Hello again,
i have the kendo UI for MVC Q3 2012,but inside there is no example folder  so i can view the full example for the cascading.
I tried to implement the scenario from the demo,the online example ,but for the moment,the second dropdownlist is not activating when i choose a category.
the cshtml look like this:
<p>
    <label for="categories">Categories:</label>
    @(Html.Kendo().DropDownList()
          .Name("categ")
          .OptionLabel("Select category...")
          .DataTextField("CategoryName")
          .DataValueField("CategoryID")
          .DataSource(source => {
              source.Read(read =>
              {
                  read.Action("GetCascadeCategories", "Controls");
              });
          })
        
    )
</p>
<p>
    <label for="products">Products:</label>
    @(Html.Kendo().DropDownList()
          .Name("produc")
          .OptionLabel("Select product...")
          .DataTextField("ProductName")
          .DataValueField("ProductID")
          .DataSource(source =>
          {
              source.Read(read =>
              {
                  read.Action("GetCascadeProducts", "Controls")
                      .Data("filterProducts");
              }).ServerFiltering(true);
          })
          
          .Enable(false)
          .AutoBind(false)
          .CascadeFrom("categ")
          
       
    )
<script type="text/javascript">
        function filterProducts() {
            
            return {
                categories: $("#categ").val()
            };
        }
        
    </script>

the Code in controller look like this:
public JsonResult GetCascadeCategories()
        {
            

            return Json(_categoryRepository.GetAll().Select(c => new { CategoryId = c.CategoryID, CategoryName = c.CategoryName }), JsonRequestBehavior.AllowGet);
        }

        public JsonResult GetCascadeProducts(string categories)
        {
           
            var products = _productRepository.GetAll();

            if (!string.IsNullOrEmpty(categories))
            {
                products = products.Where(p => p.Category.CategoryName == categories);
            }

            return Json(products.Select(p => new { ProductID = p.ProductID, ProductName = p.ProductName }), JsonRequestBehavior.AllowGet);
        }

Or,can you send me a functional example taking data from a real database like Northwind.

Thanks in advance.