Determine visible row # in winforms datagrid?

[xlar54]

How can I tell which rows are visible in a datagrid (winforms app)? I
have alot of data in the grid (bound to a datatable), and I need to
refresh that data frequently. (theres no easy way to know what data
has changed), so Im looking at just updating the visible portion of the
grid if this is possible.

 

[xlar54]

Ah found my own answer:

int firstVisibleRow =
dataGrid1.HitTest(dataGrid1.PreferredRowHeight+10,dataGrid1.RowHeaderWidth+10).Row;


int lastVisibleRow = firstVisibleRow + dataGrid1.VisibleRowCount;