asp.net mvc Ajax.BeginForm

Question

I'm having some difficulties with Ajax.BeginForm

I have something like this in a view

  <% using (Ajax.BeginForm("ActionName", null , null, new { id = "FormName" }))
     {%>
      <input type="hidden" value = '<%= Html.Encode( Model.id) %>' name="id"/>
      <textarea id="message" name=message rows="4" style="width: 90%"> 
      </textarea>
  <% }%}

And the action method is something like this

    [AcceptVerbs(HttpVerbs.Post)]
    [Authorize]
    public ActionResult ActionName(int id, string message)
    {
     ....
    }

I'm trying to pass the 'id' and 'message' to the action method. I'm passing 'null' for routeValues but I dont know what to pass. Ideally I was trying to find an overload that did not require route values but took actionName and htmlattributes (for form name) but I could not find one.I don't want to add 'message' to the view-model and I do need the FormName in there for jquery operations. What is the best way to work around this problem ?

Oh, I forgot to mention, This is how I post the form

 $.post($("#FormName").attr('action'), $("#FormName").serialize(),
                               function(result) {
                                   $("#correspondingDiv").html(result);
                               }
                            );

Answer 1

Use this overload: http://msdn.microsoft.com/en-us/library/dd470605.aspx

Ajax.BeginForm(
    string "ActionName",
    string "ControllerName",
    new routevalues {id="IDValue",message="MyMessage"},
    new AjaxOptions {OnBegin=[someFunction], OnFailure=[failureFunction] },
    new { id = "FormName" }
)