Possible enumeration values:

NameValueDescription
Newest

1

MostViewes

2

Free

3

SpecialOffer

4

HaveDiscount

5

WeeklySpecialOffer

6

TopScore

7

WishList

8

MostPrice

9

MinPrice

10

Priority

11

Recommended

12

FirstPage_1

13

FirstPage_2

14

FirstPage_3

15

FirstPage_4

16

MtnStaff

17

SingleCourse

18