//渲染背景 包括menustrip背景 toolstripDropDown背景 protected override void OnRenderToolStripBackground(ToolStripRenderEventArgs e) { var toolStrip = e.ToolStrip; var g = e.Graphics; //g.SmoothingMode = SmoothingMode.HighQuality;//抗锯齿 Share.GraphicSetup(g); var bounds = e.AffectedBounds; //DrawHelper.RenderFormBorder(MenuBgImg, 20, g, e.); if (toolStrip is MenuStrip) { // g.FillRectangle(Brushes.Orange, bounds); //DrawHelper.RenderFormBorder(MenuBgImg, 20, g, bounds); } else if (toolStrip is ToolStripDropDown) { // g.FillRectangle(Brushes.Orange, bounds); //背景圆角 DrawHelper.SetWindowRegion(toolStrip, 1); using (var sb = new SolidBrush(Share.BackColor)) { g.FillRectangle(sb, bounds); //画边线 sb.Color = Share.BorderColor; var pen = new Pen(sb); var gp = DrawHelper.CreateRoundPath2(bounds, 2); e.Graphics.DrawPath(pen, gp); pen.Dispose(); gp.Dispose(); } //int Rgn = NativeMethods.CreateRoundRectRgn(0, 0, bounds.Width + 1, bounds.Height + 1, 3, 3); //NativeMethods.SetWindowRgn(e.ToolStrip.Handle, Rgn, true); //toolStrip.BackColor = Color.White; //DrawHelper.RenderFormBorder(MenuBgImg, 27, g, bounds); } else { // g.FillRectangle(Brushes.Orange, bounds); // g.FillRectangle(Brushes.Orange, bounds); //e.Graphics.Clear(Color.Transparent); base.OnRenderToolStripBackground(e); } }