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Listing all IP address and Port of client

I am new in socket programming in c#. I just want to implement a simple program of listing all the IP address and port of the client requesting in the server. I have this code, no error but the gui not appearing upon starting the project. I already allow it through firewall and still no luck. Please help me thank you.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication3
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
IPEndPoint ip = new IPEndPoint(IPAddress.Any, 9999);
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
socket.Bind(ip);
socket.Listen(10);
Socket client = socket.Accept();
IPEndPoint newclient = (IPEndPoint)client.RemoteEndPoint;
dataGridViewSelectedUsers.Rows.Add(Convert.ToString(newclient.Address), Convert.ToString(newclient.Port));
}
}
}

try the below code will list requested ip to your listening server
UdpClient udpServer = new UdpClient(11000);
while (true)
{
var remoteEP = new IPEndPoint(IPAddress.Any, 11000);
var data = udpServer.Receive(ref remoteEP); // listen on port 11000
//list received ip address
listbox.items.Add(remoteEP.Tostring);
}

my socket application doesnt connect when i try it on the internet

im programming a socket application using c# (.net framework) but when i try it on the local system or private network it works well but when i try it on two different system using internet (public network) it never connect
its my code:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.Sockets;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
SocketPermission me = new SocketPermission(NetworkAccess.Accept, TransportType.Tcp, "", SocketPermission.AllPorts);
Socket mes =
new Socket(AddressFamily.InterNetworkV6, SocketType.Stream, ProtocolType.Tcp);
Socket des;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
try
{
IPHostEntry iphost = Dns.GetHostEntry("");
IPAddress ipaddr = iphost.AddressList[0];
MessageBox.Show(ipaddr.ToString());
IPEndPoint iep = new IPEndPoint(ipaddr, 44444);
label1.Text = ipaddr.ToString();
mes.Bind(iep);
mes.Listen(4);
des = mes.Accept();
MessageBox.Show("connected");
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
}
}
private void button2_Click(object sender, EventArgs e)
{
try
{
IPHostEntry iphost = Dns.GetHostEntry("");
IPAddress ipaddr = iphost.AddressList[0];
MessageBox.Show(ipaddr.ToString());
IPEndPoint iep = new IPEndPoint(IPAddress.Parse(textBox1.Text), 44444);
mes.Connect(iep);
}
catch (Exception err)
{
MessageBox.Show(err.ToString());
}
}
}
}
textbox1 return server ipv6.
im using socket permission to open all ports for tcp .
and ipv6 because its unique .

c# TCP IP client and server no respond error

i have a simple TCP/IP client and server that does not work:
i want to use it to transfer data between some clients and a server
enter image description here
enter image description here
on server side i have:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Collections;
namespace TCP_IP_Server
{
public partial class frmMain : Form
{
private ArrayList nSockets;
public frmMain()
{
InitializeComponent();
}
private void frmMain_Load(object sender, EventArgs e)
{
IPHostEntry IPhost = Dns.GetHostByName(Dns.GetHostName());
lblStatus.Text = "IP Address: " + IPhost.AddressList[0].ToString();
nSockets = new ArrayList();
Thread thdListner = new Thread(new ThreadStart(listnerThread));
}
public void listnerThread()
{
TcpListener tcpListener = new TcpListener(8080);
tcpListener.Start();
while(true)
{
Socket handlerSocket = tcpListener.AcceptSocket();
if(handlerSocket.Connected)
{
Control.CheckForIllegalCrossThreadCalls = false;
lbConnections.Items.Add(handlerSocket.RemoteEndPoint.ToString() + " Connected.");
lock (this)
{
nSockets.Add(handlerSocket);
}
ThreadStart thdstHandler = new ThreadStart(handlerThread);
Thread thdHnadler = new Thread(thdstHandler);
thdHnadler.Start();
}
}
}
public void handlerThread()
{
Socket handlerSocket = (Socket)nSockets[nSockets.Count - 1];
NetworkStream networkStream = new NetworkStream(handlerSocket);
int thisRead = 0;
int BlockSize = 1024;
byte[] dataByte = new byte[BlockSize];
lock (this)
{
Stream fileStream = File.OpenWrite(#"%userprofile%\desktop\SubmitedFile.txt");
while(true)
{
thisRead = networkStream.Read(dataByte, 0, BlockSize);
fileStream.Write(dataByte, 0, thisRead);
if (thisRead == 0)
break;
}
fileStream.Close();
}
lbConnections.Items.Add("File Written.");
handlerSocket = null;
}
}
}
and on Clinet side:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Threading;
using System.Net;
using System.Net.Sockets;
using System.IO;
namespace TCP_IP_Client
{
public partial class frmMain : Form
{
public frmMain()
{
InitializeComponent();
}
private void btnBrowse_Click(object sender, EventArgs e)
{
ofdBrowse.ShowDialog();
txtFile.Text = ofdBrowse.FileName;
}
private void btnSend_Click(object sender, EventArgs e)
{
Stream fileStream = File.OpenRead(txtFile.Text);
byte[] fileBuffer = new byte[fileStream.Length];
fileStream.Read(fileBuffer, 0, (int)fileStream.Length);
TcpClient tcp = new TcpClient(txtServer.Text, 8080);
NetworkStream networkStream = tcp.GetStream();
networkStream.Write(fileBuffer, 0, fileBuffer.GetLength(0));
networkStream.Close();
}
}
}
i am running the server on a VPS that hase statick IP adress and the client on my own pc, but after hiting send button an exception occures:
A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond **.**.**.**:8080

