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   源码介绍

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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 WakeUpOnLan
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string mac = textBox1.Text;
            mac = mac.ToUpper();
            mac = mac.Replace(" ", "");
            string[] mac_strs = mac.Split('-');

            if (mac_strs.Length != 6)
            {
                label2.ForeColor = Color.Red;
                label2.Text = "无效的mac地址. mac地址格式:00-1E-C9-41-35-CD";
                return;
            }

            byte[] mac_bytes = new byte[6];
            for (int i = 0; i < mac_strs.Length; i  )
            {
                mac_bytes[i] = byte.Parse(mac_strs[i], System.Globalization.NumberStyles.HexNumber);
            }

            
            const int kMagicPacketLen = 102;
            byte[] magic_packet = new byte[kMagicPacketLen];

            byte[] header = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
            Array.Copy(header, magic_packet, 6);

            for (int i = 0; i < 16; i  )
            {
                Array.Copy(mac_bytes, 0, magic_packet, 6   i * 6, 6);
            }

            IPAddress ip = IPAddress.Parse("255.255.255.255");
            if (textBox2.Text.Length != 0)
            {
                try
                {
                    ip = IPAddress.Parse(textBox2.Text);
                }
                catch
                {
                    ip = IPAddress.Parse("255.255.255.255");
                }
            }
            IPEndPoint end_point = new IPEndPoint(ip, 80);
            UdpClient udpClient = new UdpClient();
            udpClient.EnableBroadcast = true;
            int sent_bytes = udpClient.Send(magic_packet, kMagicPacketLen, end_point);
            if (sent_bytes == kMagicPacketLen)
            {
                label2.ForeColor = Color.Green;
                label2.Text = "发送广播UDP网络包成功！";
            }
            else
            {
                label2.ForeColor = Color.Red;
                label2.Text = "发送广播UDP网络包失败！";
            }
        }

        private void textBox1_TextChanged(object sender, EventArgs e)
        {
            label2.Text = "";
        }

        private void textBox2_TextChanged(object sender, EventArgs e)
        {
            label2.Text = "";
        }
    }
}