passing action method parameter to ActionFilterAttribute in asp.net mvc

Question

I know that I can use the filterContext to get to it. However, this is not very flexible if the action method parameter is named differently. This should work:

[HttpGet]
[NewAuthoriseAttribute(SomeId = id)]
public ActionResult Index(int id)
{
    ...

public class NewActionFilterAttribute : ActionFilterAttribute
{   
    public int SomeId { get; set; }
    ...

but it does not (it does not even compile). Any ideas?

Answer 1

Building on the answer from @Pankaj and comments from @csetzkorn:

You pass the name of the parameter as a string then check the filterContext

public class NewAuthoriseAttribute : ActionFilterAttribute
{
    public string IdParamName { get; set; }

    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {
        if (filterContext.ActionParameters.ContainsKey(IdParamName))
        {
            var id = filterContext.ActionParameters[IdParamName] as Int32?;
        }
    }
}

[NewAuthorizeAttribute(IdParamName = "fooId")]
public ActionResult Index(int fooId)
{ ... }