//从Color类型得到RGB类型

        public int GetRGBFromColor(Color color)

        {

            byte r = color.R;

            byte g = color.G;

            byte b = color.B;

            //转化为32bit RGB值:

            int rgb = (r & 0xff) | ((g & 0xff) << 8) | ((b & 0xff) << 16);

            return rgb;

        }