData.Length];
                byte[] fileNameLen = BitConverter.GetBytes(fileNameByte.Length);
                fileNameLen.CopyTo(clientData, 0);
                fileNameByte.CopyTo(clientData, 4);
                fileData.CopyTo(clientData, 4 + fileNameByte.Length);
                clientSock.Send(clientData);
                Console.WriteLine("File:{0} has been sent.", fileName);
                clientSock.Close();
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine("File Receiving fail." + ex.Message);
            }
            Console.Read();
        }
    }

Client code :

using System;
using System.Collections.Generic;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
namespace client
{
    class client
    {
        static void Main(string[] args)
        {
            try
            {
                Console.WriteLine("Program to transfer a file");
                IPEndPoint ipEnd = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 1234);
                Socket clientSock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
                clientSock.Connect(ipEnd);

                byte[] clientData = new byte[1024 * 5000];
                string receivedPath = "D:/sovit/";
                int receivedBytesLen = clientSock.Receive(clientData);
                Console.WriteLine("received Bytes Len {0} ", receivedBytesLen);
                int fileNameLen = BitConverter.ToInt32(clientData, 0);
                Console.WriteLine("fileNameLen  {0}",fileNameLen);
                string fileName = Encoding.ASCII.GetString(clientData, 4, fileNameLen);
                Console.WriteLine("Connection Established\n & File started receiving : {0}", fileName);
                BinaryWriter bWrite = new BinaryWriter(File.Open(receivedPath + fileName, FileMode.Append)); ;
                bWrite.Write(clientData, 4 + fileNameLen, receivedBytesLen - 4 - fileNameLen);
                Console.WriteLine("File: {0} received & saved at path: {1}", fileName, receivedPath);
                bWrite.Close();
                clientSock.Close();
                Console.ReadLine();
            }
            catch (Exception ex)
            {
                Console.WriteLine("File Sending fail." + ex.Message);
            }
            Console.Read();
        }
    }
}