c# 生成二维码

引用ZXing类库

实现功能:

1生成带有Logo二维码

2 将二维码绘制到图片上

3 图片上绘制文字

 

/// <summary>
        /// 生成带Logo的二维码
        /// </summary>
        /// <param name="text"></param>
        public void Generate3(string text, string logoPath, string yqPath)
        {
            //Logo 图片
            Bitmap logo = new Bitmap(logoPath);
            //构造二维码写码器
            MultiFormatWriter writer = new MultiFormatWriter();
            Dictionary<EncodeHintType, object> hint = new Dictionary<EncodeHintType, object>();
            hint.Add(EncodeHintType.CHARACTER_SET, "UTF-8");
            hint.Add(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
            hint.Add(EncodeHintType.MARGIN, 0);

            //生成二维码 
            BitMatrix bm = writer.encode(text, BarcodeFormat.QR_CODE, 150, 150, hint);
            BarcodeWriter barcodeWriter = new BarcodeWriter();
            Bitmap map = barcodeWriter.Write(bm);
           
            //获取二维码实际尺寸（去掉二维码两边空白后的实际尺寸）
            int[] rectangle = bm.getEnclosingRectangle();

            //计算插入图片的大小和位置
            int middleW = Math.Min((int)(rectangle[2] / 3.5), logo.Width);
            int middleH = Math.Min((int)(rectangle[3] / 3.5), logo.Height);
            int middleL = (map.Width - middleW) / 2;
            int middleT = (map.Height - middleH) / 2;

            //将img转换成bmp格式，否则后面无法创建Graphics对象
            Bitmap bmpimg = new Bitmap(map.Width, map.Height, PixelFormat.Format32bppArgb);
            using (Graphics g = Graphics.FromImage(bmpimg))
            {
                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
                g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
                g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
                g.DrawImage(map, 0, 0);
            }
            //将二维码插入图片
            Graphics myGraphic = Graphics.FromImage(bmpimg);
            //白底
            myGraphic.FillRectangle(Brushes.White, middleL, middleT, middleW, middleH);
            myGraphic.DrawImage(logo, middleL, middleT, middleW, middleH);
           
            //保存成图片
            bmpimg.Save(yqPath, ImageFormat.Jpeg);
        }

 

 public string CreateQrCode(string md5Str,string name,int sex)
        {
            string str = sex == 1? "先生":"女士";
            string logoPath = AppDomain.CurrentDomain.BaseDirectory + "/logo.png";
            string qrCodePath = path + DateTime.Now.ToString("yyyyMMddHHmmss") + ".jpg";
            string yqPath = AppDomain.CurrentDomain.BaseDirectory + "/yq2.jpg";
            string yqCardPath = path + TCommon.Md5(DateTime.Now.ToString("yyyyMMddHHmmss")) + ".jpg";
            if (Directory.Exists(path) == false)//如果不存在就创建file文件夹
            {
                Directory.CreateDirectory(path);
            }
            Generate3(md5Str,logoPath,qrCodePath);
            Image qrCodeImg = new Bitmap(qrCodePath);
            Image image = new Bitmap(yqPath);
            Graphics ig = Graphics.FromImage(image);
            Font font = new Font("Arial", 38,FontStyle.Bold); 
            Font font2 = new Font("STXINWEI", 38, FontStyle.Bold);
            Brush brush = System.Drawing.Brushes.Black;
            SizeF size = ig.MeasureString(name, font2);
            SizeF size2 = ig.MeasureString(str, font);
            ig.DrawString(name, font, brush, (720-size.Width-size2.Width) /2, 680);
            ig.DrawString(str, font, brush, (720 - size.Width - size2.Width) / 2 + size.Width, 680);
            ig.FillRectangle(Brushes.White, 280, 351, 160, 160);
            ig.DrawImage(qrCodeImg, 285, 356);
            image.Save(yqCardPath);
            return yqCardPath.Substring(2);
        }