Visual Studio 接收以太网 UDP (C#)

Question

我正在尝试通过以太网（从控制器）接收 UDP 数据并遇到了一些问题。我知道控制器正在发送数据，因为我可以在wireshark 上看到它通过，但我尝试过的所有事情都没有奏效。下面的代码是我发现能够接收我想要的数据的最接近的代码。 更多信息：控制器IP和端口是192.168.82.27:1743，我端接收IP和端口是192.168.82.21:1740

    public class UDPListener
    {
        static UdpClient client = new UdpClient(1740);
        public static void Main()
        {
            try
            {
                client.BeginReceive(new AsyncCallback(recv), null);
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }
            while (true)
            {

            }
        }
        //CallBack
        private static void recv(IAsyncResult res)
        {
            IPEndPoint RemoteIpEndPoint = new IPEndPoint(IPAddress.Any, 1743);
            byte[] received = client.EndReceive(res, ref RemoteIpEndPoint);
            //Process code
            Console.WriteLine(RemoteIpEndPoint + "  :  " + Encoding.ASCII.GetString(received));
            client.BeginReceive(new AsyncCallback(recv), null);
        } 
    }

Answer 1

这段代码应该可以工作：

public class Receiver
{
    private readonly UdpClient udp;
    private IPEndPoint ip = new IPEndPoint(IPAddress.Any, 1740);
    public Receiver()
    {
        udp = new UdpClient
        {
            ExclusiveAddressUse = false
        };
        udp.Client.SetSocketOption(SocketOptionLevel.Socket, SocketOptionName.ReuseAddress, true);
        udp.Client.Bind(ip);
    }
    public void StartListening()
    {
        udp.BeginReceive(Receive, new object());
    }
    private void Receive(IAsyncResult ar)
    {
        var bytes = udp.EndReceive(ar, ref ip);
        StartListening();
    }
}