How to Get client ip address in .net core 2.x

To get client IP address in Asp.net core 2.x, you have to inject HttpContextAccessor 

Declare private variable in class

   private IHttpContextAccessor _accessor;

Initialize above private variable in default constructor and retrieve IP address as showed in following code

public class HomeController : Controller
    {
        private readonly IUserRepository userRepository;
        private IHttpContextAccessor _accessor;

        public HomeController(IUserRepository userRepository,
        IHttpContextAccessor accessor)
        {
            this.userRepository = userRepository;
            this._accessor = accessor;
        }
        public IActionResult Index()
        {
   ViewBag.IpAddress = 
_accessor.HttpContext.Connection.RemoteIpAddress.ToString();
   return View();
        }
    }

Make sure you initialize IHTTPContextAccessor in startup.cs

services.TryAddSingleton<ihttpcontextaccessor httpcontextaccessor="">();
</ihttpcontextaccessor>

If you don't register IHTTPContextAccessor .net core will give you following error

 InvalidOperationException: Unable to resolve service for type 'Microsoft.AspNetCore.Http.IHttpContextAccessor' while attempting to activate

.net core get host ip address

Get Client ip address in .net core 2.0