Bind Select List with ViewBag in PartialView - ASP.NET Core MVC - asp.net-core-mvc

Question

I have two models Employee and Department, i am trying to bind a Select List with Department model in Employee Create PartialView using ViewBag:
public class Employee
{
[Key]
public int EmployeeId { get; set; }
public string EmployeeName { get; set; }
public string Email{ get; set; }
[ForeignKey("DepartmentId")]
public int DepartmentId { get; set; }
public virtual Department Department { get; set; }
}
public class Department
{
[Key]
public int DepartmentId { get; set; }
[Required]
public string DepartmentName { get; set; }
public virtual ICollection<Employee> Employees { get; set; }
}
EmployeeController:
public IActionResult Create()
{
List<Department> departments = _dbcontext.Department.ToList();
ViewBag.ListDepartments = new SelectList(departments, "DepartmentId", "DepartmentName");
Employee employee = new Employee();
return PartialView("_AddEmployeePartialView",employee);
}
_AddEmployeePartialView.cshtml:
#model WebApplication1.Models.Employee
<div class="modal fade" role="dialog" tabindex="-1" id="addEmployee" aria-labelledby="addEmployeeLabel" aria-hidden="true">
<div class="modal-dialog" role="document">
<div class="modal-content">
<div class="modal-header">
<h5 class="modal-title" id="addEmployeeLabel">Employees</h5>
<button type="button" class="close" data-dismiss="modal" aria-label="Close">
<span aria-hidden="true">×</span>
</button>
</div>
<div class="modal-body">
<form asp-action="Create" method="post">
<div asp-validation-summary="ModelOnly" class="text-danger"></div>
...
<div class="form-group">
<label asp-for="DepartmentId" class="control-label">DepartmentId</label>
<select asp-for="DepartmentId" class="form-control" asp-items="ViewBag.ListDepartments" ></select>
</div>
...
<div class="modal-footer">
<button type="button" class="btn btn-secondary" data-dismiss="modal">Cancel</button>
<button type="submit" class="btn btn-primary">Save</button>
</div>
</form>
</div>
</div>
</div>
</div>
But i got an empty Dropdownlist. How to resolve this? is the problem in the modal popup??

Answer 1

I found my mistake. In the Controler the ViewBage should be in Index Action not in Create action:
public IActionResult Index()
{
List<Department> departments = _dbcontext.Department.ToList();
ViewBag.ListDepartments = new SelectList(departments, "DepartmentId", "DepartmentName");
Employee employee = _dbContext.Employee.ToList();
return View(employee);
}