如何在ASP.NET MVC中找到动作的绝对URL？

using System.Web.Mvc;

public class HomeController : Controller
{
    public ActionResult Index()
    {
        // 获取UrlHelper实例
        UrlHelper urlHelper = new UrlHelper(Request.RequestContext);

        // 使用UrlHelper的Action方法生成动作的绝对URL
        string absoluteUrl = urlHelper.Action("About", "Home", routeValues: null, protocol: Request.Url.Scheme);

        // 使用生成的绝对URL
        ViewBag.AbsoluteUrl = absoluteUrl;

        return View();
    }

    public ActionResult About()
    {
        return View();
    }
}

<p>The absolute URL for the About action is: @ViewBag.AbsoluteUrl</p>

The absolute URL for the About action is: https://example.com/Home/About