Bitmap To byte[]

/// <summary>
        /// Bitmap To byte[]
        /// </summary>
        /// <param name="bp">需转化的Bitmap图像</param>
        /// <returns>byte[]</returns>
        public static byte[] BitmapToBytes(Bitmap bp)
        {
            if (bp != null)
            {
                int w = bp.Width, h = bp.Height;
                byte[] byteImage = new byte[w * h];
                int index = 0;
                PointBitmap point_bmp = new PointBitmap(bp);
                point_bmp.LockBits();
                for (int y = 0; y < h; y++)
                {
                    for (int x = 0; x < w; x++)
                    {
                        byteImage[index] = point_bmp.GetPixel(x, y).R;
                        index++;
                    }
                }
                point_bmp.UnlockBits();
                return byteImage;
            }
            return null;
        }

需要指针法基类配合使用