在这里我正在使用。 我认为这实际上是由VS中的MVC项目模板生成的：

public static bool IsCurrentAction(this HtmlHelper helper, string actionName, string controllerName) { string currentControllerName = (string)helper.ViewContext.RouteData.Values["controller"]; string currentActionName = (string)helper.ViewContext.RouteData.Values["action"]; if (currentControllerName.Equals(controllerName, StringComparison.CurrentCultureIgnoreCase) && currentActionName.Equals(actionName, StringComparison.CurrentCultureIgnoreCase)) return true; return false; } 

我目前的解决方案是使用扩展方法：

 public static class UrlHelperExtensions { /// 
 /// Determines if the current view equals the specified action /// 
 /// The type of the controller. /// Url Helper /// The action to check. ///  /// true if the specified action is the current view; otherwise, false. ///  public static bool IsAction(this UrlHelper helper, LambdaExpression action) where TController : Controller { MethodCallExpression call = action.Body as MethodCallExpression; if (call == null) { throw new ArgumentException("Expression must be a method call", "action"); } return (call.Method.Name.Equals(helper.ViewContext.ViewName, StringComparison.OrdinalIgnoreCase) && typeof(TController) == helper.ViewContext.Controller.GetType()); } /// 
 /// Determines if the current view equals the specified action /// 
 /// Url Helper /// Name of the action. ///  /// true if the specified action is the current view; otherwise, false. ///  public static bool IsAction(this UrlHelper helper, string actionName) { if (String.IsNullOrEmpty(actionName)) { throw new ArgumentException("Please specify the name of the action", "actionName"); } string controllerName = helper.ViewContext.RouteData.GetRequiredString("controller"); return IsAction(helper, actionName, controllerName); } /// 
 /// Determines if the current view equals the specified action /// 
 /// Url Helper /// Name of the action. /// Name of the controller. ///  /// true if the specified action is the current view; otherwise, false. ///  public static bool IsAction(this UrlHelper helper, string actionName, string controllerName) { if (String.IsNullOrEmpty(actionName)) { throw new ArgumentException("Please specify the name of the action", "actionName"); } if (String.IsNullOrEmpty(controllerName)) { throw new ArgumentException("Please specify the name of the controller", "controllerName"); } if (!controllerName.EndsWith("Controller", StringComparison.OrdinalIgnoreCase)) { controllerName = controllerName + "Controller"; } bool isOnView = helper.ViewContext.ViewName.SafeEquals(actionName, StringComparison.OrdinalIgnoreCase); return isOnView && helper.ViewContext.Controller.GetType().Name.Equals(controllerName, StringComparison.OrdinalIgnoreCase); } } 

这里有点不同，使用FilterAttribute：

  [NavigationLocationFilter("Products")] public ViewResult List() { return View(); } 

…

 public class NavigationLocationFilterAttribute : ActionFilterAttribute { public string CurrentLocation { get; set; } public NavigationLocationFilterAttribute(string currentLocation) { CurrentLocation = currentLocation; } public override void OnActionExecuting(ActionExecutingContext filterContext) { var controller = (Controller)filterContext.Controller; controller.ViewData.Add("NavigationLocation", CurrentLocation); } } 

…

在视图中：

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 <%= ViewData["NavigationLocation"] %>