《C# Socket异步通讯实现详解》.doc

using System; using System.Net; using System.Net.Sockets; using System.Threading; using System.Text; // State object for receiving data from remote device. 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(); } 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 .IPHostEntry ipHostInfo = Dns.Resolve();IPAddress ipAddress = ipHostInfo.AddressList[0];IPEndPoint remoteEP = new IPEndPoint(ipAddress, port);? //?生成一个TCP/IP?socket. ? Socket?client?=?new?Socket(AddressFamily.InterNetwork, ? SocketType.Stream,?ProtocolType.Tcp); ? ? //?与目标终端连接. ? client.BeginConnect(remoteEP, ? new?AsyncCallback(ConnectCallback),?client); ? //等待，直到连接程序完成。在ConnectCallback中适当位置有connecDone.Set()语句 ? connectDone.WaitOne(); ? ? //?发送数据到远程终端. ? Send(client,?This?is?a?testEOF); ? sendDone.WaitOne(); ? ? //?接收返回数据. ? 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(); ? return?0; ? }? C# Socket异步通讯客户端之连接部分Callback: private?static?void?ConnectCallback(IAsyncResult?ar) ? { ? ? //?从state对象获取socket. ? Socket?client?=?(Socket)ar.AsyncState; ? ? /