/// <summary>        ///         /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;                int scale = 4;                qrCodeEncoder.QRCodeScale = scale;                int version = 7;                qrCodeEncoder.QRCodeVersion = version;                qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;                System.Drawing.Image image;                String data = http://www.mamicode.com/Request.Url.AbsoluteUri;//"http://www.dusystem.com/  涂聚文";                image = qrCodeEncoder.Encode(data);                //picEncode.Image = image;                string filename = "geovinduQrcode.jpg";                string file = Server.MapPath(filename);                image.Save(file);                this.Image1.ImageUrl = filename;            }        }        /// <summary>        ///         /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Button1_Click(object sender, EventArgs e)        {            QRCodeEncoder encoder = new QRCodeEncoder();            encoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.H; // 30%            encoder.QRCodeScale = 10;            System.Drawing.Image img = encoder.Encode("www.dusystem.com");            string filename = "geovinduQrcodeVi.jpg";            string file = Server.MapPath(filename);            string log = Server.MapPath("nasa.bmp");            System.Drawing.Image logo = System.Drawing.Image.FromFile(log);            int left = (img.Width / 2) - (logo.Width / 2);            int top = (img.Height / 2) - (logo.Height / 2);            Graphics g = Graphics.FromImage(img);            g.DrawImage(logo, new Point(left, top));            string filename1 = "QrcodeVi.jpg";            img.Save(Server.MapPath(filename1));            this.Image2.ImageUrl = filename1;        }

 /// <summary>        ///         /// </summary>        /// <param name="sender"></param>        /// <param name="e"></param>        protected void Page_Load(object sender, EventArgs e)        {            if (!IsPostBack)            {                System.Drawing.Image img;                Bitmap temp = new Bitmap(1, 1);                temp.SetPixel(0, 0, Color.Black);                img = (System.Drawing.Image)temp;                int W = 300;                int H = 150;                b.Alignment = BarcodeLib.AlignmentPositions.CENTER;                b.Alignment = BarcodeLib.AlignmentPositions.CENTER;                BarcodeLib.TYPE type = BarcodeLib.TYPE.UNSPECIFIED;                type = BarcodeLib.TYPE.CODE128;                b.LabelPosition = BarcodeLib.LabelPositions.BOTTOMCENTER;                b.IncludeLabel = true;                b.RotateFlipType = (RotateFlipType)Enum.Parse(typeof(RotateFlipType), "RotateNoneFlipNone", true);                img = b.Encode(type, "00800900000011", Color.Black, Color.White, W, H);                string filename = "geovindu.jpg";                string file = Server.MapPath(filename);                img.Save(file);                this.Image1.ImageUrl = filename;            }        }