C#图像处理（3）：在图像上加条形码

引入Aspose.BarCode用来生成条形码，方法如下：

        /// <summary>
        /// 生成条码
        /// </summary>
        /// <param name="CodeString">生成条码的字符串</param>
        /// <param name="Path">条码保存的路径</param>
        /// <returns>条码保存的路径</returns>
        public bool CreateBarCode(string CodeString, string Path)
        {
            try
            {
                Aspose.BarCode.BarCodeBuilder builder = new Aspose.BarCode.BarCodeBuilder(CodeString, Symbology.GS1Code128);
                //string filenameurl = Application.StartupPath + @"xxx.gif";
                builder.BorderVisible = false;
                builder.BarHeight = 10f;
                builder.BorderWidth = 30f;
                builder.BorderDashStyle = Aspose.BarCode.BorderDashStyle.Solid;
                builder.CodeLocation = CodeLocation.Below;
                MarginsF Margin = new MarginsF(1, 1, 0, 0);
                builder.Margins = Margin;
                if (!System.IO.File.Exists(Path))
                {
                    builder.Save(Path);
                }
                else
                {
                    System.IO.File.Delete(Path);
                    builder.Save(Path);
                }
                builder.Dispose();
            }
            catch (Exception ex)
            {
                return false;
            }
            return true; ;
        }

将条形码加入到图片的指定位置：

        /// <summary>
        /// 图片上方加条码，条码将会被180度反转
        /// </summary>
        /// <param name="Img">待处理图片</param>
        /// <param name="ImgBarCode">写入的条码</param>
        /// <param name="UpMargin">180度反转后条码顶部距离上边缘距离</param>
        /// <param name="RightMargin">条码最左边距离右边缘距离</param>
        /// <returns></returns>
        public Bitmap BarCodeUp(Image Img, Image ImgBarCode, int UpMargin, int RightMargin)
        {
            //获取图片宽高
            int Width = Img.Width;
            int Height = Img.Height;
            //获取图片水平和垂直的分辨率
            float dpiX = Img.HorizontalResolution;
            float dpiY = Img.VerticalResolution;
            //创建一个位图文件
            Bitmap BitmapResult = new Bitmap(Width, Height, PixelFormat.Format24bppRgb);
            //设置位图文件的水平和垂直分辨率  与Img一致
            BitmapResult.SetResolution(dpiX, dpiY);
            //在位图文件上填充一个矩形框
            Graphics Grp = Graphics.FromImage(BitmapResult);
            System.Drawing.Rectangle Rec = new System.Drawing.Rectangle(0, 0, Width, Height);
            //向矩形框内填充Img
            Grp.DrawImage(Img, 0, 0, Rec, GraphicsUnit.Pixel);


            //平移Graphics对象
            Grp.TranslateTransform(Width - RightMargin, UpMargin);
            //设置Graphics对象的输出角度
            Grp.RotateTransform(180);
            //设置条码填充颜色
            //Brush brush = Brushes.Black;
            //旋转显示条码
            //Grp.DrawString(WriteString, new Font(FontType, FontSize), brush, 0, 0);
            Grp.DrawImage(ImgBarCode, 0, 0);
            //恢复全局变换矩阵
            Grp.ResetTransform();
            Grp.Dispose();
            GC.Collect();
            return BitmapResult;
        }