C#获取本机IP，排除IPV6，仅获取IPV4的方法--转载

 1 using System;
 2 using System.Text;
 3 using System.Windows.Forms;
 4 using System.Net;
 5 using System.Net.Sockets;
 6 using System.Collections.Specialized;
 7 
 8 namespace GetIpv4Test
 9 {
10     public partial class Form1 : Form
11     {
12         public Form1()
13         {
14             InitializeComponent();
15             ShowIP();
16         }
17         void ShowIP()
18         {
19             //ipv4地址也可能不止一个
20             foreach (string ip in GetLocalIpv4())
21             {
22                 this.richTextBoxIPv4.AppendText(ip.ToString());
23             }
24             return;
25         }
26         string[] GetLocalIpv4()
27         {
28             //事先不知道ip的个数，数组长度未知，因此用StringCollection储存
29             IPAddress[] localIPs;
30             localIPs = Dns.GetHostAddresses(Dns.GetHostName());
31             StringCollection IpCollection = new StringCollection();
32             foreach (IPAddress ip in localIPs)
33             {
34                 //根据AddressFamily判断是否为ipv4,如果是InterNetWorkV6则为ipv6
35                 if (ip.AddressFamily == AddressFamily.InterNetwork)
36                     IpCollection.Add(ip.ToString());
37             }
38             string[] IpArray = new string[IpCollection.Count];
39             IpCollection.CopyTo(IpArray, 0);
40             return IpArray;
41         }
42     }
43 }