The ViewData item that has the key 'Conf_Type' is of type

Question

When I apply server side validation, I am getting error in dropdown 

 

The ViewData item that has the key 'Conf_Type' is of type 'System.Int32' but must be of type 'IEnumerable<SelectListItem>'.

 

Model :

public int Conf_Type { get; set; } 

 

View: 

@if (ViewBag.Action == "Edit")                            

 {                                 

@Html.DropDownList("Conf_Type", ViewBag.Assets_Type as SelectList, new { @class = "form-control" })                             

}                             

else                             

{                                 

@Html.DropDownList("Conf_Type", ViewBag.Assets_Type as SelectList, "Select Type", new { required = "required", validationmessage = "Please select Type", selected = @Model.Assets_Type, @class = "form-control" })                            

}

 

Controller:

public ActionResult Index(int? id)   

{             

VarsityContext VarsityDB = new VarsityContext();             

Varsity.Models.Configuration configuration = new Varsity.Models.Configuration();     

try             

{                 

TempData["Asset Inventory"] = "Asset Inventory";                 

if (id != null)                 

{                     

configuration = VarsityDB.Configurations.Single(a => a.Conf_ID == id); 

 ViewBag.Action = "Edit";                     

 }                 

else                

 {                     

ViewBag.Action = "Create";                

 }                                  

 IEnumerable<SelectListItem> basetypes = new SelectList(cwConfiguration.getConfigurationTypes(), "Id", "Name", configuration.Conf_Type);              

   ViewBag.Conf_Type = basetypes;             

}             

catch (Exception ex)            

 {  }            

 return View(configuration);         

}