用netstat侦听下端口状态
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同步通信： |
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预定义结构体，同步通信没有多线程异步委托回调，所以无需预定义结构体 |
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客户端Client： |
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class Program { static void Main() { try{ int port = 2000; string host = "127.0.0.1"; IPAddress ip = IPAddress.Parse(host); IPEndPoint ipe = new IPEndPoint(ip, port);//把ip和端口转化为IPEndPoint实例 Socket c = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket Console.WriteLine("Conneting..."); c.Connect(ipe);//连接到服务器 string sendStr = "hello!This is a socket test"; byte[] bs = Encoding.ASCII.GetBytes(sendStr); Console.WriteLine("Send Message"); c.Send(bs, bs.Length, 0);//发送测试信息 string recvStr = ""; byte[] recvBytes = new byte[1024]; int bytes; bytes = c.Receive(recvBytes, recvBytes.Length, 0);//从服务器端接受返回信息 recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes); Console.WriteLine("Client Get Message:{0}", recvStr);//显示服务器返回信息 c.Close(); } catch (ArgumentNullException e){ Console.WriteLine("ArgumentNullException: {0}", e); } catch (SocketException e){ Console.WriteLine("SocketException: {0}", e); } Console.WriteLine("Press Enter to Exit"); Console.ReadLine(); } } |
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服务器端： |
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class Program { static void Main() { try{ int port = 2000; string host = "127.0.0.1"; IPAddress ip = IPAddress.Parse(host); IPEndPoint ipe = new IPEndPoint(ip, port); Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);//创建一个Socket类 s.Bind(ipe);//绑定2000端口 s.Listen(0);//开始监听 Console.WriteLine("Wait for connect"); Socket temp = s.Accept();//为新建连接创建新的Socket。 Console.WriteLine("Get a connect"); string recvStr = ""; byte[] recvBytes = new byte[1024]; int bytes; bytes = temp.Receive(recvBytes, recvBytes.Length, 0);//从客户端接受信息 recvStr += Encoding.ASCII.GetString(recvBytes, 0, bytes); Console.WriteLine("Server Get Message:{0}", recvStr);//把客户端传来的信息显示出来 string sendStr = "Ok!Client Send Message Sucessful!"; byte[] bs = Encoding.ASCII.GetBytes(sendStr); temp.Send(bs, bs.Length, 0);//返回客户端成功信息 temp.Close(); s.Close(); } catch (ArgumentNullException e){ Console.WriteLine("ArgumentNullException: {0}", e);} catch (SocketException e){ Console.WriteLine("SocketException: {0}", e);} Console.WriteLine("Press Enter to Exit"); Console.ReadLine(); } } |
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异步通信： |
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客户端Client： |
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预定义结构体，用于异步委托之间的传递。用户根据自己需要定制即可 |
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public class StateObject { // Client socket. public Socket workSocket = null; // Size of receive buffer. public const int BufferSize = 256; // Receive buffer. public byte[] buffer = new byte[BufferSize]; // Received data string. public StringBuilder sb = new StringBuilder(); } |
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正文： |
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public class AsynchronousClient { // The port number for the remote device. private const int port = 11000; // ManualResetEvent instances signal completion. private static ManualResetEvent connectDone = new ManualResetEvent(false); private static ManualResetEvent sendDone = new ManualResetEvent(false); private static ManualResetEvent receiveDone = new ManualResetEvent(false); // The response from the remote device. private static String response = String.Empty;
private static void StartClient(){ // Connect to a remote device. try{ // Establish the remote endpoint for the socket. // The name of the remote device is "host.contoso.com". IPHostEntry ipHostInfo = Dns.Resolve("host.contoso.com"); IPAddress ipAddress = ipHostInfo.AddressList[0]; IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);
// Create a TCP/IP socket. Socket client = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Connect to the remote endpoint. client.BeginConnect(remoteEP, new AsyncCallback(ConnectCallback), client); connectDone.WaitOne();
// Send test data to the remote device. Send(client, "This is a test<EOF>"); sendDone.WaitOne();
// Receive the response from the remote device. Receive(client); receiveDone.WaitOne();
// Write the response to the console. Console.WriteLine("Response received : {0}", response);
// Release the socket. client.Shutdown(SocketShutdown.Both); client.Close(); } catch (Exception e){ Console.WriteLine(e.ToString());} }
private static void ConnectCallback(IAsyncResult ar) { try{ // Retrieve the socket from the state object. Socket client = (Socket)ar.AsyncState;
// Complete the connection. client.EndConnect(ar);
Console.WriteLine("Socket connected to {0}", client.RemoteEndPoint.ToString());
// Signal that the connection has been made. connectDone.Set(); } catch (Exception e){ Console.WriteLine(e.ToString());} }
private static void Receive(Socket client) { try{ // Create the state object. StateObject state = new StateObject(); state.workSocket = client;
// Begin receiving the data from the remote device. client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state); } catch (Exception e){ Console.WriteLine(e.ToString());} }
private static void ReceiveCallback(IAsyncResult ar) { try{ // Retrieve the state object and the client socket // from the asynchronous state object. StateObject state = (StateObject)ar.AsyncState; Socket client = state.workSocket;
// Read data from the remote device. int bytesRead = client.EndReceive(ar);
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));
// Get the rest of the data. client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0, new AsyncCallback(ReceiveCallback), state); } else{ // All the data has arrived; put it in response. if (state.sb.Length > 1) { response = state.sb.ToString(); } // Signal that all bytes have been received. receiveDone.Set(); } } catch (Exception e){ Console.WriteLine(e.ToString());} }
private static void Send(Socket client, 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. client.BeginSend(byteData, 0, byteData.Length, 0, new AsyncCallback(SendCallback), client); }
private static void SendCallback(IAsyncResult ar) { try{ // Retrieve the socket from the state object. Socket client = (Socket)ar.AsyncState;
// Complete sending the data to the remote device. int bytesSent = client.EndSend(ar); Console.WriteLine("Sent {0} bytes to server.", bytesSent);
// Signal that all bytes have been sent. sendDone.Set(); } catch (Exception e){ Console.WriteLine(e.ToString());} }
public static int Main(String[] args) { StartClient(); return 0; } } |
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服务器端Server： |
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预定义结构体，用于异步委托之间的传递。同客户端的一致。不再赘述 |
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正文： |
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// State object for reading client data asynchronously public class AsynchronousSocketListener { // Thread signal. public static ManualResetEvent allDone = new ManualResetEvent(false); public AsynchronousSocketListener(){} 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()); IPHostEntry ipHostInfo = Dns.Resolve("127.0.0.1"); IPAddress ipAddress = ipHostInfo.AddressList[0]; IPEndPoint localEndPoint = new IPEndPoint(ipAddress, 11000); // 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(" Press 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); 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. Data : {1}", content.Length, content); // Echo the data back to the client. Send(handler, "Server return :" + 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()); } } public static int Main(String[] args) { StartListening(); return 0; } } |