Specifies the sorting type for the current column.
A ColumnSortOrder enumeration value specifying the sorting type for the current column.
Note that by default, if the IModelColumn.SortIndex property value does not equal -1, the Ascending sorting is applied. So, to disable sorting, you must set SortOrder to None and SortIndex to -1.
Sorting, specified by this property is directly applied to the data-aware control. To sort the underlying data source, use the IModelSorting node instead.