C#获取IPv4代码

using System;

using System.Collections.Generic;

using System.Collections.Specialized;

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 GetIPv4Application

{

    public partial class Form1 : Form

    {

        public Form1()

        {

            InitializeComponent();

        }

        private void btn_getIPv4_Click(object sender, EventArgs e)

        {

            ShowIP();

        }

        void ShowIP()

        {

            richTextBoxIPv4.Text = string.Empty;

            //ipv4地址也可能不止一个

            foreach (string ip in GetLocalIpv4())

            {

                this.richTextBoxIPv4.AppendText(ip.ToString()+"\n");

            }

            return;

        }

        string[] GetLocalIpv4()

        {

            //事先不知道ip的个数，数组长度未知，因此用StringCollection储存

            IPAddress[] localIPs;

            localIPs = Dns.GetHostAddresses(Dns.GetHostName());

            StringCollection IpCollection = new StringCollection();

            foreach (IPAddress ip in localIPs)

            {

                //根据AddressFamily判断是否为ipv4,如果是InterNetWorkV6则为ipv6

                if (ip.AddressFamily == AddressFamily.InterNetwork)

                    IpCollection.Add(ip.ToString());

            }

            string[] IpArray = new string[IpCollection.Count];

            IpCollection.CopyTo(IpArray, 0);

            return IpArray;

        }

    }

}

　　

注：当有虚拟网卡时会获取到多个ip地址。