I am having a datagrid with sorting enabled when the user has not sorted any
column the selectedIndex of the datagrid and the index of the item in the
arraycollection are same.When the user sorted any column the index of the item
in the arraycollection and selectedIndex of the datagrid changes .How can i
maintain a unique id for each row with respect to the index of the
arraycollection.So that even sorting i can get the correct value.