MARKUS

using Newtonsoft.Json;

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net;

using System.Net.NetworkInformation;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

namespace DnsCheckTest

{

    /// <summary>

    /// MainWindow.xaml에 대한 상호 작용 논리

    /// </summary>

    public partial class MainWindow : Window

    {

        public MainWindow()

        {

            InitializeComponent();

            DnsCheckOld();

            DnsCheck();

        }

        private void Button_Click(object sender, RoutedEventArgs e)

        {

            DnsCheckOld();

            DnsCheck();

        }

        private void DnsCheck()

        { 

            var host = CommonLib.DNSHelper.GetHostEntryTask();

            StringBuilder builder = new StringBuilder();

            builder.AppendLine($"hostName : {host.HostName}");

            builder.AppendLine("");

            builder.AppendLine(" - Aliases");

            foreach (var item in host.Aliases)

            {

                builder.AppendLine($"  {item}");

            }

            builder.AppendLine("");

            builder.AppendLine(" - Address List");

            foreach (var item in host.AddressList)

            {

                builder.AppendLine($"  {item.AddressFamily.ToString()} : {item.ToString()}");

            }

            txtHostInfo.Text = builder.ToString();

        }

        private void DnsCheckOld()

        {

            var ipaddress = GetDnsAdress();

            StringBuilder builder = new StringBuilder();

            var host = Dns.GetHostEntry(ipaddress);

            builder.AppendLine($"hostName : {host.HostName}");

            builder.AppendLine("");

            builder.AppendLine(" - Aliases");

            foreach (var item in host.Aliases)

            {

                builder.AppendLine($"  {item}");

            }

            builder.AppendLine("");

            builder.AppendLine(" - Address List");

            foreach (var item in host.AddressList)

            {

                builder.AppendLine($"  {item.AddressFamily.ToString()} : {item.ToString()}");

            }

            txtHostInfoOld.Text = builder.ToString();

        }

        public static IPAddress GetDnsAdress()

        {

            NetworkInterface[] networkInterfaces = NetworkInterface.GetAllNetworkInterfaces();

            foreach (NetworkInterface networkInterface in networkInterfaces)

            {

                if (networkInterface.OperationalStatus == OperationalStatus.Up)

                {

                    IPInterfaceProperties ipProperties = networkInterface.GetIPProperties();

                    IPAddressCollection dnsAddresses = ipProperties.DnsAddresses;

                    foreach (IPAddress dnsAdress in dnsAddresses)

                    {

                        return dnsAdress;

                    }

                }

            }

            return null;

        }

    }

}