C# //并非所有数据都已收到。得到更多。 handler.BeginReceive（state.buffer，0，StateObject.BufferSize，0， 新的异步回调（ReadCallback），状态）； } } } 私有静态void发送（套接字处

//并非所有数据都已收到。得到更多。 handler.BeginReceive（state.buffer，0，StateObject.BufferSize，0， 新的异步回调（ReadCallback），状态）； } } } 私有静态void发送（套接字处理程序、字符串数据） { //使用ASCII编码将字符串数据转换为字节数据。 byte[]byteData=Encoding.ASCII.GetBytes（数据）； //开始将数据发送到远程设备。 handler.BeginSend（byteData，0，byteData.Length，0， 新的异步回调（SendCallback），处理程序）； } 私有静态void SendCallback（IAsyncResult ar） { 尝试 { //从状态对象检索套接字。 套接字处理程序=（套接字）ar.AsyncState； //完成将数据发送到远程设备。 int bytesSent=handler.EndSend（ar）； WriteLine（“发送{0}字节到客户端。”，bytesSent）； handler.Shutdown（SocketShutdown.Both）； //handler.Close（）； } 捕获（例外e） { Console.WriteLine（如ToString（））； } } } }

---

发布整个异常及其发生的位置。我已在原始帖子中添加了该异常。感谢您假设Receive每次读取一条“消息”。TCP没有消息的概念。修复此问题，我将再次查看。考虑使所有事物同步。现在还不清楚您是否从异步IO中获益，它使事情变得非常复杂。我不确定您的意思是什么，将它改为同步，现在它工作得更好了

      // Read data from the client socket. 
        int bytesRead = handler.EndReceive(ar);

A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll
A first chance exception of type 'System.Net.Sockets.SocketException' occurred in System.dll
System.Net.Sockets.SocketException (0x80004005): An established connection was aborted by the software in your host machine
   at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
   at PlayServer.Network.AsynchronousSocketListener.ReadCallback(IAsyncResult ar) in c:\Users\Unknown\Documents\Visual Studio 2013\Projects\WpfApplication1\WpfApplication1\Network\TCPServer.cs:line 130

namespace PlayServer.Network
{
    // State object for reading client data asynchronously
    public class StateObject
    {
        // Client  socket.
        public Socket workSocket = null;
        // Size of receive buffer.
        public const int BufferSize = 1024;
        // Receive buffer.
        public byte[] buffer = new byte[BufferSize];
        // Received data string.
        public StringBuilder sb = new StringBuilder();
    }

    public class AsynchronousSocketListener
    {
        // Thread signal.
        public static ManualResetEvent allDone = new ManualResetEvent(false);
        public static CountdownEvent freeToSend;

        // Instances for interactions
        private static PlayerUI mainW;
        private static MainPlayer player = MainPlayer.Instance;
        private static MessageManager messageHandler = MessageManager.Instance;



        public AsynchronousSocketListener()
        {
           freeToSend = new CountdownEvent(1);
           messageHandler.registerUI(mainW);
           StartListening();
        }

        public static void registerUI(PlayerUI main)
        {
            mainW = main;
        }

        public static void StartListening()
        {
            // Data buffer for incoming data.
            byte[] bytes = new Byte[1024];

            // Establish the local endpoint for the socket.
            // The DNS name of the computer
            // running the listener is "host.contoso.com".
            IPHostEntry ipHostInfo = Dns.Resolve(Dns.GetHostName());
            IPAddress ipAddress = ipHostInfo.AddressList[0];
            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 5555);

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

            // Bind the socket to the local endpoint and listen for incoming connections.
            try
            {
                listener.Bind(localEndPoint);
                listener.Listen(100);

                while (true)
                {
                    // Set the event to nonsignaled state.
                    allDone.Reset();

                    // Start an asynchronous socket to listen for connections.
                    Console.WriteLine("Waiting for a connection...");
                    listener.BeginAccept(
                        new AsyncCallback(AcceptCallback),
                        listener);

                    // Wait until a connection is made before continuing.
                    allDone.WaitOne();
                }

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

            Console.WriteLine("\nPress ENTER to continue...");
            Console.Read();

        }

        public static void AcceptCallback(IAsyncResult ar)
        {
            // Signal the main thread to continue.
            allDone.Set();

            // Get the socket that handles the client request.
            Socket listener = (Socket)ar.AsyncState;
            Socket handler = listener.EndAccept(ar);

            // Create the state object.
            StateObject state = new StateObject();
            state.workSocket = handler;
            handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                new AsyncCallback(ReadCallback), state);
        }

        public static void ReadCallback(IAsyncResult ar)
        {
            String content = String.Empty;

            // Retrieve the state object and the handler socket
            // from the asynchronous state object.
            StateObject state = (StateObject)ar.AsyncState;
            Socket handler = state.workSocket;

            // Read data from the client socket. 
            int bytesRead = handler.EndReceive(ar);

            // Read string from client 
            string recievedMessage = Encoding.ASCII.GetString(
             state.buffer, 0, bytesRead).ToString();

            // Figure what kind of message(Operation) client requested
            string answerFromServer = messageHandler.figureMessageType(recievedMessage);

            // Wait for JSON serialization/de-serialziation to finish and then send a reply to client
            freeToSend.Wait();
            Send(handler, answerFromServer);



            if (bytesRead > 0)
            {
                // There  might be more data, so store the data received so far.
                state.sb.Append(Encoding.ASCII.GetString(
                    state.buffer, 0, bytesRead));

                // Check for end-of-file tag. If it is not there, read 
                // more data.
                content = state.sb.ToString();
                if (content.IndexOf("<EOF>") > -1)
                {
                    // All the data has been read from the 
                    // client. Display it on the console.
                    Console.WriteLine("Read {0} bytes from socket. \n Data : {1}",
                        content.Length, content);
                    // Echo the data back to the client.
                    Send(handler, content);
                }
                else
                {
                    // Not all data received. Get more.
                    handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
                    new AsyncCallback(ReadCallback), state);
                }
            }

        }


        private static void Send(Socket handler, String data)
        {
            // Convert the string data to byte data using ASCII encoding.
            byte[] byteData = Encoding.ASCII.GetBytes(data);

            // Begin sending the data to the remote device.
            handler.BeginSend(byteData, 0, byteData.Length, 0,
                new AsyncCallback(SendCallback), handler);
        }

        private static void SendCallback(IAsyncResult ar)
        {
            try
            {
                // Retrieve the socket from the state object.
                Socket handler = (Socket)ar.AsyncState;

                // Complete sending the data to the remote device.
                int bytesSent = handler.EndSend(ar);
                Console.WriteLine("Sent {0} bytes to client.", bytesSent);

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

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