How to Get User IP address using c#

Question

2.52/5 (4 votes)

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i need to get user ipaddress....i use below code

C#

private string GetIP()
    {
        string strHostName = "";
        strHostName = System.Net.Dns.GetHostName();

        IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);

        IPAddress[] addr = ipEntry.AddressList;

        return addr[addr.Length - 1].ToString();

    }

it worked in local site...But after publish my site it returns ipaddress in the below format:
"2001:0:4137:9e76:3c60:3e18:935c:505"
i don't know my mistake.. How can i get ipaddress...
if anyone know my mistake explain me..

Thanks n advance..

Posted 6-Jun-12 20:04pm

Muthu Vinoth Kumar

Updated 21-May-20 8:18am

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Comments

Tien Nhat 14-Nov-15 7:35am

thanks

ritzshaani 31-Mar-16 6:35am

Actually, I am trying to know IP address of PC which is behind a PUBLIC IP , the .NET code returns the IP address of server instead of client. Can you help me to know any method in ASp.net to know the actual IP ,e.g.10.183....?

4 solutions

Solution 1

Use

C#

using System;
using System.Net;

public class IPNetworking
{
  public static string GetIP4Address()
  {
    string IP4Address = String.Empty;

    foreach (IPAddress IPA in Dns.GetHostAddresses(Request.ServerVariables["REMOTE_ADDR"].ToString())))
    {
      if (IPA.AddressFamily.ToString() == "InterNetwork")
      {
        IP4Address = IPA.ToString();
        break;
      }
    }

    if (IP4Address != String.Empty)
    {
      return IP4Address;
    }

    foreach (IPAddress IPA in Dns.GetHostAddresses(Dns.GetHostName()))
    {
      if (IPA.AddressFamily.ToString() == "InterNetwork")
      {
        IP4Address = IPA.ToString();
        break;
      }
    }

    return IP4Address;
  }
}

Posted 6-Jun-12 20:17pm

uspatel

Updated 6-Jun-12 20:56pm

v3

Comments

Muthu Vinoth Kumar 7-Jun-12 2:23am

it return 127.0.0.1

uspatel 7-Jun-12 2:24am

What is your IP?

Muthu Vinoth Kumar 7-Jun-12 2:26am

191.186.1.52

uspatel 7-Jun-12 2:39am

try updated answer

Muthu Vinoth Kumar 7-Jun-12 2:31am

second foreach coding return my ip correctly...
whats differece b/w first foreach and second foreach

uspatel 7-Jun-12 2:38am

Perhaps,it is due to running on localhost?

Muthu Vinoth Kumar 7-Jun-12 2:44am

Error occured..
An object reference is required for the nonstatic field, method, or property 'System.Web.UI.Page.Request.get

How to rectify?

uspatel 7-Jun-12 2:49am

use this
this.Request.ServerVariables["REMOTE_ADDR"].ToString()

Muthu Vinoth Kumar 7-Jun-12 2:52am

CS0026: Keyword 'this' is not valid in a static property, static method, or static field initializer

uspatel 7-Jun-12 2:55am

make method non static and then use

uspatel 7-Jun-12 2:57am

check updated answer

Muthu Vinoth Kumar 7-Jun-12 3:14am

it returns 127.0.0.1

uspatel 7-Jun-12 3:15am

run it on iis,it returns right ip

Muthu Vinoth Kumar 7-Jun-12 3:29am

i need to run on online..whether it works?

uspatel 7-Jun-12 3:30am

Yes,It works.....

Muthu Vinoth Kumar 7-Jun-12 4:40am

thanks

Mas11 19-Mar-13 7:32am

Nice Code ! worked for me :)

Priyanka Sundaraj 26-Jun-14 8:03am

Thanks a Lot for this code

Solution 2

hi,
try this, it will return your IP Address

C#

string ip = "";
string strHostName = "";
strHostName = System.Net.Dns.GetHostName();

IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);

IPAddress[] addr = ipEntry.AddressList;

ip = addr[2].ToString();

Posted 6-Jun-12 20:37pm

tanweer

Comments

Nijel Sabra 22-Mar-13 2:38am

Hi coder,

Dns.GetHostEntry(strHostName); will returns 1) AddressList 2)Aliases and 3)HostName
and Here which "IPAddress[] addr = ipEntry.AddressList" is taken, but that IPAddress[] contains only two index position ,there will araise IndexOutofRangeException
So plz use this
ip = addr[2].ToString(); or
ip = addr[addr.Length-1].ToString();

Thanks,
Nijel

Solution 5

C#

private string GetIP()
    {
        string strHostName = "";
        strHostName = System.Net.Dns.GetHostName();

        IPHostEntry ipEntry = System.Net.Dns.GetHostEntry(strHostName);

        string ipaddress =convert.tostring(ipEntry.AddressList[2]);

        return ipaddress.tostring();

    }

Posted 23-Jan-14 21:57pm

joginder-banger

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Ravi Shankar K · Accepted Answer · 2013-03-13T21:02:00

Here is the solution to get all valid IP4 Address list

C#

public static IEnumerable<string> GetAddresses()
{
     var host = Dns.GetHostEntry(Dns.GetHostName());
     return (from ip in host.AddressList where ip.AddressFamily == AddressFamily.InterNetwork select ip.ToString()).ToList();
}
</string>

on the above solution AddressFamily.InterNetwork filters the IP4 address from AddressFamily.

If you want your system valid IP address, I personally suggest below solution

C#

public static IPAddress GetIPAddress(string hostName)
{
    Ping ping = new Ping();
    var replay = ping.Send(hostName);

    if (replay.Status == IPStatus.Success)
    {
        return replay.Address;
    }
    return null;
 }

public static void Main()
{
    Console.WriteLine("Local IP Address: " + GetIPAddress(Dns.GetHostName()));
    Console.WriteLine("Google IP:" + GetIPAddress("google.com");
    Console.ReadLine();
}

How to Get User IP address using c#

4 solutions

Solution 3

Solution 1

Solution 2

Solution 5

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