How do I programmatically scroll a winforms datagridview control?

Question

I'm implementing some drag drop features in one my controls inheriting from a datagridview. Basically I'm dragging a row from somewhere in the DGV and dropping it somewhere else, reordering the rows. I've run into a problem though. If the DGV is too large such that there's a scrollbar, how can I have the DGV scroll up or down while the user is in the middle of a dragdrop?

I know how to get the current mouse position and also get the position of the dgv rectangle and such. So, I can easily find out if i'm in the top or bottom half of the rectangle... I just need a way to programmatically scroll the dgv. I'd prefer if I don't have to keep changing the selected cell to do this.

Any suggestions?

Thanks

Isaac

Answer 1

Well, since this is a datagridview... Sorry for the 'winforms' in the question... but I could just do this.. scrolling up or down one row.

Scroll up:

this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex - 1

Scroll Down:

this.FirstDisplayedScrollingRowIndex = this.FirstDisplayedScrollingRowIndex + 1;

You've gotta make sure to check that the numbers don't go out of bounds though.

Answer 2

dgv.FirstDisplayedScrollingRowIndex = dgv.RowCount - 1;