Add Constraint for URL Routing

Example 1: http://localhost/About

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

 

Example 2: http://localhost/Contact?page=1

RouteTable.Routes.GetVirtualPathForArea(
   Request.RequestContext,
   new RouteValueDictionary(
      new { page = 1 }
   )
).VirtualPath;

 

Example 3:

In View:

@(ViewContext.RouteData.Values[“action”]);

@(ViewContext.RouteData.Values[“controller”]);

@(ViewContext.RouteData.Values[“id”]);

 

In Controller:

var currentAction = RouteData.Values[“action”];

var currentController = RouteData.Values[“controller”];

object currentArea;

RouteData.DataTokens.TryGetValue(“area”, out currentArea);

 

Additional Note:

1. A tool to show which route has been used, RouteDebugger

2. Turn off RouteDebugger after installed by changing RouteDebugger:Enabled to false in Web.config