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TcpListener.LocalEndpoint Property

Gets the underlying EndPoint of the current TcpListener.

Namespace:  System.Net.Sockets
Assembly:  System (in System.dll)

public EndPoint LocalEndpoint { get; }

Property Value

Type: System.Net.EndPoint
The EndPoint to which the Socket is bound.

You can use the LocalEndpoint property to identify the local network interface and port number being used to listen for incoming client connection requests, after a socket connection has been made. You must first cast this EndPoint to an IPEndPoint. You can then call the IPEndPoint.Address property to retrieve the local IP address, and the IPEndPoint.Port property to retrieve the local port number.

The following code example displays the local IP address and port number on which the TcpListener is listening for incoming connection requests.

      try{
              // Use the Pending method to poll the underlying socket instance for client connection requests.
  				IPAddress ipAddress = Dns.Resolve("localhost").AddressList[0];
           	TcpListener tcpListener =  new TcpListener(ipAddress, portNumber); 
           	tcpListener.Start();
           	
		    	if (!tcpListener.Pending()) {

		    	Console.WriteLine("Sorry, no connection requests have arrived");
		    	
		     }
		     else{

                   //Accept the pending client connection and return a TcpClient object initialized for communication.
                   TcpClient tcpClient = tcpListener.AcceptTcpClient();
                   // Using the RemoteEndPoint property.
                   Console.WriteLine("I am listening for connections on " + 
                                               IPAddress.Parse(((IPEndPoint)tcpListener.LocalEndpoint).Address.ToString()) +
      	                                        "on port number " + ((IPEndPoint)tcpListener.LocalEndpoint).Port.ToString());
try {
    // Use the Pending method to poll the underlying socket instance for client connection requests.
    if (!tcpListener->Pending()) {
        Console::WriteLine(S"Sorry, no connection requests have arrived");
    } else {
        //Accept the pending client connection and return a TcpClient Object* initialized for communication.
        TcpClient* tcpClient = tcpListener->AcceptTcpClient();
        // Using the RemoteEndPoint property.
        Console::WriteLine(S"I am listening for connections on {0} on port number {1}", 
            IPAddress::Parse(__try_cast<IPEndPoint*>(tcpListener->LocalEndpoint)->Address->ToString()),
            __box(__try_cast<IPEndPoint*>(tcpListener->LocalEndpoint)->Port));

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0, 1.0
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