关于线程与socket的问题

Question

我现在要建立一个SOCKET服务端，要实现的功能如下：
客户端利用Conn:连接命令用于连接接口服务器。格式: Conn 用户名 口令。如Conn aaa bbb。
如果错误则返回error.
客户端利用Sear:查询编码,返回相关信息。参数为编码和主叫号码。格式: search 编码。如 search 1212122
如果错误则返回error.
end 退出
建议:返回消息用##NL表示换行。疑问：怎么样确定是否已经用Conn连接？客户端用END退出是须要消毁此线程吗？如果消毁线程之后怎么重起？

Answer 1

让服务端给你回发一个消息，用来确定是否已经连接！
线程销毁了，用new再建就是了！

Answer 2

bool user = false;
        string strRead = null;
            bool done = false;
            TcpListener listener = new TcpListener(portNum);
            listener.Start();
             Console.WriteLine("Waiting for connection...");
            while (!done)
            {
                TcpClient client = listener.AcceptTcpClient();
                Console.WriteLine("connecting....");
                NetworkStream ns = client.GetStream();
                
                byte[] bytes = new byte[1024];
                int bytesRead = ns.Read(bytes, 0, bytes.Length);
                if (bytesRead == 0)
                {
                    continue;
                }
                strRead = Encoding.ASCII.GetString(bytes, 0, bytesRead);                if (strRead == "cnn")
                {
                    byte[] byteTime = Encoding.ASCII.GetBytes("OK");
                    try
                    {
                        ns.Write(byteTime, 0, byteTime.Length);
                        ns.Close();
                        client.Close();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }
                    user = true;
                    continue;
                }
                if (user)
                {
                    if (strRead == "123")
                    {
                        byte[] byteTime = Encoding.ASCII.GetBytes(DateTime.Now.ToString());
                        try
                        {
                            ns.Write(byteTime, 0, byteTime.Length);
                            ns.Close();
                            client.Close();
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.ToString());
                        }
                        continue;
                    }
                    if (strRead == "246")
                    {
                        byte[] byteTime = Encoding.ASCII.GetBytes("Yes");
                        try
                        {
                            ns.Write(byteTime, 0, byteTime.Length);
                            ns.Close();
                            client.Close();
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.ToString());
                        }
                        continue;
                    }
                }
                else
                {
                    byte[] byteTime = Encoding.ASCII.GetBytes("error");
                    try
                    {
                        ns.Write(byteTime, 0, byteTime.Length);
                        ns.Close();
                        client.Close();
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.ToString());
                    }
                }                
            } 
            listener.Stop(); sjm2003 这样子写是否正确？