Socket programming in C#.NET

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.NET3.5

.NET

Visual-Studio

C#3.5

, +

I tried the following code to create a server and a client using C#.NET.

Server and Client both are running but not responding.

But nothing is displayed in Server side.

If i use

MessageBox.Show()

instead of textBox.text, then it's displaying the messages.

I want to display the messages in the textBox.

Please help me.

I guess the problem is in the following lines of code.

/* receive */
                   byte[] bytesFrom = new byte[100000];
                   networkStream.Read(bytesFrom, 0, clientSocket.ReceiveBufferSize);
                   string dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
                   textBox1.Text="Received From Clinet:" + dataFromClient;

What I have tried:

Server code in C#.NET

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net.Sockets;

namespace Server
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)// start server
        {           
            TcpListener serverSocket = new TcpListener(System.Net.IPAddress.Any, 8888);
            TcpClient clientSocket = default(TcpClient);
            serverSocket.Start();               
            textBox1.Text="Server Started";
            clientSocket = serverSocket.AcceptTcpClient();
            textBox1.Text="Got a connection from Client";           
            while(true)
            {
                try
                {
                    NetworkStream networkStream = clientSocket.GetStream();
                    /* receive */
                    byte[] bytesFrom = new byte[100000];
                    networkStream.Read(bytesFrom, 0, clientSocket.ReceiveBufferSize);
                    string dataFromClient = System.Text.Encoding.ASCII.GetString(bytesFrom);
                    textBox1.Text="Received From Clinet:" + dataFromClient;
                    /*send*/
                    string serverResponse = "Server says: Hi Client!";
                    Byte[] sendBytes = Encoding.ASCII.GetBytes(serverResponse);
                    networkStream.Write(sendBytes, 0, sendBytes.Length);
                    networkStream.Flush();                   
                }
                catch (Exception ex)
                {
                    MessageBox.Show(ex.ToString());
                }
            }
       }
    }
}

Client Code in C#.NET

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 Client
{
    public partial class Form1 : Form
    {
        System.Net.Sockets.TcpClient clientSocket = new System.Net.Sockets.TcpClient();
       
        public Form1()
        {
            InitializeComponent();
        }
        private void button2_Click(object sender, EventArgs e)//connect to server
        {
            clientSocket.Connect("127.0.0.1", 8888);
            MessageBox.Show("Connected to Server");
           
        }  
        private void button1_Click(object sender, EventArgs e) // Send msg
        {
            NetworkStream serverStream = clientSocket.GetStream();    

            /* send msg to server */ 
            // textBox2.Text = msg to be sent to server
            byte[] outStream = System.Text.Encoding.ASCII.GetBytes(textBox2.Text);
            serverStream.Write(outStream, 0, outStream.Length);
            serverStream.Flush();

            /* receive msg from server */
            byte[] inStream = new byte[100000]; 
            serverStream.Read(inStream, 0, clientSocket.ReceiveBufferSize);
            string receivedMsg = System.Text.Encoding.ASCII.GetString(inStream);
            textBox1.Text = receivedMsg; // textBox1 to display the received msg


            textBox2.Text = ""; // clear textBox2
            textBox2.Focus();
        }           
    }
}