如何获取IP地址和主机名？

Question

我正在制作一个客户端，连接到本地托管的服务器，从服务器获得股票编号。如果我使用下面的代码，这个程序确实可以工作，但它的工作方式是通过获取dns名称，所以理论上它只需要www.website.com，而我不知道如何让它识别127.0.0.1的普通ip或本地主机IP：

   IPHostEntry ipHostInfo = Dns.GetHostEntry("www.website.com");
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);

附件是我的尝试，以解决ip，但我不认为我正在接近这个权利，完整的代码可以在这里看到：StockReader Client Code

    public class AsynchronousClient
{

    private const int port = 21;

    // ManualResetEvent instances signal completion.
    private static ManualResetEvent connectDone =
        new ManualResetEvent(false);
    private static ManualResetEvent sendDone =
        new ManualResetEvent(false);
    private static ManualResetEvent receiveDone =
        new ManualResetEvent(false);

    // The response from the remote device.
    private static String response = String.Empty;

    private static void StartClient()
    {
        // Connect to a remote device.
        try
        {
            // Establish the remote endpoint for the socket.
            // The name of the 

      //******************ISSUE BEGINS HERE*********************************  
            string sHostName = Dns.GetHostName();
            IPHostEntry ipHostInfo = Dns.GetHostEntry(sHostName);
            IPAddress [] ipAddress = ipHostInfo.AddressList; 
            IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);

            // Create a TCP/IP socket.
            Socket client = new Socket(AddressFamily.InterNetwork,
                SocketType.Stream, ProtocolType.Tcp);

            // Connect to the remote endpoint.
            client.BeginConnect(remoteEP,
                new AsyncCallback(ConnectCallback), client);
            connectDone.WaitOne();

            // Send test data to the remote device.
            Send(client, "This is a test<EOF>");
            sendDone.WaitOne();

            // Receive the response from the remote device.
            Receive(client);
            receiveDone.WaitOne();

            // Write the response to the console.
            Console.WriteLine("Response received : {0}", response);

            // Release the socket.
            client.Shutdown(SocketShutdown.Both);
            client.Close();

        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }
    }

Answer 1

设置ipAddress的值时，可以使用IPAddress.Parse方法传入字符串并检索IPAddress对象，而不是使用域名：

string ip = "127.0.0.1";
IPAddress address = IPAddress.Parse(ipAddress);
IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);

Answer 2

尝试使用string sHostName = "localhost";

Answer 3

// Establish the remote endpoint for the socket.  
IPAddress ipAddress = IPAddress.Parse("127.0.0.1");
IPEndPoint remoteEP = new IPEndPoint(ipAddress, portnumber);

// Create a TCP/IP socket.  
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
s.Connect(remoteEP);