C#通訊編程

http://topic.csdn.net/u/20080623/08/4bbd2475-45f1-42e3-a613-16b094759ade.html?75578

Socket通訊:

C# code

public class XmlSocket    {        //非同步socket診聽        // Incoming data from client.從用戶端傳來的資料        public static string data = null;        // Thread signal.線程 用一個指示是否將初始狀態設定為終止的布爾值初始化 ManualResetEvent 類的新執行個體。        public static ManualResetEvent allDone = new ManualResetEvent(false);        //static void Main(string[] args)        //{        //    StartListening();        //}        public static void StartListening()        {            // Data buffer for incoming data. 傳入資料緩衝            byte[] bytes = new Byte[1024];            // Establish the local endpoint for the socket. 建立本地連接埠            // The DNS name of the computer            // running the listener is "host.contoso.com".            IPAddress ipAddress;            String ipString = ConfigurationManager.AppSettings.Get("SocketIP");            if (ipString==null || ipString ==String.Empty)            {                IPHostEntry ipHostInfo = Dns.GetHostEntry(Dns.GetHostName());                ipAddress = ipHostInfo.AddressList[0];            }            else            {                ipAddress = IPAddress.Parse(ipString);            }            int port;            String portString = ConfigurationManager.AppSettings.Get("SocketPort");            if (portString==null || portString==String.Empty)            {                port = 11001;            }            else            {                port = int.Parse(portString);            }            IPEndPoint localEndPoint = new IPEndPoint(ipAddress, port);            // 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.綁定連接埠和資料            try            {                listener.Bind(localEndPoint);                listener.Listen(100);                while (true)                {                    // Set the event to nonsignaled state.設定無訊號狀態的事件                    allDone.Reset();                    // Start an asynchronous socket to listen for connections.重新 啟動非同步串連                    listener.BeginAccept(new AsyncCallback(AcceptCallback), listener);                    // Wait until a connection is made before continuing.等待串連建立後繼續                    allDone.WaitOne();                }            }            catch (Exception e)            {                //            }        }        public static void AcceptCallback(IAsyncResult ar)        {            try            {                // Signal the main thread to continue.接受回調方法 該方法的此節向主應用程式線程發出訊號，                //讓它繼續處理並建立與用戶端的串連                allDone.Set();                // Get the socket that handles the client request.擷取用戶端請求控制代碼                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);            }            catch (Exception e)            {                //            }        }        /// <summary>        /// 與接受回調方法一樣，讀取回調方法也是一個 AsyncCallback 委託。        /// 該方法將來自用戶端通訊端的一個或多個位元組讀入資料緩衝區，然後再次調用 BeginReceive 方法，直到用戶端發送的資料完成為止。        /// 從用戶端讀取整個訊息後，在控制台上顯示字串，並關閉處理與用戶端的已連線的服務器通訊端。        /// </summary>        /// <param name="ar">IAsyncResult 委託</param>        public static void ReadCallback(IAsyncResult ar)        {            try            {                String content = String.Empty;                // Retrieve the state object and the handler socket建立自訂的狀態物件 from the asynchronous state object.                StateObject state = (StateObject)ar.AsyncState;                Socket handler = state.workSocket;//處理的控制代碼                // Read data from the client socket. 讀出                int bytesRead = handler.EndReceive(ar);                if (bytesRead > 0)                {                    //業務代碼                    string result = DoSomeThing(...);                    String len = Encoding.UTF8.GetBytes(result).Length.ToString().PadLeft(8, '0');                    log.writeLine(len);                    Send(len + result, handler);                }            }            catch (Exception e)            {                //            }        }        private static void Send(String data, Socket handler)        {            try            {                // Convert the string data to byte data using UTF8 encoding.                byte[] byteData = Encoding.UTF8.GetBytes(data);                // Begin sending the data to the remote device.                handler.BeginSend(byteData, 0, byteData.Length, 0,                 new AsyncCallback(SendCallback), handler);            }            catch (Exception e)            {                //            }        }        /// <summary>        /// 發送        /// </summary>        /// <param name="ar"></param>        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.向遠端發送資料                int bytesSent = handler.EndSend(ar);                StateObject state = new StateObject();                state.workSocket = handler;                handler.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,new AsyncCallback(ReadCallback), state);                handler.Shutdown(SocketShutdown.Both);                handler.Close();            }            catch (Exception e)            {//            }        }        public static void StopListening()        {            allDone.Close();            log.close();        }        /// <summary>        /// 具體處理業務的方法        /// </summary>        /// <returns></returns>        private static string DoSomething(int i)        {            //具體業務代碼,返回需要返回的字串資訊        }        /// <summary>        /// 寫日誌方法        /// </summary>        /// <param name="strLog">寫入內容</param>        public static void WriteLog(string strLog)        {             //寫入日誌代碼        }    }

