private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            E_Roles role = f_GetSelectedItem <E_Roles>();

            ctrlPParentDoctor.Visible = role == E_Roles.Assistant;
            ctrlPPeriod.Enabled       = role == E_Roles.Inspector;
        }
 private E_AccessLevels f_GetAccessLevel(E_Roles role)
 {
     return((Attribute.GetCustomAttribute(role.GetType().GetField(role.ToString()), typeof(Cl_AccessLevelAttribute)) as Cl_AccessLevelAttribute).AccessLevel);
 }