In spark datagrid we need to add "lockedcolumncount", Which does't exist in spark datagrid. Why its removed and what is equivalent to the property lockedColumnCount.How to achieve it.
It was not “removed”, the Spark DataGrid was a total rewrite and that feature was never completed before Adobe donated Flex to Apache.
Looks like Adobe Flex 4.9.1 has a Spark Datagrid with lockedColumnCount. I don’t think it has been completely tested, but give it a try.