c# - ViewData Int32 must be of type IEnumerable when viewing from stored procedure -

i don't know if because of stored procedure did. error

the viewdata item has key 'department' of type 'system.int32' must of type 'ienumerable'.

here's code :

(view)

  <div class="col-lg-4">       <%: html.dropdownlistfor(m => m.department, model.departments, "please select", ((viewbag.role >= 2 && viewbag.role <= 5)  ? (object)new { @class="form-control", @onchange="onchangedepartment(this.value);" }:(object)new { @class="form-control", @disabled="disabled" }))%>  </div> 

(model)

public bool loaddepartmentsfromdb()         {             workflowentities entity = new workflowentities();              list<selectlistitem> departments = new list<selectlistitem>();             list<selectlistitem> supervisors = new list<selectlistitem>();              foreach (sp_departmentmaster_getall_result sp_depts in entity.sp_departmentmaster_getall()) {                  departments.add(new selectlistitem {                      value = sp_depts.departmentid.tostring()                     , text = sp_depts.departmentname                     , selected = sp_depts.departmentid == department                 });                  supervisors.add(new selectlistitem {                      value = sp_depts.supervisorid.tostring()                     , text = sp_depts.supervisorname                     , selected = sp_depts.departmentid == department                 });                  if (sp_depts.departmentid == department) this.supervisor = sp_depts.supervisorid;             }              this.departments = departments;             this.supervisors = supervisors;              return true;         } 

did missed ?

added :

public ienumerable<selectlistitem> departments { get; set; } 

stored procedure property

public partial class sp_departmentmaster_getall_result     {         public int departmentid { get; set; }         public string departmentname { get; set; }         public int supervisorid { get; set; }         public string supervisorname { get; set; }     }