ZXing生成二维码

    public byte[] GenBarCode(string Contents)
    {
        EncodingOptions options = new EncodingOptions();
        BarcodeWriter writer = null;
        options.Width = 50;
        options.Height = 50;
        writer = new BarcodeWriter();
        writer.Format = BarcodeFormat.QR_CODE;
        writer.Options = options;

        Bitmap bitmap = writer.Write(Contents);
        MemoryStream ms = new MemoryStream();
        bitmap.Save(ms, System.Drawing.Imaging.ImageFormat.Bmp);
        byte[] bytes = ms.GetBuffer();
        ms.Close();
        return bytes;
    }