1. Programmatic Issue
Don't forget to start the thread after creating
private void frmMain_Load(object sender, EventArgs e)
{
IPHostEntry IPhost = Dns.GetHostByName(Dns.GetHostName());
lblStatus.Text = "IP Address: " + IPhost.AddressList[0].ToString();
nSockets = new ArrayList();
Thread thdListner = new Thread(new ThreadStart(listnerThread));
thdListner.start();
}
2. Network Issue
Take the IP-address used by the code to host the server and Ping the address on the client.
If succeeded, check the firewall settings of the server, client (may temporarly switch of the firewall to check if this is the problem)
If you're using dns names execute an nslookup on the client

Error in Working with Socket When Sending Object Frequently

I'm writing a program that can manage computers in a network environment.
I try to be a part of this program will assign the control of the remote client(Remote Desktop) . but my target is like teamviewer not RDC(RDP) .
i want make a service and put it into Client , that Service running every time (Automatic , Auto Start)
I use sending mouse and keyboard from server to client and screenshot of desktop of client will be transfer to server, the destination computer must control.
i write it by BackgroundWorker in loop ( in Complete_BW i put BW.RunWorkerAsync() )
i use socket and when i run program my server rise error after 1 or 2 times sent desktop image to server , error is in Socket.EndPoint ...
codes is here :
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Net;
using System.Net.NetworkInformation;
using System.Net.Sockets;
using System.IO;
namespace remServer
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
bw.RunWorkerAsync();
}
public Image GetImage(byte[] byteArrayIn)
{
Image ret = null;
try
{
MemoryStream ms = new MemoryStream(byteArrayIn);
ret = Image.FromStream(ms);
}
catch { }
return ret;
}
private void bw_DoWork(object sender, DoWorkEventArgs e)
{
FTServerCode f = new FTServerCode();
Byte[] getCap = f.StartServer();
img.Image = GetImage(getCap);
}
private void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
bw.RunWorkerAsync();
}
}
public class FTServerCode
{
IPEndPoint ipEnd;
Socket sock;
public FTServerCode()
{
try
{
ipEnd = new IPEndPoint(IPAddress.Any, 5656); // Error In this Line
sock = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.IP);
sock.Bind(ipEnd);
}
catch { }
}
public Byte[] StartServer()
{
byte[] clientData = new byte[1024 * 5000];
try
{
sock.Listen(100);
Socket clientSock = sock.Accept();
int receivedBytesLen = clientSock.Receive(clientData);
clientSock.Close();
}
catch (Exception ex)
{
MessageBox.Show("File Receving error." + ex.Message);
}
return clientData;
}
}
}
if client code is Necessary tell me to put in here . tnx

UDP Listener respond to client

I found this great code on MSDN for a UDP Client/Server connection, however the client can only send to the server, it cant reply back. How can I make this so the server can respond to the client that send the message.
The Server
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Security.Cryptography;
namespace UDP_Server
{
class Program
{
private const int listenPort = 11000;
private static void StartListener()
{
bool done = false;
UdpClient listener = new UdpClient(listenPort);
IPEndPoint groupEP = new IPEndPoint(IPAddress.Any, listenPort);
try
{
while (!done)
{
Console.WriteLine("Waiting for broadcast");
byte[] bytes = listener.Receive(ref groupEP);
Console.WriteLine("Received broadcast from {0} :\n {1}\n",groupEP.ToString(), Encoding.ASCII.GetString(bytes, 0, bytes.Length));
}
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
}
finally
{
listener.Close();
}
}
public static int Main()
{
StartListener();
return 0;
}
}
}
And the client
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets;
using System.IO;
using System.Security.Cryptography;
namespace UDP_Client
{
class Program
{
static void Main(string[] args)
{
Send("TEST STRING");
Console.Read();
}
static void Send(string Message)
{
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPAddress broadcast = IPAddress.Parse("10.1.10.117");
byte[] sendbuf = Encoding.ASCII.GetBytes(Message);
IPEndPoint ep = new IPEndPoint(broadcast, 11000);
s.SendTo(sendbuf, ep);
}
}
}

Just do it the other way round. Call StartListener on the client and it can receive udp data like a server.
On your server just send data with the clients code.

It's the same code, just with reversed roles. The client needs to listen on some port, and the server sends the message to the client's endpoint instead of the broadcast address.