[SOLVED] MVC controller is being called twice

MVC controller is being called twice

I have a controller that is being called twice from an ActionLink call.

My home page has a link, that when clicked calls the Index method on the Play controller. An id of 100 is passed into the method. I think this is what is causing the issue. More on this below.

Here are some code snippets:

Home page:

<%= Html.ActionLink("Click Me", "Index", "Play", new { id = 100 }, null) %>

Play Controller:

public ActionResult Index(int? id)
{
    var settings = new Dictionary<string, string>();
    settings.Add("Id", id.ToString());
    ViewData["InitParams"] = settings.ToInitParams();
    return View();
}

Play view:

<%@ Page Title="" Language="C#" Inherits="System.Web.Mvc.ViewPage" %>

(html <head> omitted for brevity)

<body>
    <form id="form1" runat="server" style="height:100%">
        Hello
    </form>
</body>

If I get rid of the parameter to the Index method, everything is fine. If I leave the parameter in place, then the Index method is called with 100 as the id. After returning the View, the method is called a second time with a parameter of null.

I can’t seem to figure out what is triggering the second call.

My first thought was to add a specific route like this:

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

This had no effect other than making a prettier looking link.

I am not sure where to go from here.

Solution

Is there any other markup that could be accidentally referencing the page? Script references, image references, css references, all could be mistakenly pointed at '.' or the current page.