我有一个pictureBox在一个面板，我一直有问题，编程面板的滚动跟随鼠标在pictureBox中的位置。我把图片框设置在panel的中间，但是如果picturebox1.Width〉panel1.Width，我就把图片框设置在location（0，0），下面是我的代码：

public float scaleModification = 1f;

        private void PictureBox1_MouseWheel(object sender, MouseEventArgs e)
        {
            if (ModifierKeys.HasFlag(Keys.Control))
            {
                setPictureToLocationZero();
                if (e.Delta > 0)
                {
                    scaleModification *= 1.1f;
                    pictureBox1.Scale(new SizeF(1.1f, 1.1f));
                }
                else
                {
                    scaleModification *= 0.9f;
                    pictureBox1.Scale(new SizeF(0.9f, 0.9f));
                }
                setPanelScroll(new PointF(e.X, e.Y));
            }
        }

private void setPanelScroll(PointF mousePos)
        {
            //panel1.ScrollControlIntoView(pictureBox1);
            var p = panel1.AutoScrollPosition;
            p.X = -p.X;
            p.Y = -p.Y;
            p.X += (int)((mousePos.X * scaleModification) - mousePos.X) ;
            p.Y += (int)((mousePos.Y * scaleModification) - mousePos.Y);
            panel1.AutoScrollPosition = new Point(p.X,p.Y);
        }

private void pictureBox1_SizeChanged(object sender, EventArgs e)
        {
            if (pictureBox1.Width > panel1.Width)
            {
                setPictureToLocationZero();
            }
            else
            {
                setPictureToMiddle();
            }
        }

private void setPictureToLocationZero()
        {
            pictureBox1.Location = new Point(0, 0);
        }

        private void setPictureToMiddle()
        {
            int x = (panel1.Width - pictureBox1.Width) / 2;
            int y = (panel1.Height - pictureBox1.Height) / 2;
            pictureBox1.Location = new Point(x,y);
        }

我希望当鼠标滚轮滚动缩放是激活面板的滚动跟随光标在图片框的位置。我将感谢很多任何帮助!