sizemode为zoom之后图片框中图片像素真实位置的确定

来源：互联网发布：淘宝上zara是真的吗编辑：程序博客网时间：2024/04/25 23:43

从网上搜到可以通过反射ImageRectangle 属性获取picturebox中sizemode=zoom之后显示的大小，

public Rectangle GetPictureBoxZoomSize(PictureBox p_PictureBox)
        {
            if (p_PictureBox != null)
            {
                PropertyInfo _ImageRectanglePropert = p_PictureBox.GetType().GetProperty("ImageRectangle", BindingFlags.Instance | BindingFlags.NonPublic);

                return (Rectangle)_ImageRectanglePropert.GetValue(p_PictureBox, null);
            }
            return new Rectangle(0, 0, 0, 0);
        }

稍加几行代码就实现了鼠标点击图片框中图片真实坐标的显示

        private void pictureBox1_MouseClick(object sender, MouseEventArgs e)
        {
            Bitmap bmp = (Bitmap )pictureBox1.Image;
            Rectangle rect=GetPictureBoxZoomSize(pictureBox1);
            int deltX = (pictureBox1.Width - rect.Width)/2;
            int deltY = (pictureBox1.Height - rect.Height)/2;
            int x = (e.X - deltX) * bmp.Width / rect.Width ;
            int y = (e.Y - deltY) * bmp.Height / rect.Height;
            label1.Text = x.ToString() + " " + y.ToString();
         }

按比例进行的计算，可能会稍微偏离一个像素