How to specify controller in ActionLink html helper in C#

Question

I have a web application developed in ASP.NET MVC3 with C# and Razor.

I would like to call a specific Action Method of a specific Controller by using the ActionLink HTML helper. I know that the second parameter of ActionLink specifies the Action Method to be called from the Default route, which is the only one in my Global.asax file:

routes.MapRoute(
            "Default", // Route name
            "{controller}/{action}/{id}", // URL with parameters
            new { controller = "Index", action = "Index", id = UrlParameter.Optional } // Parameter defaults
        );

I would like to call the Download Action Method from the Home Controller instead of Index. This does not work:

@Html.ActionLink("Presentation", "Download", "Home", new { topicId = topic.TopicId } )

It requires as third parameter a type Object but I cannot find on the web any example.

What are the steps needed in order to call a specific Controller/ActionMethod? Shall I create another route in my Global.asas file?

Thanks

Soe Moe · Accepted Answer · 2011-07-27 10:37:31Z

22

Try this one:

@Html.ActionLink("Download", "Download", new { controller = "Home",  Id = topic.TopicId });

The third parameter, object: routeValues, is used as dictionary in Asp.net MVC. Phil Haacked blogged about the decision for using object as route values.

update:
Your overload function is not working because you are calling this method. String is also object. So, you are passing "Home" as routeValues and new { topicId = topic.Id} as htmlAttributes. :)

edited Jul 27, 2011 at 10:37

answered Jul 27, 2011 at 10:12

Soe Moe

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3 Comments

CiccioMiami Over a year ago

thanks for your answer. Is it something new in MVC3? In MVC2 I remember it worked as what I attempeted to do (the overload in my question)

Soe Moe Over a year ago

AFAIK, it should be the same in MVC2. :)

Kellen Stuart Over a year ago

Doesn't seem to work if there is an action in the current controller with the same name

Bob Vale · Accepted Answer · 2011-07-27 10:04:07Z

0

Is this the overload you require? You will need the 5th parameter for html attributes.

@Html.ActionLink("Presentation", "Download", "Home", new { topicId = topic.TopicId }, new { name="Download" )

answered Jul 27, 2011 at 10:04

Bob Vale

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2 Comments

CiccioMiami Over a year ago

thanks for your answer. Whay shall I use html attributes? Your overload will just specify an HTML name attribute with the "download" value( <a name="download", ...>. Besides being useful for binding I do not see the reason to use that

Bob Vale Over a year ago

Because that was this the overload that supported specifying all the parameters you wanted. You may just be able to use null as the final parameter but I wasn't certain so I just put null. Failing that give it an empty dictionary.

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