Dropdowns not rendered when override object.cshtml MVC4 - asp.net-mvc-4

Question

My actual problem was mentioned here.
Hide property of model in dynamic view
To solve the problem, I have overrided object.cshtml as mentioned in the answer.
However, when I did this, the dropdowns that I am rendering using UIHints are not working.
In place of dropdown, just False, False False (the no.of Falses are equal to number of list items I have in my viewdata) are displayed.
I am not sure what is happening here, can somebody advise what is going on?
in my controller:
ViewData["PartyRoleTypeId"] = (IEnumerable<SelectListItem>)PartyRoleTypeRepo.All()
.ToList()
.Select(p => new SelectListItem { Value = p.PartyRoleTypeId.ToString(), Text = p.Caption, Selected = p.PartyRoleTypeId == obj.PartyRoleTypeId });
ViewData["PartyId"] = (IEnumerable<SelectListItem>)PartyRepo.All()
.ToList()
.Select(p => new SelectListItem { Value = p.PartyId.ToString(), Text = p.Organization.Caption, Selected = p.PartyId == obj.PartyId });
My dropdown edit template in shared/editortemplates/DropDownList.cshtml
#{
var fieldName = ViewData.ModelMetadata.PropertyName;
}
#Html.DropDownList("",(IEnumerable<SelectListItem>)ViewData[fieldName], "Choose..." , new { #class ="combo"})
object.cshtml
#functions
{
bool ShouldShow (ModelMetadata metadata)
{
return metadata.ShowForEdit
&& metadata.ModelType != typeof(System.Data.EntityState)
&& !metadata.IsComplexType
&& !ViewData.TemplateInfo.Visited(metadata);
}
}
#if (ViewData.TemplateInfo.TemplateDepth > 1)
{
if (Model == null)
{
#ViewData.ModelMetadata.NullDisplayText
}
else
{
#ViewData.ModelMetadata.SimpleDisplayText
}
}
else
{
//ViewData.Clear();
foreach (var prop in ViewData.ModelMetadata.Properties.Where(pm => ShouldShow(pm)))
{
if (prop.HideSurroundingHtml)
{
#Html.Editor(prop.PropertyName)
}
else if (prop.DisplayName == "Id")
{
<div></div>
}
else if (!string.IsNullOrEmpty(Html.Label(prop.PropertyName).ToHtmlString()))
{
<div class="editor-label">#Html.Label(prop.PropertyName)</div>
}
<div class="editor-field">#Html.Editor(prop.PropertyName) #Html.ValidationMessage(prop.PropertyName, "")</div>
}
}

Answer 1

There is some problem with keeping my dropdown values in ViewData or ViewBag.
When I use these, for prartyroletypeid it is not recognizing UIHint dropdownlist.cshtml. It is still referring to object.cshtml.
Instead I kept the dropdown data in TempData and everything is working fine.
But not sure, if I can use TempData in this context.
Any ideas???