ASP.NET MVC Ajax.BeginForm eats params of submit button clicked. Looks like bug

Question

If you are using Ajax.BeginForm() with multiple submit buttons similar to this:

// View.aspx
<% using (Ajax.BeginForm(\"Action\", \"Controller\", 
                    


        

Answer 1

I suppose this has been fixed in MVC 2 (or it was never broken). Just make sure your HTML markup validates. The following example should show it works.

Vote.aspx:

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





    



<%using (Ajax.BeginForm("Vote", "Voting", new AjaxOptions { UpdateTargetId = "message" }))
  { %>
    <%= Html.Hidden("itemId", "1")%>
    
I love ASP.NET MVC!

    
    
<%} %>

<%= TempData["message"] %>

VotingController.aspx:

using System.Web.Mvc;

namespace Examples.FormWithMultipleSubmitButtons.Controllers
{
    public class VotingController : Controller
    {
        public ViewResult Vote()
        {
            return View();
        }

        [HttpPost]
        public ActionResult Vote(int itemId, string voteValue)
        {
            switch(voteValue)
            {
                case "+":
                    TempData["message"] = "You voted up.";
                    break;
                case "-":
                    TempData["message"] = "You voted down.";
                    break;
                default:
                    TempData["message"] = "Your vote was not recognized.";
                    break;
            }

            if(Request.IsAjaxRequest())
            {
                return Content(TempData["message"].ToString());
            }
            else
            {
                return View();
            }
        }
    }
}

I had the same issue today (Oct 8, 2010) with my form with multiple submit buttons. The HTML didn't validate. I cleaned it up. It's still doesn't validate (but less error than the original) and now the value of clicked button is submitted.