How to detect static ip using win app in c#

Please correct me if i am wrong. There are two types of IP - One, the static(fixed) IP address we assign to the LAN card and second that we received from the service provider.

For ex. The IP address set for my machine is 192.168.1.10 while the IP address given by ISP is 218.64.xx.xx. (You can check this using http://www.ip2location.com/)

When I use ASP.net, i can get the IP address provided by ISP using - HttpContext.Current.Request.UserHostAddress;

The Problem: Now, I am working in Windows Forms environment but unable to get the IP provided by ISP, though I am able to get the fixed IP.

Can anybody help me?

Thanks for sharing your time.

标签： c# winforms ip-address

5条回答

Rolldiameter

2楼-- · 2019-07-31 02:13

i found manu methods one of them is a html request to http://whatismyip.com

public static IPAddress GetExternalIp()
            {
                string whatIsMyIp = "http://whatismyip.com";
                string getIpRegex = @"(?<=<TITLE>.*)\d*\.\d*\.\d*\.\d*(?=</TITLE>)";
                WebClient wc = new WebClient();
                UTF8Encoding utf8 = new UTF8Encoding();
                string requestHtml = "";
                try
                {
                    requestHtml = utf8.GetString(wc.DownloadData(whatIsMyIp));
                }
                catch (WebException we)
                {
                    // do something with exception
                    Console.Write(we.ToString());
                }
                Regex r = new Regex(getIpRegex);
                Match m = r.Match(requestHtml);
                IPAddress externalIp = null;
                if (m.Success)
                {
                    externalIp = IPAddress.Parse(m.Value);
                }
                return externalIp;
            }

or use

IPHostEntry IPHost = Dns.GetHostEntry(Dns.GetHostName());
Console.Write(IPHost.AddressList[0].ToString());

0人赞添加讨论(0) 举报

可以哭但决不认输i

3楼-- · 2019-07-31 02:17

You're trying to get the external IP address of your router.

You need to send an HTTP request to a third-party service which will reply with the IP address.

You can do that using the WebClient class.

For example:

///<summary>Gets the computer's external IP address from the internet.</summary>
static IPAddress GetExternalAddress() {
    //<html><head><title>Current IP Check</title></head><body>Current IP Address: 129.98.193.226</body></html>
    var html = new WebClient().DownloadString("http://checkip.dyndns.com/");

    var ipStart = html.IndexOf(": ", StringComparison.OrdinalIgnoreCase) + 2;
    return IPAddress.Parse(html.Substring(ipStart, html.IndexOf("</", ipStart, StringComparison.OrdinalIgnoreCase) - ipStart));
}

0人赞添加讨论(0) 举报

贪生不怕死

4楼-- · 2019-07-31 02:19

try with this (using System.Net):

IPHostEntry he = Dns.GetHostByName(Dns.GetHostName());
var s = he.AddressList[0].ToString(); // returns IP address

0人赞添加讨论(0) 举报

一夜七次

5楼-- · 2019-07-31 02:21

The terminology is wrong; your machine has a private IP and a public IP (not "static" and "dynamic").

To get the public IP, you need to bounce off a public server, e.g., whatismyip.org or your own server.

0人赞添加讨论(0) 举报

女痞

6楼-- · 2019-07-31 02:27

you can try this in the System.Net namespace:

Dns.GetHostAddresses(Dns.GetHostName())

0人赞添加讨论(0) 举报

How to detect static ip using win app in c#

采纳回答

编辑标签

举报内容

检举类型

检举原因

检举说明(必填)

打开微信“扫一扫”，打开网页后点击屏幕右上角分享按钮

付费偷看金额在0.1-10元之间