UdpClient

Socket实现Udp的发送和接收

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _1Socket实现udp的发送
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        Socket soc;
        //打开
        private void button1_Click(object sender, EventArgs e)
        {
            soc = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
            soc.Bind(new IPEndPoint(IPAddress.Parse("192.168.107.14"), 3030));

            Task.Run(() =>
            {
                while (true)
                {
                    byte[] buffer = new byte[1024];
                    EndPoint ip = new IPEndPoint(IPAddress.None, 0);// 初始化远程终端，没ip ，没端口
                    soc.ReceiveFrom(buffer, 0, ref ip); //接收了消息，获取远程终端
                    IPEndPoint ip1 = ip as IPEndPoint; //EndPoint的ip类型 转成IPEndPoint类型
                    BeginInvoke( new Action(() =>
                    {
                        richTextBox1.AppendText($"接收到了来自{ip1.ToString()}的消息:{Encoding.UTF8.GetString(buffer)}\r\n");
                    }));

                }
            });
        }
        //关闭
        private void button2_Click(object sender, EventArgs e)
        {
            soc.Close();
        }
        //发送
        private void button3_Click(object sender, EventArgs e)
        {
            soc.SendTo(Encoding.UTF8.GetBytes("9福星还有一个大铲子输了"), new IPEndPoint(IPAddress.Parse("192.168.107.46"), 3000));
        }

        private void richTextBox1_TextChanged(object sender, EventArgs e)
        {

        }
    }
}

UdpClient

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace _2UDPClient
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        UdpClient udp;

        private void button1_Click(object sender, EventArgs e)
        {
            udp = new UdpClient(new IPEndPoint(IPAddress.Parse("192.168.107.14"), 3000));

            Task.Run(() =>
            {
                try
                {

                    while (true)
                    {
                        IPEndPoint ip = null;
                        byte[] bs = udp.Receive(ref ip);//接收数据 传递远程终端
                        string s = Encoding.UTF8.GetString(bs);
                        BeginInvoke(new Action(() =>
                        {
                            richTextBox1.AppendText(ip.ToString() + ":" + s + "\r\n");
                        }));
                    }

                }
                catch (Exception ex)
                {

                    MessageBox.Show("UDP已经关闭");
                }
            });
        }

        private void button2_Click(object sender, EventArgs e)
        {
            udp.Close();
        }

        private void button3_Click(object sender, EventArgs e)
        {
            byte[] bs = Encoding.UTF8.GetBytes("今天又周五了，明天可以休息了");
            udp.Send(bs,bs.Length,"192.168.107.210",8000);
        }
    }
}