我正在为我的工作构建一个应用程序，该应用程序使用QRCoder和C#（.net framework 4.7.2）创建一个QR Code。我如何将徽标放在中心位置？下面是控制器代码：我只需要把标志放在中间，星星.pnng就是标志。

QRCodeGenerator qrGenerator = new QRCodeGenerator();
            QRCodeData qrCodeData = qrGenerator.CreateQrCode(model.Url, 
         QRCodeGenerator.ECCLevel.Q);
            Bitmap bitmap = new Bitmap(@"~/images/star.png");
            Color clr = bitmap.GetPixel(0, 0);
            QRCode qrCode = new QRCode(qrCodeData);
            Bitmap qrCodeImage = qrCode.GetGraphic(20);
            string imgFile = ConvertToFile(qrCodeImage, model.ImageType, model.Url);
            ViewBag.image = imgFile;
            System.Web.HttpResponse response = System.Web.HttpContext.Current.Response;
            response.ClearContent();
            response.Clear();
            response.ContentType = "text/plain";
            response.AddHeader("Content-Disposition", "attachment; filename=" + NewFilename(imgFile) + ";");
            response.TransmitFile(imgFile);
            response.Flush();
            response.End();
            return View(BitmapToBytes(qrCodeImage));

以下是操作方法调用的其他方法：

private string GetFileName(string imgPath)
{
    string[] pathSplit = imgPath.Split('\\');
    return pathSplit[pathSplit.Length - 1];
}

private string GetTime()
{
    string time = DateTime.Now.ToString("HHmmssff");
    return time;
}

private static string ConvertToFile(Bitmap img, string ext, string url)
{
    SvgDocument doc;

    string filename = NameDownloadFile(url);
    //string pngFile = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\images\qrdemo.png";
    //string svgFile = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\images\output.svg";
    //string bmpFile = 
          @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\imagesqrdemosvg.bmp";
    string pngFile = $@"\\dmuweb1\e$\wwwroot\qrcodecreator\images\{filename}.png";
    string svgFile = $@"\\dmuweb1\e$\temp\{filename}.svg";
    string bmpFile = $@"\\dmuweb1\e$\temp\{filename}.bmp";
    //string dest = @"E:\temp\";
    string imgfile = "";
    if (ext == "PNG")
    {
        imgfile = pngFile;
        img.Save(pngFile, System.Drawing.Imaging.ImageFormat.Png);
    }
    else
    {
        imgfile = svgFile;
        if (System.IO.File.Exists(imgfile))
        {
            System.IO.File.Delete(imgfile);
        }
        //img.Save(bmpFile, System.Drawing.Imaging.ImageFormat.Bmp);
        QRCodeGenerator qrGenerator = new QRCodeGenerator();
        QRCodeData qrCodeData = qrGenerator.CreateQrCode(url, 
              QRCodeGenerator.ECCLevel.Q);
        SvgQRCode qrCode = new SvgQRCode(qrCodeData);
        string qrCodeAsSvg = qrCode.GetGraphic(20);
        string[] qrCodeAsSvgAr = { "cv" };
        qrCodeAsSvgAr[0] = qrCodeAsSvg;
        System.IO.File.WriteAllLines(imgfile, qrCodeAsSvgAr);
    }
    return imgfile;

}

private static string ConvertToFileOnBlur(Bitmap img, string ext)
{
    string pngFile = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\images\qrdemo.png";
    string svgFile = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\images\output.svg";
    string bmpFile = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\imagesqrdemosvg.bmp";
    string dest = @"C:\Projects\QRCodeCreatorApp\QRCodeCreator\images\";
    //string pngFile = @"\\dmuweb1\e$\wwwroot\qrcodecreator\images\qrdemo.png";
    //string svgFile = @"\\dmuweb1\e$\temp\output.svg";
    //string bmpFile = @"\\dmuweb1\e$\temp\qrdemosvg.bmp";
    string[] pngSplit = pngFile.Split('\\');
    string imgfile = "";
    if (ext == "PNG")
    {
        imgfile = pngFile;
        img.Save(pngFile, System.Drawing.Imaging.ImageFormat.Png);
    }
    else
    {
        imgfile = svgFile;
        img.Save(bmpFile, System.Drawing.Imaging.ImageFormat.Bmp);
        var converter = new GroupDocs.Conversion.Converter(bmpFile);
        var convertOptions = converter.GetPossibleConversions()["svg"].ConvertOptions;
        converter.Convert(svgFile, convertOptions);
    }

    return imgfile;
}
private static Byte[] BitmapToBytes(Bitmap img)
{
    using (MemoryStream stream = new MemoryStream())
    {
        img.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
        return stream.ToArray();
    }
}

• 谢谢-谢谢