C# WinForms DataGridView background color rendering too slow

Question

I\'m painting my rows in a DataGridView like this:

private void AdjustColors()
    {            
        foreach (DataGridViewRow row in aufgabenDataGridView.Row         


        

Answer 1

It's also a good idea to only set the properties if they differ from the expected value. That way you don't trigger unwanted internal DataGridView overhead.

If all cells in a row are formatted the same way, you can do the formatting on row level instead of cell level.

DataGridViewCellStyle rowStyle = row.DefaultCellStyle;
if (rowStyle.BackColor != status.BackColor) { 
   rowStyle.BackColor = status.BackColor;
}