title: MVC3 model binding does not update the partial view
body: <p>Any ideas why after adding Model Binding to the controller, the partial view no longer gets updated:</p>
  
  <p>All I did was change the signature:</p>
  
  <p>from:</p>
  
  <pre><code>public ActionResult About2()
  </code></pre>
  
  <p>to:</p>
  
  <pre><code>public ActionResult About2([Bind(Prefix = "SomePropertyToBind")] String modelString)
  </code></pre>
  
  <p>and here is the Ajax.BeginForm:</p>
  
  <pre><code>@using (Ajax.BeginForm("About2", "Home", new AjaxOptions { UpdateTargetId = "property22", InsertionMode = InsertionMode.Replace }))
  {    
      @Html.DropDownListFor(m =&gt; m.ModelTest.SomePropertyToBind, new SelectList(Model.ModelTest.list, "property1", "property2"))
  
      &lt;button type="submit" id="test"&gt;Click me&lt;/button&gt;    
  }
  </code></pre>
  
  <p>I've attached a sample: <a href="http://www.sendspace.com/file/7boodv" rel="nofollow">http://www.sendspace.com/file/7boodv</a></p>
  
  <p>Thanks,</p>