C#生成二维码（打印）

 private Bitmap GenByZXingNet(string msg)
        {
            BarcodeWriter writer = new BarcodeWriter();
            writer.Format = BarcodeFormat.QR_CODE;
            writer.Options.Hints.Add(EncodeHintType.CHARACTER_SET, "UTF-8");//编码问题
            writer.Options.Hints.Add(EncodeHintType.ERROR_CORRECTION, ZXing.QrCode.Internal.ErrorCorrectionLevel.H);
            const int codeSizeInPixels = 120;   //设置图片长宽
            writer.Options.Height = writer.Options.Width = codeSizeInPixels;
            writer.Options.Margin = 0;//设置边框
            ZXing.Common.BitMatrix bm = writer.Encode(msg);
            Bitmap img = writer.Write(bm);
            //img.Save(DateTime.Now.ToString("yyyyMMddhhmmss") ".jpg");
            pictureBox1.Image = img;
            return img;
        }