paint rectangle on column header

Question

I\'m painting rectangle on the column headers in datagridview but on scrolling to right it disappears as in the picture (scroll.png)

Answer 1

I have tested your code and the line responsible for the behaviour you are describing is this.dataGridView1.Invalidate(rtHeader);

Thus you have two solutions:

• Deleting the aforementioned line.
• Or putting the rectanges in the cells (in the first row, would be fine), rather than in the headers.