通过UDP的组播方式收发数据

客户端代码

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

using System.Net;

using System.Net.Sockets;

using System.Text;

 

namespace UDPTest

{

    public partial class Form1 : Form

    {

        private UdpClient udpSend;

        public Form1()

        {

            InitializeComponent();

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

            udpSend = new UdpClient();

            udpSend.EnableBroadcast = true;//是否可以发送和接收广播

            IPEndPoint iep = new IPEndPoint(IPAddress.Parse("224.100.0.10"), 8001);

            byte[] data = Encoding.UTF8.GetBytes(richTextBox1.Text);

            udpSend.Send(data, data.Length, iep);

            richTextBox1.Clear();

        }

    }

}

服务端代码

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using System;

using System.Collections.Generic;

using System.ComponentModel;

using System.Data;

using System.Drawing;

using System.Linq;

using System.Text;

using System.Windows.Forms;

 

using System.Net;

using System.Net.Sockets;

 

namespace UDPTest2

{

    public partial class Form1 : Form

    {

         

        UdpClient udpReceive;

 

        public Form1()

        {

            InitializeComponent();

        }

 

        private void button1_Click(object sender, EventArgs e)

        {

 

        }

 

        private void Form1_Load(object sender, EventArgs e)

        {

            byte[] data = null;

            udpReceive = new UdpClient(8001);

            udpReceive.JoinMulticastGroup(IPAddress.Parse("224.100.0.10"), 50);//添加到多路广播组，50为路由器跳数

            IPEndPoint iep = new IPEndPoint(IPAddress.Any, 0);

            while (true)

            {

                data = udpReceive.Receive(ref iep);

                string str = Encoding.UTF8.GetString(data, 0, data.Length);

                MessageBox.Show(iep.ToString() + ":" + str);

            }

        }

    }

}