一、路由规则：
routes.MapRoute(
                name: "Default1",
                url: "more_{root}_{plate}.html",
                defaults: new { controller = "about", action = "Index", root = UrlParameter.Optional, plate = UrlParameter.Optional }
            );

二、定义URL：
<a href="@Url.Action("index", "about", new { root = 1, plate = 2 })">123456</a>

三、在VIew获取参数：
<p>root: @(Url.RequestContext.RouteData.Values["root"])</p>
<p>plate: @(Url.RequestContext.RouteData.Values["plate"]) </p>