Question

I am familiar with CodeIgniter so I’m not a newbie, but I sure feel like one as I move to MVC using C#/.NET. I would expect calling the below controller would properly bind the slash-delimited arguments of URL to the controller input params. Eg: I would expect http://localhost/Download/51 to give fileID=51. However, when I run this, fileID is null when controller is called. Either HttpGet needs querystring with ? and & or need to modify routes somehow to bind properly. Help, please?

[HttpGet]
    public ActionResult Download(String fileID)                
    {
    ....// http://localhost/Download/51 
    }

Answer 1

Either use id which is the default route parameter name configured in your Global.asax:

[HttpGet]
public ActionResult Download(string id)
{
    ....// http://localhost/Download/51 
}

or change your routing configuration so that fileID is used:

routes.MapRoute(
    "Default",
    "{controller}/{action}/{fileid}",
    new { controller = "Home", action = "Index", fileid = UrlParameter.Optional }
);

Also checkout the following for more details on routing.