ASP.NET MVC 2 DropDownList不呈現

Question

所以我不明白我在這裏做錯了什麼。我想在我的ASP.NET MVC 2應用程序的母版頁中填充一個DropDownList。

Projects.Master

<div id="supaDiv" class="mainNav"> 
<% Html.DropDownList("navigationList"); %> 
</div> 

MasterController.cs

namespace ProjectsPageMVC.Controllers.Abstracts 
{ 
    public abstract class MasterController : Controller 
    { 
     public MasterController() 
     { 
      List<SelectListItem> naviList = new List<SelectListItem>(); 

      naviList.Add(new SelectListItem 
      { 
      Selected = true, 
      Text = "AdvanceWeb", 
      Value = "http://4168web/advanceweb/" 
      }); 

      naviList.Add(new SelectListItem 
      { 
      Selected = false, 
      Text = " :: AdvanceWeb Admin", 
      Value = "http://4168web/advanceweb/admin/admindefault.aspx" 
      }); 

      ViewData["navigationList"] = naviList; 
     } 
    } 
} 

DropDownList控件甚至沒有顯示出來的DOM，我很茫然，什麼我做錯了。

ProjectsController

namespace ProjectsPageMVC.Controllers 
{ 
    public class ProjectsController : MasterController 
    { 
     public ActionResult Index() 
     { 
      return View(); 
     } 
    } 
} 

Answer 1

變化

<% Html.DropDownList("navigationList"); %> 

到

<%=Html.DropDownList("navigationList") %> 

Answer 2

更改您的標記：

<%= Html.DropDownList("navigationList", (SelectList)ViewData["navigationList"]); %>