Class: TEgFireGridColumn
property SortDirection: TEgFireGridSortDirection;Run time only, not stored. The sort direction the column’s title
shows: fgsNone, fgsAscending or
fgsDescending. A click on the title changes it (see Sortable)
and fires OnSortChange;
the grid never sorts the data itself.
It can be assigned in code to show the order the dataset already has,
for example after opening it with an ORDER BY: set it on
one column (and fgsNone on the others), then call NotifyChanged
so the titles are laid out again. Assigning it does not fire
OnSortChange.