How to create navigation menu from database

1) Add a class named "CustomHHelpers" in your model folder.

namespace MvcApplication2.Models
{
    public static class CustomHHelpers
    {
        public static MvcHtmlString getTopMenu(this HtmlHelper htmlHelper,

  string url)
        {
            StringBuilder sbMenu = new StringBuilder();
            sbMenu.Append("<ul>");
            sbMenu.Append("<li><a href=\"" + url + "\">Home</a></li>");

            var menus = menuItems.insertDemoData();
            foreach (var m in menus)
            {
                sbMenu.Append("<li><a href=\"" + url + "\\" + m.url + "\">" 

 + m.urlName + "</a></li>");
            }
            //==== Close dynamic menu unordered list.
            sbMenu.Append(" <li><a href=\"#\">Contact Us</a></li>");
            sbMenu.Append("</ul>");
            return MvcHtmlString.Create(sbMenu.ToString());
        }
    }
    public class menuItems
    {
        public int Id { get; set; }
        public string urlName { get; set; }
        public string url { get; set; }

        public static List<menuItems> insertDemoData()
        {
            List<menuItems> obj = new List<menuItems>();
            obj.Add(new menuItems { Id = 1, 

urlName = "Anketler", url = "Anketler" });
            obj.Add(new menuItems { Id = 1, 

 urlName = "Duyurular", url = "Duyurular" });
            obj.Add(new menuItems { Id = 1, 

urlName = "Kullanıcı Profili", url = "Profil" });
            return obj;
        }
    }
}

2) Use in your _Layout.html or where you want to use:
@Html.getTopMenu(@Url.Content("~/"+@ViewContext.RouteData.Values["controller"].ToString()))