Question

我正在开发一个项目，我需要接收从路由器发送的数据并操纵另一个应用程序的数据。我搜索了论坛，大多数我发现有关客户端/服务器应用程序的讨论，然后主要讨论服务器。我只需要一个客户端解决方案。我无法控制服务器端。我可以在HEX中接收数据，如下所示，或者我可以使用XML与路由器（服务器）进行通信。连接是通过TCP连接的，但路由器发送的数据格式为

    <STX>02 c6 36 FF<ETX>

我似乎能够建立连接，但我没有从路由器接收任何数据。这是我到目前为止所拥有的。我相信我的问题可能是路由器没有发送响应。我真正需要做的是建立一个连接，只是听取任何活动。然后当我收到STX开始存储数据并在ETX操作之后。我甚至没有对数据做任何事情。现在我只想在控制台中显示收到的数据。非常感谢任何帮助。

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 = 1234;

// 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 = IPAddress.Parse("192.168.0.234");
        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, "<STX>This is a test<ETX>");
        sendDone.WaitOne();

        for (int i = 0; i < 1000; i++)
        {
            // Receive the response from the remote device.
            Receive(client);

            Console.WriteLine("receive done");
            receiveDone.WaitOne();

            // Write the response to the console.
            Console.WriteLine("Response received : {0}", response);
            //Console.ReadLine();
            Console.WriteLine(i.ToString());
        }
        Console.WriteLine("done");
        Console.ReadLine();
        // 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;
}
}

简单的c＃tcp客户端连接

0 个答案: