Call method from URL (GET)

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Hello!
At view i have link: http://localhost:54149/Users/Delete/13
And controller:

SQL

public ActionResult Delete(int Idaccesso)
        {

            if (Idaccesso != null && Idaccesso != 0)
            {

}
}

This controller returns error:
The parameters dictionary contains a null entry for parameter 'Idaccesso' of non-nullable type 'System.Int32' for method 'System.Web.Mvc.ActionResult Delete(Int32)' in 'CMSPI.Controllers.UsersController'. An optional parameter must be a reference type, a nullable type, or be declared as an optional parameter.
Parameter name: parameters 

If it replace on:
<pre lang="sql">public ActionResult Delete(int Idaccesso = 0)
        {

            if (Idaccesso != null && Idaccesso != 0)
            {

}
}

Than only keep Idaccesso = 0, because Idaccesso set by default.
How will be?

Posted 11-Apr-13 3:44am

Junoli

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Shmuel Zang · Answer 1 · 2013-04-11T04:11:00

What's the MapRoute of your MvcApplication? Does it defined like this?

C#

public class MvcApplication : HttpApplication
{
    // ...

    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

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

    }

    //...

}

Try to change the parameter's name from Idaccesso to id.