MVC 6中的HtmlHelpers

Question

我正在嘗試將此代碼移植到mvc 6，可以得到任何幫助，代碼可以編譯，但該方法在我對@Html.IsActive視圖中不可用。

using Microsoft.AspNet.Mvc.Rendering;

namespace Blah.Web.Helpers
{
    public static class HtmlHelpers
    {

        public static string IsActive(this HtmlHelper htmlHelper, string controller, string action)
        {
            var routeData = htmlHelper.ViewContext.RouteData;

            var routeAction = routeData.Values["action"].ToString();
            var routeController = routeData.Values["controller"].ToString();

            var returnActive = (controller == routeController && action == routeAction);

            return returnActive ? "active" : "";
        }

    }
}

在視圖中，我引用了命名空間：

@using Blah.Web.Helpers;

Answer 1

在方法簽名中， HtmlHelper應該是IHtmlHelper

請參閱下面的示例

namespace Blah.Web.Helpers
{
    public static class HtmlHelpers
    {
        public static string IsActive(this IHtmlHelper htmlHelper, string controller, string action)
        {
            var routeData = htmlHelper.ViewContext.RouteData;

            var routeAction = routeData.Values["action"].ToString();
            var routeController = routeData.Values["controller"].ToString();

            return (controller == routeController && action == routeAction) ? "active" : "";
        }
    }
}