How can I get the IP address from the user client in C#?

Question

I'm using this code that I found in Get public IP using DynDNS and WebRequest C#

to get the IP address. But I just get the IP Address from the server and what I need is the IP address from the user that is connected to my web application.

String direction = "";
WebRequest request = WebRequest.Create("http://checkip.dyndns.org/");
using (WebResponse response = request.GetResponse())
using (StreamReader stream = new StreamReader(response.GetResponseStream()))
{
    direction = stream.ReadToEnd();
}

//Search for the ip in the html
int first = direction.IndexOf("Address: ") + 9;
int last = direction.LastIndexOf("</body>");
direction = direction.Substring(first, last - first);

What kind of code is this? If it's an ASP.NET application, then the client's IP address is already available in `Request.UserHostAddress` — John Saunders, Jun 01 '12 at 14:41
This code will give you the public IP of the computer **running** the code, the code I've given below will give you the IP of the computer **requesting** your asp.net page. — Nate, Jun 01 '12 at 14:43

score 2 · Accepted Answer · answered Jun 01 '12 at 14:42

2

If you are running a web app, and you want your "client's" IP, you need to use the UserHostAddress.

var userAddress = HttpContext.Current.Request.UserHostAddress;

answered Jun 01 '12 at 14:42

Nate

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score 0 · Answer 2 · edited Feb 12 '13 at 06:17

0

First obtain a context:

HttpListenerContext ctx = m_HttpListener.GetContext();

After accepting the requset, client information is availble in ctx. Use ctx to get client IP addresss:

string IP = ctx.Request.RemoteEndPoint.Address.ToString();

edited Feb 12 '13 at 06:17

andr

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answered Feb 12 '13 at 05:58

mahesh

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How can I get the IP address from the user client in C#?

2 Answers2