如何在C#中使用Win App检测静态IP [英] How to detect static ip using win app in c#
问题描述
如果我错了，请纠正我. IP有两种类型- 第一，我们分配给LAN卡的静态(固定)IP地址，第二，我们从服务提供商那里收到的地址.
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.
例如我的机器设置的IP地址为192.168.1.10，而ISP提供的IP地址为218.64.xx.xx. (您可以使用 http://www.ip2location.com/进行检查)
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/)
当我使用ASP.net时，我可以使用-获得ISP提供的IP地址. HttpContext.Current.Request.UserHostAddress;
When I use ASP.net, i can get the IP address provided by ISP using - HttpContext.Current.Request.UserHostAddress;
问题: 现在，我正在Windows Forms环境中工作，但是虽然能够获得固定IP，但是却无法获得ISP提供的IP.
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.
有人可以帮助我吗?
感谢分享您的时间.
推荐答案
您正在尝试获取路由器的外部IP地址.
You're trying to get the external IP address of your router.
您需要将HTTP请求发送到第三方服务，该服务将使用IP地址进行回复.
You need to send an HTTP request to a third-party service which will reply with the IP address.
您可以使用WebClient类来做到这一点.
You can do that using the WebClient class.
例如:
///<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));
}
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