如何使用ViewContext?

How to use ViewContext?

我在 asp.net MVC 应用程序中有布局页面,此页面包含一个导航栏

 <ul class="sidenavbar">
   <li><a   style="font-size:large">ASP.NET Tutorial</a></li>
   <li>@Html.ActionLink("Home","Home")</li>
   <li>@Html.ActionLink("Introduction", "Introduction")</li>
   <li>@Html.ActionLink("Getting Started", "GettingStarted")</li>
 </ul>

看到我的 navbar 中的每个项目都有 actionmethod 现在我想应用 css class active to currently selected list item 怎么实现这使用 ViewContext 或者是否有更好的方法?

这可能有效

<ul class="nav navbar-nav">
  <li class="@(ViewContext.RouteData.Values["controller"].ToString() == "Home" ? "active" : "")">@Html.ActionLink("Home", "Index", "Home")</li>
  <li class="@(ViewContext.RouteData.Values["controller"].ToString() == "About" ? "active" : "")">@Html.ActionLink("About", "About", "Home")</li>
  <li class="@(ViewContext.RouteData.Values["controller"].ToString() == "Contact" ? "active" : "")">@Html.ActionLink("Contact", "Contact", "Home")</li>
</ul>