Question

我的代码

此服务器代码

class Program
    {
        private static readonly byte[] Localhost = {127,0,0,1};
        private const int Port = 8567;


        static void Main(string[] args)
        {
            var address = new IPAddress( Localhost );
            var endPoint = new IPEndPoint(address, Port);

            var listener = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            try
            {
                listener.Bind(endPoint);// Error in this line 
                listener.Listen(3);

                String data = "";

                while (true)
                {
                    Console.WriteLine("Listening on sport {0}", endPoint);


                    byte[] buffer = new byte[4096];

                    // handle incoming connection ...
                    var handler = listener.Accept();
                    Console.WriteLine("Handling incoming connection ...");
                    while (true)
                    {
                        int count = handler.Receive(buffer);
                        data += Encoding.UTF8.GetString(buffer, 0, count);

                        // Find start of MLLP frame, a VT character ...
                        int start = data.IndexOf((char) 0x0B);
                        if (start >= 0)
                        {
                            // Now look for the end of the frame, a FS character
                            int end = data.IndexOf((char) 0x1C);
                            if (end > start)
                            {
                                string temp = data.Substring(start + 1, end - start);

                                // handle message
                                string response = HandleMessage(temp);

                                // Send response
                                handler.Send(Encoding.UTF8.GetBytes(response));
                                break;
                            }
                        }
                    }

                    // close connection
                    handler.Shutdown( SocketShutdown.Both);
                    handler.Close();

                    Console.WriteLine("Connection closed.");

                }

            }
            catch (Exception e)
            {
                Console.WriteLine("Exception caught: {0}", e.Message);
            }
            Console.WriteLine("Terminating - press ENTER");
            Console.ReadLine();
        }

 private static string HandleMessage(string data)
        {
            Console.WriteLine("Received message");

            var msg = new Message();
            msg.Parse(data);

            Console.WriteLine("Parsed message     : {0}", msg.MessageType() );
            Console.WriteLine("Message timestamp  : {0}", msg.MessageDateTime() );
            Console.WriteLine("Message control id : {0}", msg.MessageControlId());


            // *********************************************************************
            // Here you could do something usefull with the received message ;-)
            // *********************************************************************


            // todo 


            // Create a response message
            //
            var response = new Message();

            var msh = new Segment("MSH");
            msh.Field(2, "^~\\&");
            msh.Field(7, DateTime.Now.ToString("yyyyMMddhhmmsszzz"));
            msh.Field(9, "ACK");
            msh.Field(10, Guid.NewGuid().ToString() );
            msh.Field(11, "P");
            msh.Field(12, "2.5.1");
            response.Add(msh);

            var msa = new Segment("MSA");
            msa.Field(1, "AA");
            msa.Field(2, msg.MessageControlId());
            response.Add(msa);


            // Put response message into an MLLP frame ( <VT> data <FS><CR> )
            //
            var frame = new StringBuilder();
            frame.Append((char) 0x0B);
            frame.Append(response.Serialize());
            frame.Append( (char) 0x1C);
            frame.Append( (char) 0x0D);

            return frame.ToString();
        }
    }

但我收到以下错误：

发现了SocketException： - 尝试以其访问权限禁止的方式访问套接字

请给我任何解决方案。

Answer 1

异常消息告诉您没有对您创建的套接字的访问权限。这可能是由于已经使用的套接字或运行此进程的用户具有低于必要权限的权限（非管理员权限;这不太可能是您的情况下的异常原因）。

要检查某个进程是否已在使用套接字，请打开命令提示符并执行：

netstat -o | find "8567"

SocketException被抓住了

1 个答案: