C# Socket异步通讯客户端实现源码
C# Socket异步通讯客户端之主程序:
- public static int Main(String[] args)
- {
- IPAddress ipAddress = IPAddress.Parse("192.168.1.104");
- int port = 20000;
- 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 test<EOF>");
- 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;
- // 完成连接.
- client.EndConnect(ar);
- Console.WriteLine("Socket connected to {0}",
- client.RemoteEndPoint.ToString());
- // 连接已完成,主线程继续.
- connectDone.Set();
- }
C# Socket异步通讯客户端之数据接收:
- private static void Receive(Socket client)
- {
- // 构造容器state.
- StateObject state = new StateObject();
- state.workSocket = client;
- // 从远程目标接收数据.
- client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
- new AsyncCallback(ReceiveCallback), state);
- }
- private static void ReceiveCallback(IAsyncResult ar)
- {
- // 从输入参数异步state对象中获取state和socket对象
- StateObject state = (StateObject)ar.AsyncState;
- Socket client = state.workSocket;
- //从远程设备读取数据
- int bytesRead = client.EndReceive(ar);
- if (bytesRead > 0)
- {
- // 有数据,存储.
- state.sb.Append(Encoding.ASCII.GetString(state.buffer, 0, bytesRead));
- // 继续读取.
- client.BeginReceive(state.buffer, 0, StateObject.BufferSize, 0,
- new AsyncCallback(ReceiveCallback), state);
- }
- else
- {
- // 所有数据读取完毕.
- if (state.sb.Length > 1)
- {
- response = state.sb.ToString();
- }
- // 所有数据读取完毕的指示信号.
- receiveDone.Set();
- }
- }
C# Socket异步通讯客户端之发送数据:
- private static void Send(Socket client, String data)
- {
- // 格式转换.
- byte[] byteData = Encoding.ASCII.GetBytes(data);
- // 开始发送数据到远程设备.
- client.BeginSend(byteData, 0, byteData.Length, 0,
- new AsyncCallback(SendCallback), client);
- }
- private static void SendCallback(IAsyncResult ar)
- {
- // 从state对象中获取socket
- Socket client = (Socket)ar.AsyncState;
- // 完成数据发送.
- int bytesSent = client.EndSend(ar);
- Console.WriteLine("Sent {0} bytes to server.", bytesSent);
- // 指示数据已经发送完成,主线程继续.
- sendDone.Set();
- }
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