如何更改Datagridview列分隔符颜色C＃WinForms

Question

First i tried changing dataGridView1.BackgroundColor, dataGridView1.GridColor but didn't worked.. then i tried dataGridView1.EnableHeadersVisualStyles = false dataGridView1.ColumnHeadersDefaultCellStyle.BackColor = Color.White but nothing worked for me..

Answer 1

You need to handle CellPainting event and fill the background with desired color, for example the same color as GridColor , then perform the rest of painting by limiting the paint area to a rectangle excluding divider:

private void DataGridView1_CellPainting(object sender, DataGridViewCellPaintingEventArgs e)
{
    if (e.RowIndex == -1)
    {
        var dgv = (DataGridView)sender;
        var r = e.CellBounds;
        var w = 0;
        if (e.ColumnIndex > -1)
        {
            w = dgv.Columns[e.ColumnIndex].DividerWidth;
            r.Width = r.Width - w;
        }
        e.Graphics.SetClip(r);
        e.Paint(r, DataGridViewPaintParts.All);
        e.Graphics.SetClip(e.CellBounds);
        if (w > 0)
        {
            r = new Rectangle(r.Right - 1, r.Top, w + 1, r.Height);
            using (var brush = new SolidBrush(dgv.GridColor))
                e.Graphics.FillRectangle(brush, r);
        }
        e.Handled = true;
    }
}

For example, if you set DividerWidth for the columns to 10 and set GridColor to Color.Red you can get the following result using above code: