网络主机名与IP

一、通过网址获取IP

上一个GroupBox 的ID为：groupBox1；下一个为：groupBox2

TextBox的ID为： domainName；ListBox 的ID为：ip

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;

namespace WindowsApplication12
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            ip.Items.Clear();
            try
            {
                string ipAddress = domainName.Text.ToString();
                IPAddress[] hostinfo = Dns.GetHostAddresses(ipAddress);
                for (int i = 0; i < hostinfo.Length; i++)
                {
                    ip.Items.Add(hostinfo[i]);
                }
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message, "提示");
            }

        }

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

    }
}

二、通过IP获取域名

上一个GroupBox 的ID为：groupBox1；下一个为：groupBox2

TextBox的ID为： ip；ListBox 的ID为：domainName

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Net;

namespace WindowsApplication12
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {

            domainName.Items.Clear();
            try
            {
                IPAddress ipAddress = IPAddress.Parse(ip.Text);
                IPHostEntry hostinfo = Dns.GetHostEntry(ipAddress);
                string[] alias = hostinfo.Aliases;
                domainName.Items.Add(hostinfo.HostName);
                for (int i = 0; i < alias.Length; i++)
                {
                    domainName.Items.Add(alias[i]);
                }
            }
            catch (Exception exc)
            {
                MessageBox.Show(exc.Message, "提示");
            }

        }

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

    }
}