Way to crossreference datagrid row to bund table

[Dave Alessi]

I have a datagrid that is bound to a DataTable.
I want to loop through and edit the grid which has
template columns that are editable.

It is necessary to crossreference the grid row, to the
dataTable row. They may be different due to deletions.

Is there a property that specifies which row in a grid
that the item is bound to? I looked at "Item.DataItem"
and "Item.DataSource" but netither seem to be what I am
looking for.