如何在 C# 中获取用户的公共 IP 地址
本文关键字：IP 地址 用户 获取 | 更新日期: 2023-09-27 18:34:51
我想要使用我的网站的客户端的公共IP地址。下面的代码显示了局域网中的本地IP，但我想要客户端的公共IP。
//get mac address
NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
String sMacAddress = string.Empty;
foreach (NetworkInterface adapter in nics)
{
if (sMacAddress == String.Empty)// only return MAC Address from first card
{
IPInterfaceProperties properties = adapter.GetIPProperties();
sMacAddress = adapter.GetPhysicalAddress().ToString();
}
}
// To Get IP Address
string IPHost = Dns.GetHostName();
string IP = Dns.GetHostByName(IPHost).AddressList[0].ToString();
输出：
IP 地址 ： 192.168.1.7
请帮我获取公共 IP 地址。
这是我
使用的：
protected void GetUser_IP()
{
string VisitorsIPAddr = string.Empty;
if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
{
VisitorsIPAddr = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}
else if (HttpContext.Current.Request.UserHostAddress.Length != 0)
{
VisitorsIPAddr = HttpContext.Current.Request.UserHostAddress;
}
uip.Text = "Your IP is: " + VisitorsIPAddr;
}
"uip"是 ASPX 页中显示用户 IP 的标签的名称。
您可以使用"HTTP_X_FORWARDED_FOR"或"REMOTE_ADDR"标头属性。
参考方法 GetVisitorIPAddress 来自机器语法博客。
/// <summary>
/// method to get Client ip address
/// </summary>
/// <param name="GetLan"> set to true if want to get local(LAN) Connected ip address</param>
/// <returns></returns>
public static string GetVisitorIPAddress(bool GetLan = false)
{
string visitorIPAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (String.IsNullOrEmpty(visitorIPAddress))
visitorIPAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
if (string.IsNullOrEmpty(visitorIPAddress))
visitorIPAddress = HttpContext.Current.Request.UserHostAddress;
if (string.IsNullOrEmpty(visitorIPAddress) || visitorIPAddress.Trim() == "::1")
{
GetLan = true;
visitorIPAddress = string.Empty;
}
if (GetLan && string.IsNullOrEmpty(visitorIPAddress))
{
//This is for Local(LAN) Connected ID Address
string stringHostName = Dns.GetHostName();
//Get Ip Host Entry
IPHostEntry ipHostEntries = Dns.GetHostEntry(stringHostName);
//Get Ip Address From The Ip Host Entry Address List
IPAddress[] arrIpAddress = ipHostEntries.AddressList;
try
{
visitorIPAddress = arrIpAddress[arrIpAddress.Length - 2].ToString();
}
catch
{
try
{
visitorIPAddress = arrIpAddress[0].ToString();
}
catch
{
try
{
arrIpAddress = Dns.GetHostAddresses(stringHostName);
visitorIPAddress = arrIpAddress[0].ToString();
}
catch
{
visitorIPAddress = "127.0.0.1";
}
}
}
}
return visitorIPAddress;
}
所有这些
建议的组合，以及它们背后的原因。您也可以随意添加更多测试用例。如果获取客户端IP是最重要的，那么您可能希望获得所有这些内容，然后进行一些比较，结果可能更准确。
简单检查此线程中的所有建议以及我自己的一些代码......
using System.IO;
using System.Net;
public string GetUserIP()
{
string strIP = String.Empty;
HttpRequest httpReq = HttpContext.Current.Request;
//test for non-standard proxy server designations of client's IP
if (httpReq.ServerVariables["HTTP_CLIENT_IP"] != null)
{
strIP = httpReq.ServerVariables["HTTP_CLIENT_IP"].ToString();
}
else if (httpReq.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
{
strIP = httpReq.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}
//test for host address reported by the server
else if
(
//if exists
(httpReq.UserHostAddress.Length != 0)
&&
//and if not localhost IPV6 or localhost name
((httpReq.UserHostAddress != "::1") || (httpReq.UserHostAddress != "localhost"))
)
{
strIP = httpReq.UserHostAddress;
}
//finally, if all else fails, get the IP from a web scrape of another server
else
{
WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
using (WebResponse response = request.GetResponse())
using (StreamReader sr = new StreamReader(response.GetResponseStream()))
{
strIP = sr.ReadToEnd();
}
//scrape ip from the html
int i1 = strIP.IndexOf("Address: ") + 9;
int i2 = strIP.LastIndexOf("</body>");
strIP = strIP.Substring(i1, i2 - i1);
}
return strIP;
}
该代码为您提供服务器的IP地址，而不是访问您网站的客户端的地址。 将 HttpContext.Current.Request.UserHostAddress 属性用于客户端的 IP 地址。
用于 Web
应用程序(ASP.NET MVC 和 WebForm(
/// <summary>
/// Get current user ip address.
