轉載https://blog.csdn.net/qq_28249373/article/details/75947856

轉載https://blog.csdn.net/zgke/article/details/4372246

C# 獲取PictureBox的SizeMode為Zoom圖形的大小

可以通過反射ImageRectangle 屬性獲取最後顯示的大小..

方法

/// <summary>
        /// 獲取PictureBox在Zoom下顯示的位置和大小
        /// </summary>
        /// <param name="p_PictureBox">Picture 如果沒有圖形或則非ZOOM模式 返回的是PictureBox的大小</param>
        /// <returns>如果p_PictureBox為null 返回 Rectangle(0, 0, 0, 0)</returns>
        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);
        }