MVC 4捕获所有路线从未到达

Question

当尝试在MVC 4中创建捕获所有路由时(我发现了几个示例,基于我的代码),它返回404错误.我在IIS 7.5上运行它.这似乎是一个直接的解决方案,所以我错过了什么？

需要注意的是,如果我将"CatchAll"路线移到"默认"路线上方,它就可以工作.但是当然没有其他控制器到达过.

这是代码:

Route.Config:

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );

        routes.MapRoute(
            "CatchAll",
            "{*dynamicRoute}",
            new { controller = "CatchAll", action = "ChoosePage" }
        );

控制器:

public class CatchAllController : Controller
{

    public ActionResult ChoosePage(string dynamicRoute)
    {
        ViewBag.Path = dynamicRoute;
        return View();
    }

}

Answer 1

由于创建捕获路线的最终目标是能够处理动态网址,而我无法找到上述原始问题的直接答案,因此我从不同的角度研究了我的研究.在这样做时,我遇到了这篇博文:当没有路由匹配时自定义404

此解决方案允许处理给定URL中的多个部分(即www.mysite.com/this/is/a/dynamic/route)

这是最终的自定义控制器代码:

public override IController CreateController(System.Web.Routing.RequestContext requestContext, string controllerName)
 {
     if (requestContext == null)
     {
         throw new ArgumentNullException("requestContext");
     }

     if (String.IsNullOrEmpty(controllerName))
     {
         throw new ArgumentException("MissingControllerName");
     }

     var controllerType = GetControllerType(requestContext, controllerName);

     // This is where a 404 is normally returned
     // Replaced with route to catchall controller
     if (controllerType == null)
     {
        // Build the dynamic route variable with all segments
        var dynamicRoute = string.Join("/", requestContext.RouteData.Values.Values);

        // Route to the Catchall controller
        controllerName = "CatchAll";
        controllerType = GetControllerType(requestContext, controllerName);
        requestContext.RouteData.Values["Controller"] = controllerName;
        requestContext.RouteData.Values["action"] = "ChoosePage";
        requestContext.RouteData.Values["dynamicRoute"] = dynamicRoute;
     }

     IController controller = GetControllerInstance(requestContext, controllerType);
     return controller;
 }