/// </summary>
/// <returns>The IP Address</returns>
public static string GetUserIPAddress()
{
var context = System.Web.HttpContext.Current;
string ip = String.Empty;
if (context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
ip = context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
else if (!String.IsNullOrWhiteSpace(context.Request.UserHostAddress))
ip = context.Request.UserHostAddress;
if (ip == "::1")
ip = "127.0.0.1";
return ip;
}
对于Windows应用程序(Windows窗体，控制台，Windows服务，...(
static void Main(string[] args)
{
HTTPGet req = new HTTPGet();
req.Request("http://checkip.dyndns.org");
string[] a = req.ResponseBody.Split(':');
string a2 = a[1].Substring(1);
string[] a3=a2.Split('<');
string a4 = a3[0];
Console.WriteLine(a4);
Console.ReadLine();
}
这些代码片段中的许多都非常大，可能会使寻求帮助的新程序员感到困惑。
这个简单而紧凑的代码来获取访问者的IP地址怎么样？
string ip = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(ip))
{
ip = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
简单、简短、紧凑。
我有一个扩展方法：
public static string GetIp(this HttpContextBase context)
{
if (context == null || context.Request == null)
return string.Empty;
return context.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]
?? context.Request.UserHostAddress;
}
注意："HTTP_X_FORWARDED_FOR"表示代理后面的 ip。 上下文。Request.UserHostAddress 与"REMOTE_ADDR"相同。
但请记住，实际的IP并不一定。
来源：
IIS 服务器变量
链接
我的版本同时处理 ASP.NET 或局域网 IP：
/**
* Get visitor's ip address.
*/
public static string GetVisitorIp() {
string ip = null;
if (HttpContext.Current != null) { // ASP.NET
ip = string.IsNullOrEmpty(HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"])
? HttpContext.Current.Request.UserHostAddress
: HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
}
if (string.IsNullOrEmpty(ip) || ip.Trim() == "::1") { // still can't decide or is LAN
var lan = Dns.GetHostEntry(Dns.GetHostName()).AddressList.FirstOrDefault(r => r.AddressFamily == AddressFamily.InterNetwork);
ip = lan == null ? string.Empty : lan.ToString();
}
return ip;
}
private string GetClientIpaddress()
{
string ipAddress = string.Empty;
ipAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (ipAddress == "" || ipAddress == null)
{
ipAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
return ipAddress;
}
else
{
return ipAddress;
}
}
在 MVC 5 上，您可以使用以下内容：
string cIpAddress = Request.UserHostAddress; //Gets the client ip address
或
string cIpAddress = Request.ServerVariables["REMOTE_ADDR"]; //Gets the client ip address
在MVC中，IP可以通过以下代码获得
string ipAddress = Request.ServerVariables["REMOTE_ADDR"];
string IP = HttpContext.Current.Request.Params["HTTP_CLIENT_IP"] ?? HttpContext.Current.Request.UserHostAddress;
就用这个......
public string GetIP()
{
string externalIP = "";
externalIP = (new WebClient()).DownloadString("http://checkip.dyndns.org/");
externalIP = (new Regex(@"'d{1,3}'.'d{1,3}'.'d{1,3}'.'d{1,3}")).Matches(externalIP)[0].ToString();
return externalIP;
}
我们连接到为我们提供外部 IP 地址的服务器，并尝试从返回的 HTML 页面中解析 IP。但是，当服务器对这些页面进行小的更改或删除它们时，这些方法将停止正常工作。
这是一种使用已经存活多年的服务器获取外部 IP 地址并快速返回简单响应的方法......https://www.codeproject.com/Tips/452024/Getting-the-External-IP-Address
Private string getExternalIp()
{
try
{
string externalIP;
externalIP = (new
WebClient()).DownloadString("http://checkip.dyndns.org/");
externalIP = (new Regex(@"'d{1,3}'.'d{1,3}'.'d{1,3}'.'d{1,3}"))
.Matches(externalIP)[0].ToString();
return externalIP;
}
catch { return null; }
}
VB.NET
Imports System.Net
Private Function GetExternalIp() As String
Try
Dim ExternalIP As String
ExternalIP = (New WebClient()).DownloadString("http://checkip.dyndns.org/")
ExternalIP = (New Regex("'d{1,3}'.'d{1,3}'.'d{1,3}'.'d{1,3}")) _
.Matches(ExternalIP)(0).ToString()
Return ExternalIP
Catch
Return Nothing
End Try
结束功能
lblmessage.Text =Request.ServerVariables["REMOTE_HOST"].ToString();
您可以在以下位置下载 xNet： https://drive.google.com/open?id=1fmUosINo8hnDWY6s4IV4rDnHKLizX-Hq
首先，您需要导入xNet，代码：
using xNet;
法典：
void LoadpublicIP()
{
HttpRequest httprequest = new HttpRequest();
String HTML5 = httprequest.Get("https://whoer.net/").ToString();
MatchCollection collect = Regex.Matches(HTML5, @"<strong data-clipboard-target="".your-ip(.*?)</strong>", RegexOptions.Singleline);
foreach (Match match in collect)
{
var val = Regex.Matches(match.Value, @"(?<ip>('d|'.)+)");
foreach (Match m in val)
{
richTextBox1.Text = m.Groups[2].Value;
}
}
}