Question

Can’t understand where the problem… My rout values is :

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

And i try to pass parameter id :

@Html.ActionLink(app.Name, "SingleAppEdit", "Admin", new { id = app.Id }, null)

To my action in Controller “Admin”:

public ActionResult SingleAppEdit(string appId)
        {
            var positions = new List<SelectListItem>
                                       {
                                           new SelectListItem() {Text = "Top", Value = "Top"},
                                           new SelectListItem() {Text = "Bottom", Value = "Bottom"},
                                           new SelectListItem() {Text = "None", Value = "None"}
                                       };
            ViewData["PositionsList"] = new SelectList(positions, "Value", "Text");


            var app = Apps.FirstOrDefault(a => a.Id == Convert.ToInt32(appId));
            return View(app);
        }

I get null in controller. Can anybody help?

Answer 1

Your method parameter name is appId. But you are trying to pass a parameter named id.

Solution : Change your parameter name to match with the method definition.

@Html.ActionLink(app.Name, "SingleAppEdit", "Admin",
                                new { appId= app.Id }, null)