截至2021年9月- ASP。NET Core (5.x) MVC项目允许我在我的控制器中以这种方式获取IP地址:

Request.HttpContext.Connection.RemoteIpAddress

现在似乎比过去简单多了。

API已经更新。不知道它什么时候改变了，但根据达米安·爱德华兹在12月底的说法，你现在可以这样做:

var remoteIpAddress = request.HttpContext.Connection.RemoteIpAddress;

也可以从外部服务获取IP。

public string GetIP()
{
    HttpClient client = new HttpClient();
    var result = client.GetStringAsync("https://jsonip.com/").Result;
    var ip = JsonSerializer.Deserialize<RemoteIPDto>(result.ToString()).IP;
    return ip;
}

RemoteIPDto类在哪里

public class RemoteIPDto
{
    [JsonPropertyName("ip")]
    public string IP { get; set; }
    [JsonPropertyName("geo-ip")]
    public string GeoIp { get; set; }
    [JsonPropertyName("API Help")]
    public string ApiHelp { get; set; }
}

在我的情况下，我用docker和nginx作为反向代理在DigitalOcean上运行DotNet Core 2.2 Web应用程序。使用Startup.cs中的这段代码，我可以获得客户端IP

app.UseForwardedHeaders(new ForwardedHeadersOptions
        {
            ForwardedHeaders = ForwardedHeaders.All,
            RequireHeaderSymmetry = false,
            ForwardLimit = null,
            KnownNetworks = { new IPNetwork(IPAddress.Parse("::ffff:172.17.0.1"), 104) }
        });

::ffff:172.17.0.1是我在使用之前获得的ip

Request.HttpContext.Connection.RemoteIpAddress.ToString();

第一次添加

Microsoft.AspNetCore.Http
services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

在Startup.cs中的ConfigureServices中 然后在控制器中添加以下代码

   private IHttpContextAccessor _accessor;
    
  public LoginController(IHttpContextAccessor accessor)
            {
              _accessor = accessor;
            }

  public IEnumerable<string> Get()
        {
         var ip = _accessor.HttpContext?.Connection?.RemoteIpAddress?.ToString();
         return new string[] { ip, "value" };
        }

希望这对你有用

using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Http.Features;

public string GetClientIPAddress(HttpContext context)
    {
        string ip = string.Empty;
if (!string.IsNullOrEmpty(context.Request.Headers["X-Forwarded-For"]))
        {
            ip = context.Request.Headers["X-Forwarded-For"];
        }
        else
        {
            ip = context.Request.HttpContext.Features.Get<IHttpConnectionFeature>().RemoteIpAddress.ToString();
        }
        return ip;
    }

你想获取Ip地址;

GetClientIPAddress(HttpContext);