How to get a user's client IP address in ASP.NET?

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We have Request.UserHostAddress to get the IP address in ASP.NET, but this is usually the user\'s ISP\'s IP address, not exactly the user\'s machine IP address

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19条回答

青春惊慌失措

2020-11-22 01:01

Hello guys Most of the codes you will find will return you server ip address not client ip address .however this code returns correct client ip address.Give it a try. For More info just check this

https://www.youtube.com/watch?v=Nkf37DsxYjI

for getting your local ip address using javascript you can use put this code inside your script tag

<script>
    var RTCPeerConnection = /*window.RTCPeerConnection ||*/
     window.webkitRTCPeerConnection || window.mozRTCPeerConnection;

         if (RTCPeerConnection) (function () {
             var rtc = new RTCPeerConnection({ iceServers: [] });
             if (1 || window.mozRTCPeerConnection) {      
                 rtc.createDataChannel('', { reliable: false });
             };

             rtc.onicecandidate = function (evt) {

                 if (evt.candidate)
                     grepSDP("a=" + evt.candidate.candidate);
             };
             rtc.createOffer(function (offerDesc) {
                 grepSDP(offerDesc.sdp);
                 rtc.setLocalDescription(offerDesc);
             }, function (e) { console.warn("offer failed", e); });


             var addrs = Object.create(null);
             addrs["0.0.0.0"] = false;
             function updateDisplay(newAddr) {
                 if (newAddr in addrs) return;
                 else addrs[newAddr] = true;
                 var displayAddrs = Object.keys(addrs).filter(function
(k) { return addrs[k]; });
                 document.getElementById('list').textContent =
displayAddrs.join(" or perhaps ") || "n/a";
             }

             function grepSDP(sdp) {
                 var hosts = [];
                 sdp.split('\r\n').forEach(function (line) { 
                     if (~line.indexOf("a=candidate")) {   
                         var parts = line.split(' '),   
                             addr = parts[4],
                             type = parts[7];
                         if (type === 'host') updateDisplay(addr);
                     } else if (~line.indexOf("c=")) {      
                         var parts = line.split(' '),
                             addr = parts[2];
                         updateDisplay(addr);
                     }
                 });
             }
         })(); else
         {
             document.getElementById('list').innerHTML = "<code>ifconfig| grep inet | grep -v inet6 | cut -d\" \" -f2 | tail -n1</code>";
             document.getElementById('list').nextSibling.textContent = "In Chrome and Firefox your IP should display automatically, by the power of WebRTCskull.";

         }




</script>
<body>
<div id="list"></div>
</body>

and For getting your public ip address you can use put this code inside your script tag

  function getIP(json) {
    document.write("My public IP address is: ", json.ip);
  }


<script type="application/javascript" src="https://api.ipify.org?format=jsonp&callback=getIP"></script>

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暖寄归人

2020-11-22 01:02

You can use:

System.Net.Dns.GetHostEntry(System.Net.Dns.GetHostName()).AddressList.GetValue(0).ToString();

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闹比i

2020-11-22 01:02

public static class Utility
{
    public static string GetClientIP(this System.Web.UI.Page page)
    {
        string _ipList = page.Request.Headers["CF-CONNECTING-IP"].ToString();
        if (!string.IsNullOrWhiteSpace(_ipList))
        {
            return _ipList.Split(',')[0].Trim();
        }
        else
        {
            _ipList = page.Request.ServerVariables["HTTP_X_CLUSTER_CLIENT_IP"];
            if (!string.IsNullOrWhiteSpace(_ipList))
            {
                return _ipList.Split(',')[0].Trim();
            }
            else
            {
                _ipList = page.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                if (!string.IsNullOrWhiteSpace(_ipList))
                {
                    return _ipList.Split(',')[0].Trim();
                }
                else
                {
                    return page.Request.ServerVariables["REMOTE_ADDR"].ToString().Trim();
                }
            }
        }
    }
}

Use;

string _ip = this.GetClientIP();

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日久生厌

2020-11-22 01:03

Try:

using System.Net;

public static string GetIpAddress()  // Get IP Address
{
    string ip = "";     
    IPHostEntry ipEntry = Dns.GetHostEntry(GetCompCode());
    IPAddress[] addr = ipEntry.AddressList;
    ip = addr[2].ToString();
    return ip;
}
public static string GetCompCode()  // Get Computer Name
{   
    string strHostName = "";
    strHostName = Dns.GetHostName();
    return strHostName;
}

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清酒与你

2020-11-22 01:04

IP addresses are part of the Network layer in the "seven-layer stack". The Network layer can do whatever it wants to do with the IP address. That's what happens with a proxy server, NAT, relay, or whatever.

The Application layer should not depend on the IP address in any way. In particular, an IP Address is not meant to be an identifier of anything other than the idenfitier of one end of a network connection. As soon as a connection is closed, you should expect the IP address (of the same user) to change.

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旧巷少年郎

2020-11-22 01:05

Combining the answers from @Tony and @mangokun, I have created the following extension method:

public static class RequestExtensions
{
    public static string GetIPAddress(this HttpRequest Request)
    {
        if (Request.Headers["CF-CONNECTING-IP"] != null) return Request.Headers["CF-CONNECTING-IP"].ToString();

        if (Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
        {
            string ipAddress = Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

            if (!string.IsNullOrEmpty(ipAddress))
            {
                string[] addresses = ipAddress.Split(',');
                if (addresses.Length != 0)
                {
                    return addresses[0];
                }
            }
        }

        return Request.UserHostAddress;
    }
}

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