DropdownList bind and get detail

DropdownList bind and get detail

Calling Statement:

 ViewBag.CategoryDropDownList= categoryBind(0);

Method:

public List<SelectListItem> categoryBind(int CategoryId)

        {

            List<SelectListItem> CategoryDropDownList = new List<SelectListItem>();

            List<Category> CategoryList = new PostRepository().GetAllCategory();

            foreach (var item in CategoryList)

            {

                if (item.CatId == CategoryId)

                {

                    CategoryDropDownList.Add(new SelectListItem { Text = item.CatName, Value = Convert.ToString(item.CatId), Selected=true});

                }

                else

                {

                    CategoryDropDownList.Add(new SelectListItem { Text = item.CatName, Value = Convert.ToString(item.CatId)});

                }

            }

            return CategoryDropDownList;

        }

View Side:

<script>

        var jqListUser = jQuery.noConflict();

        jqListUser(document).ready(function () {

            jqListUser('#CategoryDropDownList').change(function () {               

                list = jqListUser1(this);

                var listvalue = list.val();

                document.getElementById("dropdownselectedid").click();

            });

        });

</script>

@using (Html.BeginForm("ListUserPictures", "Picture", FormMethod.Post, new { id = "formUserpicture" }))

 {

@Html.DropDownList("CategoryDropDownList")

   <input type="submit" id="dropdownselectedid" name="dropdownselectedid"   style="display:none" />

}

Fetching Data(Post Method):

CategoryId = Convert.ToInt32(Request.Form["CategoryDropDownList"]);