private byte[] PutLogoInImage(Image commodityImage, Image priceImage,
            string activePrice, bool checked11, Image brandLogoImage = null)
        {
            byte[] result = null;

            Image im = commodityImage;
            using (Image mypriceImage = priceImage.Clone() as Image)
            {
                LogoPriceImage(mypriceImage, activePrice, checked11);

                //建立畫刷
                using (Graphics g = Graphics.FromImage(im))
                {
                    g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                    g.PixelOffsetMode = System.Drawing.Drawing2D.PixelOffsetMode.HighQuality;
                    g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.Default;

                    if (brandLogoImage != null)
                    {
                        using (Bitmap bm = new Bitmap(brandLogoImage))
                        {
                            //打左上角
                            g.DrawImage(bm, new System.Drawing.Rectangle(0, 0, bm.Width, bm.Height), 0,
                                0, bm.Width, bm.Height, GraphicsUnit.Pixel);
                        }
                    }

                    using (Bitmap bm = new Bitmap(mypriceImage))
                    {
                        #region 縮圖
                        //var tempImg=  bm.GetThumbnailImage(250, 250, null, new IntPtr());
                        //g.DrawImage(tempImg, new Rectangle(im.Width - tempImg.Width, im.Height - tempImg.Height, tempImg.Width, tempImg.Height));  
                        #endregion

                        //bm.MakeTransparent(Color.White); //註釋掉，否則底圖會對圖示有影響 zhjw 20151102
                        //打到右下角
                        g.DrawImage(bm, new Rectangle(im.Width - bm.Width, im.Height - bm.Height, bm.Width, bm.Height));
                    }
                }
            }

            //將儲存好的圖片byte[]
            using (MemoryStream ms = new MemoryStream())
            {
                using (Bitmap bmp = new Bitmap(im))//必須建立一個新的物件
                {
                    var ici = GetImageEncoder(im);
                    if (ici == null)
                    {
                        bmp.Save(ms, im.RawFormat);
                    }
                    else
                    {
                        using (var ep = new EncoderParameters
                        {
                            Param = new EncoderParameter[] { 
                                new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L) }
                        })
                        {
                            bmp.Save(ms, ici, ep);
                        }
                    }
                    result = ms.ToArray();
                }
            }
            return result;
        }

        private static ImageCodecInfo GetImageEncoder(Image img)
        {
            //關鍵質量控制
            //獲取系統編碼型別陣列,包含了jpeg,bmp,png,gif,tiff
            var icis = ImageCodecInfo.GetImageEncoders();
            ImageCodecInfo ici = null;
            foreach (ImageCodecInfo i in icis)
            {
                if (img.RawFormat.Guid == i.FormatID)//圖片格式一致
                //if (i.MimeType == "image/png") //預設取 png編碼器
                {
                    ici = i;
                    break;
                }
            }
            return ici;
        }