ASP.Net MVC3 - Properly handle Ajax form submission on the server side

Question

I have a form that I would like to endow with wonderful Ajax-submission goodness

@using(Html.BeginForm()) {
  ...
}

I changed Html.BeginForm() to Ajax.BeginForm() but am not quite clear about what to do on the server side.

Previously, I used to do something like this:

[HttpPost]
public ActionResult EditMyStuff(MyViewModel vm) {
  if(!ModelState.IsValid)
    return View(vm);

  // save stuff
  return RedirectToAction("Index");         
}

And this is stuff I want to retain if the client has javascript disabled but if the form is submitted via Ajax clearly this is not what I want - I want any errors to appear in the validation summary on error or an "Your changes have been saved" message on success.

What is the standard way of doing this?

Felix Martinez · Accepted Answer · 2011-06-09 18:27:13Z

2

You have to add an If clause for the Ajax Request

if (Request.IsAjaxRequest()) 
{
    // Return PartialView or Json
}
else 
{
    // Normal response
}

answered Jun 9, 2011 at 18:27

Felix Martinez

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2 Comments

George Mauer Over a year ago

Awesome, is there a built-in way to return my ModelState errors then?

Felix Martinez Over a year ago

What I normally do is to add the error message on the ViewData dictionary (ViewBag if you're using ASP.NET MVC3)

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