XtraGrid GroupRow不显示分组展开图标,以及颜色普通化(学,会的别见笑,不会的拿去用)

总是感觉这种样式有点怪怪的，如下：

总想让这个表格更普通化一点，如下：

于是用到了下面这些代码:

private void gView_CustomDrawGroupRow(object sender, DevExpress.XtraGrid.Views.Base.RowObjectCustomDrawEventArgs e)
        {
            GridGroupRowInfo groupRowInfo = e.Info as GridGroupRowInfo;
            Rectangle groupRowBounds = groupRowInfo.DataBounds;
            Rectangle expandButtonBounds = groupRowInfo.ButtonBounds;
            Rectangle textBounds = e.Bounds;
            textBounds.X = expandButtonBounds.Right + 4;

            Brush brushText = Brushes.Black, brushTextShadow = Brushes.White;
            string s = gView.GetGroupRowDisplayText(e.RowHandle);
            e.Appearance.DrawString(e.Cache, s, textBounds, brushText);
            e.Handled = true;
        }

        private void gView_GroupRowCollapsing(object sender, DevExpress.XtraGrid.Views.Base.RowAllowEventArgs e)
        {
            e.Allow = false;            
        }

        private void gView_CustomDrawRowFooter(object sender, DevExpress.XtraGrid.Views.Base.RowObjectCustomDrawEventArgs e)
        {
            Brush brush = new System.Drawing.Drawing2D.LinearGradientBrush(e.Bounds, Color.White, Color.White, 90);
            e.Graphics.FillRectangle(brush, e.Bounds);
            e.Handled = true;
        }