Flex datagrid re-assign dataprovider

Hi,
I am working on a datagrid with custom itemRenderer & [Bindable]xmllist as dataprovider. Now the changes done in xmllist are not reflected on datagrid UI until unless I re-assign the dataprovider as the same xmllist.
As the dataprovider is Bindable so re-assigning is not required.
But it was not working so I re-assigned the xmllist to the dataprovider of datagrid. It worked.
Now my problem is when I re-assign the dataprovider my datagrid flicker(refreshes). It should not happen.
1) Is there any way out to avoid re-assigning of dataprovider?
2) Is there any way to stop flickering of datagrid on re-assigning the dataprovider?
Thanks in advance.

When you change a value in the dataprovider itemupdated method needs to be called in order to make the change reflected. Try using some thing like below
ICollectionView(grid.dataProvider).itemUpdated( event.item, grid.columns[event.columnIndex].dataField );
incase you are not having event then replace it with the item you are updating in the dataprovider.

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