C# WinForm中Panel实现用鼠标操作滚动条

由于在WinForm中Panel不能直接响应鼠标的滚动事件，只好采用捕获窗体的滚动事件。
方法如下：
在窗体的Load事件注册滚动事件，并增加对应的方法

        private void FormSample_Load(object sender, EventArgs e)

        {

            

            //注册事件

            this.MouseWheel += new MouseEventHandler(FormSample_MouseWheel);

        }



        /// <summary>

        /// 滚动方法

        /// </summary>

        /// <param name="sender"></param>

        /// <param name="e"></param>

        void FormSample_MouseWheel(object sender, MouseEventArgs e)

        {

            //获取光标位置

            Point mousePoint = new Point(e.X,e.Y);

            //换算成相对本窗体的位置

            mousePoint.Offset(this.Location.X, this.Location.Y);       

            //判断是否在panel内

            if (pnlDownload.RectangleToScreen(
              pnlDownload.DisplayRectangle).Contains(mousePoint))

            {

                //滚动

                pnlDownload.AutoScrollPosition = new Point(
                0, pnlDownload.VerticalScroll.Value - e.Delta);

            }

        }