[問題] socket疑問

[taoko (春秋兩不沾)]

小弟剛接觸socket，於是拿MSDN的範例程式碼來跑

可是就會一直停在"waiting for a connection......"

請問為什麼啊？

以下是MSDN的範例程式碼

using System;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;

class MyTcpListener
{
    public static void Main()
    {

        try
        {
            // Set the TcpListener on port 13000.
            Int32 port = 13000;
            IPAddress localAddr = IPAddress.Parse("127.0.0.1");

            // TcpListener server = new TcpListener(port);
            TcpListener server = new TcpListener(localAddr, port);

            // Start listening for client requests.
            server.Start();

            // Buffer for reading data
            Byte[] bytes = new Byte[256];
            String data = null;

            // Enter the listening loop.
            while (true)
            {
                Console.Write("Waiting for a connection... ");

                // Perform a blocking call to accept requests.
                // You could also user server.AcceptSocket() here.
                TcpClient client = server.AcceptTcpClient();//一直停在這邊
                Console.WriteLine("Connected!");

                data = null;

                // Get a stream object for reading and writing
                NetworkStream stream = client.GetStream();

                int i;

                // Loop to receive all the data sent by the client.
                while ((i = stream.Read(bytes, 0, bytes.Length)) != 0)
                {
                    // Translate data bytes to a ASCII string.
                    data = System.Text.Encoding.ASCII.GetString(bytes, 0, i);
                    Console.WriteLine(String.Format("Received: {0}", data));

                    // Process the data sent by the client.
                    data = data.ToUpper();

                    byte[] msg = System.Text.Encoding.ASCII.GetBytes(data);

                    // Send back a response.
                    stream.Write(msg, 0, msg.Length);
                    Console.WriteLine(String.Format("Sent: {0}", data));
                }

                // Shutdown and end connection
                client.Close();
            }
        }
        catch (SocketException e)
        {
            Console.WriteLine("SocketException: {0}", e);
        }

        Console.WriteLine("\nHit enter to continue...");
        Console.Read();
    }
}

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◆ From: 140.112.14.80
※ 編輯: taoko           來自: 140.112.14.80        (05/28 16:56)
推 cole945:因為你要找個client去連他:~   telnet 127.0.0.1 13000吧
推 taoko:無法開啟到主機的連線， 在連接埠 23連線失敗      @@"
→ taoko:請問是怎麼回事@@
推 cole945:你的port不是開在13000嗎.__.?
推 taoko:是我耍笨，忘記要先send訊息。才會一直出現Waiting....Orz
推 tomex:請善用非同步event的方式來取代古老的while loop