我可以使用图片框缩放图表吗？

我使用下面的代码缩放图片。它是否正常工作。

i use below code for zoom of picture. it works correctly.

我可以将它用于图表吗？

can i use it for chart?

我的意思是我将它用于图表，但它没有用。图表剂量没有"  e.Graphics.ScaleTransform（缩放，缩放）;"或"e.Graphics.DrawImage（img，imgx，imgy）;" 。

i mean i used it for chart but it did not work . chart dose not have " e.Graphics.ScaleTransform(zoom, zoom);" or "e.Graphics.DrawImage(img, imgx, imgy);" .

imgx或imgy应该怎么做？ 

what should i do by imgx or  imgy ? 

zoom cod for图片框中的图片：

zoom cod for image in picturebox :

 protected override void OnMouseWheel(MouseEventArgs e)
        {


            _pic_image.Image = null;
            this.Cursor = Cursors.Default;
            float oldzoom = zoom;

            if (e.Delta > 0)
            {
                zoom += 0.625f;
                zoomPerectNum += 50;
                _txt_precentZoom.Text = zoomPerectNum.ToString() + "%";
            }

            else if (e.Delta < 0)
            {
                // zoom = Math.Max(zoom - 1F, 1F);
                zoom = zoom - 0.625F;

                if (zoom < 0.2503874F)
                {
                    zoom = 0.2503874F;
                }
                else
                {
                    zoomPerectNum -= 50;
                    _txt_precentZoom.Text = zoomPerectNum.ToString() + "%";
                }
            }

            MouseEventArgs mouse = e as MouseEventArgs;
            Point mousePosNow = mouse.Location;

            int x = mousePosNow.X - _pic_image.Location.X;    // Where location of the mouse in the pictureframe
            int y = mousePosNow.Y - _pic_image.Location.Y;

            int oldimagex = (int)(x / oldzoom);  // Where in the IMAGE is it now
            int oldimagey = (int)(y / oldzoom);

            int newimagex = (int)(x / zoom);     // Where in the IMAGE will it be when the new zoom i made
            int newimagey = (int)(y / zoom);

            imgx = newimagex - oldimagex + imgx;  // Where to move image to keep focus on one point
            imgy = newimagey - oldimagey + imgy;

            _pic_image.Refresh();  // calls imageBox_Paint
        }

        private void imageBox_Paint(object sender, PaintEventArgs e)
        {
            e.Graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
            e.Graphics.ScaleTransform(zoom, zoom);


            if (img != null)
            {
                e.Graphics.DrawImage(img, imgx, imgy);
            }

        }