title: Selecting option in parent dropDownList does not send updated value to child dropDownList
body: <p>I have two dropDownLists that are being used to populate data in the view model of a partial view. One of the dropDownLists cascades from the other. As I change the selection of the parent, the child datasource doesn't receive the updated value.</p>
  
  <p>This is the partial view (which can be on the page multiple times):</p>
  
  <pre><code>@model ViewModel
  
  @(Html.Kendo().DropDownListFor(m =&gt; m.Parent.Id)
                .Name("Parent_" + Model.Id)
                .OptionLabel("Select parent...")
                .DataTextField("Text")
                .DataValueField("Id")
                .DataSource(source =&gt;
                {
                    source.Read(read =&gt;
                    {
                        read.Action("GetParentOptions", "Controller");
                    });
                })
  )
  
  @(Html.Kendo().DropDownListFor(m =&gt; m.Child.Id)
                .Name("Child_" + Model.Id)
                .OptionLabel("Select child...")
                .DataTextField("Text")
                .DataValueField("Id")
                .DataSource(source =&gt;
                {
                    source.Read(read =&gt;
                    {
                        read.Action("GetChildOptions", "Controller", new { parentId = Model.Parent.Id });
                    })
                        .ServerFiltering(true);
                })
                .Enable(false)
                .AutoBind(false)
                .CascadeFrom("Parent_" + Model.Id)
  )
  </code></pre>
  
  <p>And here are the Controller actions:</p>
  
  <pre><code>public JsonResult GetParentOptions()
  {
      var options = ParentService.GetOptions();
  
      return Json(options, JsonRequestBehavior.AllowGet);
  }
  
  public JsonResult GetChildOptions(int? parentId)
  {
      var options = ChildService.GetOptions(parentId);
  
      return Json(options, JsonRequestBehavior.AllowGet);
  }
  </code></pre>