    /// 線程執行體,轉寄訊息         /// </summary>         /// <param name="obj">傳遞給線程執行體的使用者名稱，用以與使用者通訊 </param>         private void ThreadFunc(object obj)         {             //通過轉寄表得到目前使用者通訊端             Socket clientSkt = _transmit_tb[obj] as Socket;           //主迴圈             while (true)             {                 try                 { //接受第一個資料包。                     //由於程式邏輯結構簡單，所以在這裡對客戶機發送的第一個包內容作逐一判斷，                     //這裡的實現不夠優雅，但不失為此簡單模型的一個解決之道。                     byte[] packetBuff = new byte[_maxPacket];                     clientSkt.Receive(packetBuff);                     string _str = Encoding.Unicode.GetString(packetBuff).TrimEnd('\0');                     //如果是發給不線上好友的資訊                     if (_str.StartsWith("cmd::FriendMessage"))                     {                         string UserName = _str.Substring("cmd::FriendMessage".Length, 20).Trim();                         string MessageS = _str.Substring("cmd::FriendMessage".Length + 20, _str.Length - "cmd::FriendMessage".Length - 20);                         SaveMessage(obj as string, UserName, MessageS);                         continue;                     }                     //如果是離線請求                     if (_str.StartsWith("cmd::RequestLogout"))                     {                         _transmit_tb.Remove(obj);                         UpdateFriendList((string)obj, false, "");                       //  string svrlog = string.Format("[系統訊息]使用者 {0} 在 {1} 已斷開... 當前線上人數: {2}\r\n\r\n", obj, DateTime.Now, _transmit_tb.Count);                       //  Console.WriteLine(svrlog);                         //向所有客戶機發送系統訊息                                               //foreach (DictionaryEntry de in _transmit_tb)                         //{                         //    string _clientName = de.Key as string;                         //    Socket _clientSkt = de.Value as Socket;                         //    _clientSkt.Send(Encoding.Unicode.GetBytes(svrlog));                         //}                         Thread.CurrentThread.Abort();                     }                     //如果是請求好友名單                     if (_str.StartsWith("cmd::RequestFriendList"))                     {                         SerializeFriendList(obj, clientSkt);                                              // 將該使用者不線上時的資訊發送給使用者                         DataTable TabMessage = ReadMessage(obj as string);                         if (TabMessage != null)                         {                             foreach (DataRow myrow in TabMessage.Rows)                             {                                 if (myrow["SendUserName"].ToString() == "System::Message")                                 {                                     clientSkt.Send(Encoding.Unicode.GetBytes(myrow["Message"].ToString()));                                 }                                 else                                 {                                     clientSkt.Send(Encoding.Unicode.GetBytes("cmd::FriendMessage" + myrow["SendUserName"].ToString().PadRight(20, ' ') + myrow["Message"].ToString()));                                 }                             }                         } //這裡不需要再繼續接受後繼資料包了，跳出當前迴圈體。                         continue;                     }                     ////如果是請求好友名單                     //if (_str.StartsWith("cmd::RequestOnLineList"))                     //{                     //    byte[] onlineBuff = SerializeOnlineList();                     //    //先發送響應訊號，使用者客戶機的判斷                     //    clientSkt.Send(Encoding.Unicode.GetBytes("cmd::RequestOnLineList"));                     //    clientSkt.Send(onlineBuff);                     //    //這裡不需要再繼續接受後繼資料包了，跳出當前迴圈體。                     //    continue;                     //} //尋找使用者                     if (_str.StartsWith("Find::FindFriend"))                     {                         DataTable TabFind = TabUser.Clone();                         DataRow [] FindRow =null  ;                         string UserName = _str.Substring("Find::FindFriend".Length, _str.Length - "Find::FindFriend".Length);                         if (UserName.Equals("Find::WhoOnLine"))                         { //看誰線上                             FindRow = TabUser.Select(" ZX = 1");                         }                      else//精確尋找                         {                             FindRow = TabUser.Select("UserName = '" + UserName + "'");                         }                         foreach (DataRow myrow in FindRow)                         {                             TabFind.ImportRow(myrow);                         }                                       clientSkt.Send(Encoding.Unicode.GetBytes("Find::FindFriend"));                         IFormatter format = new BinaryFormatter();                         MemoryStream stream = new MemoryStream();                         format.Serialize(stream, TabFind);                         stream.Position = 0;                         byte[] ret = new byte[_maxPacket];                         int count = 0;                         count = stream.Read(ret, 0, _maxPacket);                         while (count >0)                         {                             clientSkt.Send(ret);                           count =  stream.Read(ret, 0, _maxPacket);                         }                         clientSkt.Send(Encoding.Unicode.GetBytes("Find::FindFriendEnd"));                          stream.Close();                         TabFind = null;                         FindRow = null; //這裡不需要再繼續接受後繼資料包了，跳出當前迴圈體。                         continue;                     } //請求添加好友                     if (_str.StartsWith("Find::AddFriendAsk"))                     {                         string UserName = _str.Substring("Find::AddFriendAsk".Length, _str.Length - "Find::AddFriendAsk".Length);                         //通過轉寄表尋找接收方的通訊端                         if (_transmit_tb.Count != 0 && _transmit_tb.ContainsKey(UserName))                         {                             Socket receiverSkt = _transmit_tb[UserName] as Socket;                             receiverSkt.Send(Encoding.Unicode.GetBytes("Find::AddFriendAsk" + obj as string));                         }                         //這裡不需要再繼續接受後繼資料包了，跳出當前迴圈體。                         continue;                     }                     //回複答應添加好友                     if (_str.StartsWith("Find::AddFriendYes"))                     {                         string UserName = _str.Substring("Find::AddFriendYes".Length, _str.Length - "Find::AddFriendYes".Length);                       //// 儲存資料                         DataTable TabmyFriend = new DataTable() ;                         //儲存該使用者                         TabmyFriend.ReadXml(MyPath + "\\UserFriend\\" +  obj as string + ".xml");                         DataRow newRow = TabmyFriend.NewRow();                         newRow["UserName"] = UserName;                         TabmyFriend.Rows.Add(newRow);                         TabmyFriend.WriteXml(MyPath + "\\UserFriend\\" + obj as string + ".xml", XmlWriteMode.WriteSchema, false);                         //儲存其好友                         TabmyFriend = new DataTable();                         TabmyFriend.ReadXml(MyPath + "\\UserFriend\\" + UserName + ".xml");                         DataRow newRow1 = TabmyFriend.NewRow();                         newRow1["UserName"] = obj as string;                         TabmyFriend.Rows.Add(newRow1);                         TabmyFriend.WriteXml(MyPath + "\\UserFriend\\" + UserName + ".xml", XmlWriteMode.WriteSchema, false);                         TabmyFriend = null;                         SerializeFriendList(obj, clientSkt);