Passing Data to View Master Pages base on login user

I've a problem with my mvc application, mvc 3 using spark view eng开发者_如何学Goine. I want to bind a dropdownlist that attached to application.spark (master page) base on HttpContext.User.Identity. the problem is..where I should place the ViewData that contain the SelectList as my DropDownList datasource ? This dropdown list will be accessed in all page in my application. there is an article about it : http://www.asp.net/mvc/tutorials/passing-data-to-view-master-pages-cs, but it didn't solved my problem, since I can't got User.Identity from ApplicationController.

any idea ?

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• You could create your own base Controller and override the OnActionExecuting method.

  protected override void OnActionExecuting(ActionExecutingContextfilterContext)
  {
      var userName = User.Identity.Name;
      ViewData["MySelectList"] = new SelectList(AllUsers, "Id", "UserName", userName );
  }
  

• You could create an action filter and override the 'OnActionExecuting' method - then apply that filter to every controller.

   public class MyCustomActionFilterAttribute : ActionFilterAttribute
   {
     public override void OnActionExecuting(ActionExecutingContext filterContext)
     {
       var userName =  filterContext.RequestContext.HttpContext.User.Identity.Name;
        filterContext.Controller.ViewData["MySelectList"] = new SelectList(AllUsers, "Id", "UserName", userName);
     }
   }
  
  [MyCustomActionFilter]
  public class HomeController:Controller
  {....
  }