1         /// <summary>
 2         /// 获取本机所有ip地址
 3         /// </summary>
 4         /// <param name="netType">"InterNetwork":ipv4地址，"InterNetworkV6":ipv6地址</param>
 5         /// <returns>ip地址集合</returns>
 6         public static List<string> GetLocalIpAddress(string netType)
 7         {
 8             string hostName = Dns.GetHostName();                    //获取主机名称
 9             IPAddress[] addresses = Dns.GetHostAddresses(hostName); //解析主机IP地址
10
11             List<string> IPList = new List<string>();
12             if (netType==string.Empty)
13             {
14                 for (int i = 0; i < addresses.Length; i++)
15                 {
16                     IPList.Add(addresses[i].ToString());
17                 }
18             }
19             else
20             {
21                 //AddressFamily.InterNetwork表示此IP为IPv4,
22                 //AddressFamily.InterNetworkV6表示此地址为IPv6类型
23                 for (int i = 0; i < addresses.Length; i++)
24                 {
25                     if (addresses[i].AddressFamily.ToString() == netType)
26                     {
27                         IPList.Add(addresses[i].ToString());
28                     }
29                 }
30             }
31             return IPList;
32         }

1     List<string> ips= GetLocalIpAddress("");//获取本地所有ip
2     List<string> ipv4_ips = GetLocalIpAddress("InterNetwork");//获取ipv4类型的ip
3     List<string> ipv6_ips = GetLocalIpAddress("InterNetworkV6");//获取ipv6类型的ip

List<string> ipv4_ips = GetLocalIpAddress("InterNetwork");

List<string> ipv4_ips = GetLocalIpAddress("InterNetwork");

 1         /// <summary>
 2         /// 获取页面html
 3         /// </summary>
 4         /// <param name="url">请求的地址</param>
 5         /// <param name="encoding">编码方式</param>
 6         /// <returns></returns>
 7         public static string HttpGetPageHtml(string url, string encoding)
 8         {
 9             string pageHtml = string.Empty;
10             try
11             {
12                 using (WebClient MyWebClient = new WebClient())
13                 {
14                     Encoding encode = Encoding.GetEncoding(encoding);
15                     MyWebClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.84 Safari/537.36");
16                     MyWebClient.Credentials = CredentialCache.DefaultCredentials;//获取或设置用于向Internet资源的请求进行身份验证的网络凭据
17                     Byte[] pageData = MyWebClient.DownloadData(url); //从指定网站下载数据
18                     pageHtml = encode.GetString(pageData);
19                 }
20             }
21             catch (Exception e)
22             {
23
24             }
25             return pageHtml;
26         }
27         /// <summary>
28         /// 从html中通过正则找到ip信息(只支持ipv4地址)
29         /// </summary>
30         /// <param name="pageHtml"></param>
31         /// <returns></returns>
32         public static string GetIPFromHtml(String pageHtml)
33         {
34             //验证ipv4地址
35             string reg = @"(?:(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))\.){3}(?:(25[0-5])|(2[0-4]\d)|((1\d{2})|([1-9]?\d)))";
36             string ip = "";
37             Match m = Regex.Match(pageHtml, reg);
38             if (m.Success)
39             {
40                 ip = m.Value;
41             }
42             return ip;
43         }

1     var t0_html = HttpGetPageHtml("https://www.ip.cn", "utf-8");
2     var t1_html = HttpGetPageHtml("http://www.ip138.com/ips138.asp", "gbk");
3     var t2_html = HttpGetPageHtml("http://www.net.cn/static/customercare/yourip.asp", "gbk");
4     var t0_ip = GetIPFromHtml(t0_html);// 111.198.29.123
5     var t1_ip = GetIPFromHtml(t1_html);// 111.198.29.123
6     var t2_ip = GetIPFromHtml(t2_html);// 111.198.29.123