Server program (Console application)
using System;
using System.Threading;
using System.Net.Sockets;
using System.Text;
using System.Net;
using System.IO;
namespace ConsoleApplication
{
class Program
{
public Socket socketStream;
private BinaryWriter writer;
private BinaryReader rader;
static void Main(string[] args)
{
//IPEndPoint serverSocket = new IPEndPoint(IPAddress.Any, 1215);
Int32 port = 1215;
IPAddress localAddr = IPAddress.Parse("10.14.40.228");
TcpListener serverSocket = new TcpListener(localAddr, port);
TcpClient clientSocket = default(TcpClient);
int counter = 0;
serverSocket.Start();
Console.WriteLine(" >> " + "Server Started");
counter = 0;
while (true)
{
counter += 1;
clientSocket = serverSocket.AcceptTcpClient();
socketStream = new NetworkStream(clientSocket);
Console.WriteLine(" >> " + "Client No:" + Convert.ToString(counter) + " started!");
handleClinet client = new handleClinet();
client.startClient(clientSocket, Convert.ToString(counter));
}
clientSocket.Close();
serverSocket.Stop();
Console.WriteLine(" >> " + "exit");
Console.ReadLine();
}
}
//Class to handle each client request separatly
public class handleClinet
{
TcpClient clientSocket;
string clNo;
public void startClient(TcpClient inClientSocket, string clineNo)
{
this.clientSocket = inClientSocket;
this.clNo = clineNo;
Thread ctThread = new Thread(doChat);
ctThread.Start();
}
private void doChat()
{
int requestCount = 0;
byte[] bytesFrom = new byte[10025];
string dataFromClient = null;
Byte[] sendBytes = null;
string serverResponse = null;
string rCount = null;
requestCount = 0;
while ((true))
{
try
{
requestCount = requestCount + 1;
NetworkStream networkStream = clientSocket.GetStream();
networkStream.Read(bytesFrom, 0, (int)clientSocket.ReceiveBufferSize);
dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
dataFromClient = dataFromClient.Substring(0, dataFromClient.IndexOf("$"));
Console.WriteLine(" >> " + "From client-" + clNo + dataFromClient);
rCount = Convert.ToString(requestCount);
serverResponse = "Server to clinet(" + clNo + ") " + rCount;
sendBytes = Encoding.ASCII.GetBytes(serverResponse);
networkStream.Write(sendBytes, 0, sendBytes.Length);
networkStream.Flush();
Console.WriteLine(" >> " + serverResponse);
}
catch (Exception ex)
{
Console.WriteLine(" >> " + ex.ToString());
}
finally
{
clientSocket.Close();
serverSocket.Stop();
}
}
}
}
}
Client program(windows form)
using System
using System.Collections.Generic
using System.ComponentModel
using System.Data
using System.Drawing
using System.Linq
using System.Text
using System.Windows.Forms
using System.Net.Sockets
namespace june2clnt
{
public partial class Form1 : Form
{
System.Net.Sockets.TcpClient clientSocket = new System.Net.Sockets.TcpClient()
NetworkStream serverStream
public Form1()
{
InitializeComponent()
}
private void Form1_Load_1(object sender, EventArgs e)
{
clientSocket.Connect("10.14.40.228", 1215)
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click_1(object sender, EventArgs e)
{
NetworkStream serverStream = clientSocket.GetStream()
if (serverStream.CanWrite)
{
int text = System.Convert.ToInt32(textBox1.Text)
byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textBox1.Text)
serverStream.Write(outStream, 0, outStream.Length)
serverStream.Flush()
}
else
{
clientSocket.Close()
serverStream.Close()
return
}
if (serverStream.CanRead)
{
byte[] inStream = new byte[10025]
serverStream.Read(inStream, 0, (int)clientSocket.ReceiveBufferSize)
string returndata = System.Text.Encoding.ASCII.GetString(inStream)
msg("Data from Server : " + returndata)
}
else
{
clientSocket.Close()
serverStream.Close()
return
}
}
public void msg(string mesg)
{
textBox1.Text = textBox1.Text + Environment.NewLine + " >> " + mesg
}
}
}
error when sending data from client
System.ArgumentOutofrangeException: Lenght cannot be less than Zero.
Parameter name: length
at system.String.InternalSubstrigWithChecks<int32 int32="" boolean="" falwayscopy="">
at System.String.Substring<int32 int32="" length="">
Can you help me solve the error !!!