Getting full URL of action in ASP NET MVC

Question

Is there a built-in way of getting the full URL of an action   I am looking for something like GetFullUrl  Action    Controller   that would return something like http   www fred com Controller Action   The reason I am looking for this is to avoid hardcoding URLs in automated emails that are generated so that the URLs can always be generated relative to the current location of the site

User · Accepted Answer

There is an overload of Url Action that takes your desired protocol  e g  http  https  as an argument - if you specify this  you get a fully qualified URL   Here s an example that uses the protocol of the current request in an action method   var fullUrl   this Url Action  Edit    Posts   new   id   5    this Request Url Scheme     HtmlHelper   Html  also has an overload of the ActionLink method that you can use in razor to create an anchor element  but it also requires the hostName and fragment parameters  So I d just opt to use  Url Action again    lt span gt    Copy    lt a href   Url Action  About    Home   null  Request Url Scheme   gt this link lt  a gt     and post it anywhere on the internet   lt  span gt

User · Answer

This may be just me being really  really picky  but I like to only define constants once  If you use any of the approaches defined above  your action constant will be defines multiple times   To avoid this  you can do the following       public class Url               public string LocalUrl   get             public Url string localUrl                        LocalUrl   localUrl                     public override string ToString                         return LocalUrl                       public abstract class Controller               public Url RootAction   gt  new Url GetUrl              protected abstract string Root   get             public Url BuildAction string actionName                        var localUrl   GetUrl           actionName              return new Url localUrl                      private string GetUrl                         if  Root                                      return                                return       Root                     public override string ToString                         return GetUrl                      Then create your controllers  say for example the DataController       public static readonly DataController Data   new DataController        public class DataController   Controller               public const string DogAction    dog           public const string CatAction    cat           public const string TurtleAction    turtle            protected override string Root   gt   data            public Url Dog   gt  BuildAction DogAction           public Url Cat   gt  BuildAction CatAction           public Url Turtle   gt  BuildAction TurtleAction           Then just use it like          GET  Data Cat      ActionName ControllerRoutes DataController CatAction       public ActionResult Etisys                 return View            And from your  cshtml  or any code    lt ul gt       lt li gt  lt a href   ControllerRoutes Data Dog  gt Dog lt  a gt  lt  li gt       lt li gt  lt a href   ControllerRoutes Data Cat  gt Cat lt  a gt  lt  li gt   lt  ul gt    This is definitely a lot more work  but I rest easy knowing compile time validation is on my side

User · Answer

This what you need to do    Url Action action controller  null  Request Url Scheme

User · Answer

This question is specific to ASP  NET however I am sure some of you will benefit of system agnostic javascript which is beneficial in many situations   UPDATE  The way to get url formed outside of the page itself is well described in answers above    Or you could do a oneliner like following   new UrlHelper actionExecutingContext RequestContext  Action       SessionTimeout    Home        new  area   string Empty        actionExecutingContext Request Url   null       actionExecutingContext Request Url Scheme    http       from filter or   new UrlHelper this Request RequestContext  Action       Details         Journey        new   area   productType         this Request Url   null  this Request Url Scheme    http       However quite often one needs to get the url of current page  for those cases using Html Action and putting he name and controller of page you are in to me feels awkward  My preference in such cases is to use JavaScript instead  This is especially good in systems that are half re-written MVT half web-forms half vb-script half God knows what - and to get URL of current page one needs to use different method every time   One way is to use JavaScript to get URL is window location href another - document URL

User · Answer

I was having an issue with this  my server was running behind a load balancer  The load balancer was terminating the SSL TLS connection  It then passed the request to the web servers using http    Using the Url Action   method with Request Url Schema  it kept creating a http url  in my case to create a link in an automated email  which my PenTester didn t like    I may have cheated a little  but it is exactly what I needed to force a https url    lt a href   Url Action  Action    Controller   new   id   Model Id     https    gt Click Here lt  a gt    I actually use a web config AppSetting so I can use http when debugging locally  but all test and prod environments use transformation to set the https value

User · Answer

As Paddy mentioned  if you use an overload of UrlHelper Action   that explicitly specifies the protocol to use  the generated URL will be absolute and fully qualified instead of being relative   I wrote a blog post called How to build absolute action URLs using the UrlHelper class in which I suggest to write a custom extension method for the sake of readability        lt summary gt      Generates a fully qualified URL to an action method by using     the specified action name  controller name and route values       lt  summary gt       lt param name  url  gt The URL helper  lt  param gt       lt param name  actionName  gt The name of the action method  lt  param gt       lt param name  controllerName  gt The name of the controller  lt  param gt       lt param name  routeValues  gt The route values  lt  param gt       lt returns gt The absolute URL  lt  returns gt  public static string AbsoluteAction this UrlHelper url      string actionName  string controllerName  object routeValues   null        string scheme   url RequestContext HttpContext Request Url Scheme       return url Action actionName  controllerName  routeValues  scheme       You can then simply use it like that in your view    Url AbsoluteAction  Action    Controller

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