Asp Net Web API 2.1 get client IP address

With Web API 2.2: Request.GetOwinContext().Request.RemoteIpAddress

If you're self-hosting with Asp.Net 2.1 using the OWIN Self-host NuGet package you can use the following code:

 private string getClientIp(HttpRequestMessage request = null)
    {
        if (request == null)
        {
            return null;
        }

        if (request.Properties.ContainsKey("MS_OwinContext"))
        {
            return ((OwinContext) request.Properties["MS_OwinContext"]).Request.RemoteIpAddress;
        }
        return null;
    }

Try to get the Ip using

ip = HttpContext.Current != null ? HttpContext.Current.Request.UserHostAddress : "";

Following link might help you. Here's code from the following link.

reference : getting-the-client-ip-via-asp-net-web-api

using System.Net.Http;
using System.ServiceModel.Channels;
using System.Web;
using System.Web.Http;


namespace Trikks.Controllers.Api
{
    public class IpController : ApiController
    {
          public string GetIp()
          {
                return GetClientIp();
          }

          private string GetClientIp(HttpRequestMessage request = null)
          {
                request = request ?? Request;

                if (request.Properties.ContainsKey("MS_HttpContext"))
                {
                      return   ((HttpContextWrapper)request.Properties["MS_HttpContext"]).Request.UserHostAddress;
                }
                else if (request.Properties.ContainsKey(RemoteEndpointMessageProperty.Name))
                {
                     RemoteEndpointMessageProperty prop = (RemoteEndpointMessageProperty)request.Properties[RemoteEndpointMessageProperty.Name];
                     return prop.Address;
                }
                else if (HttpContext.Current != null)
                {
                    return HttpContext.Current.Request.UserHostAddress;
                }
                else
                {
                      return null;
                }
           }
     }
}

Another way of doing this is below.

reference: how-to-access-the-client-s-ip-address

For web hosted version

string clientAddress = HttpContext.Current.Request.UserHostAddress;

For self hosted

object property;
        Request.Properties.TryGetValue(typeof(RemoteEndpointMessageProperty).FullName, out property);
        RemoteEndpointMessageProperty remoteProperty = property as RemoteEndpointMessageProperty;