property Column.DefaultSortOrder as Boolean
Specifies whether the default sort order is ascending or descending.

TypeDescription
Boolean A boolean expression that specifies the default sort order.

Use the DefaultSortOrder property to specify the default sort order, when the column's header is clicked. Use the SortOnClick property to specify when user can sort the columns by clicking the control's header. Use the SortOrder property to sort a column. Use the SortChildren method to sort  items at runtime. Use the SingleSort property to allow sorting by multiple columns.