Example
using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
class TcpChat
{
static void Main(string[] args)
{
if(args.Length == 0)
{
Console.WriteLine("Basic TCP chat");
Console.WriteLine();
Console.WriteLine("Usage:");
Console.WriteLine("tcpchat server <port>");
Console.WriteLine("tcpchat client <url> <port>");
return;
}
try
{
Run(args);
}
catch(IOException)
{
Console.WriteLine("--- Connection lost");
}
catch(SocketException ex)
{
Console.WriteLine("--- Can't connect: " + ex.Message);
}
}
static void Run(string[] args)
{
TcpClient client;
NetworkStream stream;
byte[] buffer = new byte[256];
var encoding = Encoding.ASCII;
if(args[0].StartsWith("s", StringComparison.InvariantCultureIgnoreCase))
{
var port = int.Parse(args[1]);
var listener = new TcpListener(IPAddress.Any, port);
listener.Start();
Console.WriteLine("--- Waiting for a connection...");
client = listener.AcceptTcpClient();
}
else
{
var hostName = args[1];
var port = int.Parse(args[2]);
client = new TcpClient();
client.Connect(hostName, port);
}
stream = client.GetStream();
Console.WriteLine("--- Connected. Start typing! (exit with Ctrl-C)");
while(true)
{
if(Console.KeyAvailable)
{
var lineToSend = Console.ReadLine();
var bytesToSend = encoding.GetBytes(lineToSend + "\r\n");
stream.Write(bytesToSend, 0, bytesToSend.Length);
stream.Flush();
}
if (stream.DataAvailable)
{
var receivedBytesCount = stream.Read(buffer, 0, buffer.Length);
var receivedString = encoding.GetString(buffer, 0, receivedBytesCount);
Console.Write(receivedString);
}
}
}
}
