How to alter a specific row's border in dataGridView?

[Barry Mossman]

Hi,

I want to alter the default border for specific rows in my grid.

I have found that i can turn off the default border via the PrePaintEvent as
follows:
if ((e.RowIndex > 2) && (e.RowIndex < 6))
{
e.PaintParts &= ~DataGridViewPaintParts.Border;

But how do i paint just the border manually?

Alternatively I can override in the PrePaintEvent via:

if ((e.RowIndex > 2) && (e.RowIndex < 6))
{
dataGridView1.CellBorderStyle =
DataGridViewCellBorderStyle.Sunken;

But this changes the whole grid. If I extend the above to also change the
border style explicitly for the other rows I get the result that i want, but
I get lots of flicker as the event ripples around firing in a loop.

I guess this is because a change to the grid's default border style causes
the grid to repaint. So how do i get access to just the row being painted,
so that I can change only it's border ?

thanks

Barry Mossman

 

[rwadstein]

You may want to look into overriding the AdjustCellBorderStyle(..)
method. It allows you to specify border characteristics for each side
of the border of a cell.

an example was shown on msdn.
http://msdn2.microsoft.com/en-us/library/system.windows.forms.datagridviewadvancedborderstyle.aspx

This example shows how you can change the border of one side of a
column. But it controls it on a cell level.

Hope this helps.