Winform TreeView自定义样式侧边导航栏

先看效果，鼠标悬浮效果不理想，显示效果比较差，被我PASS了

在窗体上拖出TreeView控件，如果需要图标显示还需要拖出ImageList用来存图标

图标资源的话可以自己在网上找，我用的是阿里图库：https://www.iconfont.cn/

将ImageList和TreeView绑定起来，并将根节点编辑好

点击TreeView属性=》事件 双击圆圈中的事件

  private void sideMenu_DrawNode(object sender, DrawTreeNodeEventArgs e)
        {
            e.DrawDefault = false;
            Graphics g = e.Graphics;
            SolidBrush txtBrush = new SolidBrush(Color.FromArgb(30, 123, 182));         //被选中的字体颜色
            SolidBrush bacBrush = new SolidBrush(Color.FromArgb(243, 243, 243));         //被选中的背景颜色

            SolidBrush txtBrush1 = new SolidBrush(Color.FromArgb(46, 45, 43));         //未选中的字体颜色
            SolidBrush bacBrush1 = new SolidBrush(Color.FromArgb(255, 255, 255));         //未选中的背景颜色


            int picSize = 25;
            int picX = e.Bounds.X + 20;
            int picY = e.Bounds.Y + sideMenu.ItemHeight / 5;

            StringFormat sf = new StringFormat();
            sf.Alignment = StringAlignment.Center;
            sf.LineAlignment = StringAlignment.Center;

            if (e.Node.IsSelected)
            {
                //节点背景
                g.FillRectangle(bacBrush, e.Bounds);

                //节点名称
                g.DrawString(e.Node.Text, sideMenu.Font, txtBrush, e.Bounds, sf);

                //g.DrawLine(new Pen(txtBrush, 10), e.Bounds.X, e.Bounds.Y, e.Bounds.X, e.Bounds.Y + e.Bounds.Width);
            }
            else
            {
                g.FillRectangle(bacBrush1, e.Bounds);

                g.DrawString(e.Node.Text, sideMenu.Font, txtBrush1, e.Bounds, sf);
            }

            var pen = new Pen(Brushes.LightGray, 1);
            g.DrawRectangle(pen, e.Bounds);

            if (sideImageList.Images.Count > 0)
            {
                g.DrawImage(sideImageList.Images[e.Node.ImageIndex], picX, picY, picSize, picSize);
            }

            txtBrush.Dispose();
            bacBrush.Dispose();
            txtBrush1.Dispose();
            bacBrush1.Dispose();
            pen.Dispose();
            sf.Dispose();
            g.Dispose();
        }

最后一点比较重要：将DrawMode修改为OwnerDrawAll

鼠标点击效果如下

标签：txtBrush,自定义,Dispose,Bounds,sf,new,TreeView,SolidBrush,Winform
来源： https://www.cnblogs.com/lululo/p/15918547.html