问如何将DropDownlist添加到用户页面？

EN

public class User : AbpUser<User>
{
    public virtual Guid? ProfilePictureId { get; set; }

    public virtual bool ShouldChangePasswordOnNextLogin { get; set; }
    // Others propierties...

    public int? DepartmendId {get;set;}
    public virtual Department Department {get;set;}
}

public class UserEditDto : IPassivable
{
    /// <summary>
    /// Set null to create a new user. Set user's Id to update a user
    /// </summary>
    public long? Id { get; set; }

    [Required]
    [StringLength(AbpUserBase.MaxNameLength)]
    public string Name { get; set; }

    [Required]
    [StringLength(AbpUserBase.MaxSurnameLength)]
    public string Surname { get; set; }

    // Other Properties...
    public int DepartmentId {get; set;}
}