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UPDClient类,服务端发送消息,客户端接受不到信息

0
悬赏园豆：50 [待解决问题]
消息发送端 
using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class Client
{

    private static IPAddress GroupAddress = IPAddress.Parse("224.168.100.2");
    private static int GroupPort = 3000;

    private static void Send(String message)
    {
        UdpClient sender = new UdpClient();
        IPEndPoint groupEP = new IPEndPoint(GroupAddress, GroupPort);

        try
        {
            Console.WriteLine("Input Sending   datagram   :");
            message=  Console.ReadLine();

            byte[] bytes = Encoding.ASCII.GetBytes(message);

            sender.Send(bytes, bytes.Length, groupEP);
            sender.Close();
            Console.ReadLine();
        }
        catch (Exception e)
        {
            Console.WriteLine(e.ToString());
        }

    }

    public static int Main(String[] args)
    {
        Send("ceshi");

        return 0;
    }
}

 

消息接受端 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets; 
namespace Custom
{
    public class Custom
    {
        private static readonly IPAddress GroupAddress = IPAddress.Parse("224.168.100.2");
        private const int GroupPort = 3000;
        private static void StartListener()
        {

            bool done = false;

            UdpClient listener = new UdpClient();
            IPEndPoint groupEP = new IPEndPoint(GroupAddress, GroupPort);

            try
            {

                //listener.EnableBroadcast = true;
                listener.JoinMulticastGroup(GroupAddress);
                listener.Connect(groupEP);

                while (!done)
                {
                    Console.WriteLine("Waiting   for   broadcast");
                    byte[] bytes = listener.Receive(ref   groupEP);
                    

                    Console.WriteLine("Received   broadcast   from   {0}   :\n   {1}\n",
                        groupEP.ToString(),
                        Encoding.ASCII.GetString(bytes, 0, bytes.Length));
                }

                listener.Close();
                Console.ReadLine();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }

        }

        public static int Main(String[] args)
        {
            StartListener();

            return 0;
        }   

    }
}


不知道怎么回事,在消息发送端,发送消息,消息接收端,就是没反应,很是郁闷,请大侠们看看.谢谢..

翱翔NET的主页 翱翔NET | 初学一级 | 园豆：35
提问于：2012-05-07 21:54
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所有回答(2)
0

发送的时候，可能也要先加入的广播组中

sinhbv | 园豆：2579 (老鸟四级) | 2012-05-08 08:24
0
接收端代码改为 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.Net.Sockets; 
namespace Custom
{
    public class Custom
    {
        private static readonly IPAddress GroupAddress = IPAddress.Parse("224.168.100.2");
        private const int GroupPort = 3000;
        private static void StartListener()
        {

            bool done = false;

            UdpClient listener = new UdpClient(GroupPort );
            IPEndPoint groupEP = new IPEndPoint(GroupAddress, GroupPort);

            try
            {

                listener.JoinMulticastGroup(GroupAddress);


                while (!done)
                {
                    Console.WriteLine("Waiting   for   broadcast");
                    byte[] bytes = listener.Receive(ref   groupEP);
                    

                    Console.WriteLine("Received   broadcast   from   {0}   :\n   {1}\n",
                        groupEP.ToString(),
                        Encoding.ASCII.GetString(bytes, 0, bytes.Length));
                }

                listener.Close();
                Console.ReadLine();
            }
            catch (Exception e)
            {
                Console.WriteLine(e.ToString());
            }

        }

        public static int Main(String[] args)
        {
            StartListener();

            return 0;
        }   

    }
}

 

自己解决了,组播发送的时候,接收端不能使用udpclient的Connect方法

翱翔NET | 园豆：35 (初学一级) | 2012-05-08 10:40
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