How to insert logo in QR code using asp.net and C#

mohaammed talha

5y8.1k.NET

QR Code Successfully generated but i need to create QR Code with logo .

protected void btnGenerate_Click(object sender, EventArgs e)
{
string code = txtName.Text;
if (!string.IsNullOrEmpty(code))
{
string[] commaSeparatedItems = txtName.Text.Split(',');
var Empcd = string.Concat("'", string.Join("','", commaSeparatedItems), "'");
foreach (var i in commaSeparatedItems) {
QRCodeGenerator qrGenerator = new QRCodeGenerator();
QRCodeGenerator.QRCode qrCode = qrGenerator.CreateQrCode(i , QRCodeGenerator.ECCLevel.Q);
System.Web.UI.WebControls.Image imgBarCode = new System.Web.UI.WebControls.Image();
imgBarCode.Height = 150;
imgBarCode.Width = 150;
using (Bitmap bitMap = qrCode.GetGraphic(20))
{
using (MemoryStream ms = new MemoryStream())
{
bitMap.Save(ms, System.Drawing.Imaging.ImageFormat.Png);
byte[] byteImage = ms.ToArray();
File.WriteAllBytes(Server.MapPath("QRCodes/" + code + ".png"), byteImage);
imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
// imgBarCode.ImageUrl = "data:image/png;base64," + Convert.ToBase64String(byteImage);
}
plBarCode.Controls.Add(imgBarCode);
//BindGrid();
load();
}
}
}

3 Replies

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Harsh Shah5y ago
Please refer to the below links...

https://ironsoftware.com/csharp/barcode/tutorials/csharp-qr-code-generator/

https://foxlearn.com/windows-forms/generate-qr-code-with-logo-in-csharp-390.html
Marvin Reid5y ago
You can add a logo inside a barcode by using the CombineFastCommand provided through the LEADTOOLS SDK. This will allow you to combine a created barcode with a separate image represented by your logo. You can create a QR barcode and add a logo by building off this code:
QRBarcodeData _QRBarcode = new QRBarcodeData();
_QRBarcode.Value = BarcodeData.Text;
_QRWriteOpt = _barcodeWriter.GetDefaultOptions(BarcodeSymbology.QR) as QRBarcodeWriteOptions;
_QRWriteOpt.XModule = 50;

_barcodeWriter.CalculateBarcodeDataBounds(LeadRect.Empty, 200, 200, _QRBarcode, _QRWriteOpt);
LeadRect _imgBounds = new LeadRect(200, 200, 200, 200); // can be changed

using (RasterImage _image = RasterImage.Create(_imgBounds.Width, _imgBounds.Height, 24, 200, RasterColor.White))
{
   _barcodeWriter.WriteBarcode(_image, _QRBarcode, _QRWriteOpt);
   if (BarcodeLogo.Text != "")
   {
      using (RasterCodecs _codecs = new RasterCodecs())
      {
         //80 represents the upper + lower and the left + right padding.
         //The padding is caused by the _QRWriteOpt.XModule option.
         int _logoWidth = (int)((_image.Width - 80) * numericUpDown1.Value / 100);
         int _logoHeight = (int)((_image.Height - 80) * numericUpDown1.Value / 100);
         using (RasterImage _logoImg = _codecs.Load(BarcodeLogo.Text, _logoWidth, _logoHeight, 24, RasterSizeFlags.Bicubic, CodecsLoadByteOrder.Bgr))
         {
            CalcLogoPos(_image.Width, _image.Height, _logoImg.Width, _logoImg.Height);
            CombineFastCommand _cmd = new CombineFastCommand(_image, LogoPos, new LeadPoint(0, 0), CombineFastCommandFlags.Destination0 | CombineFastCommandFlags.OperationAdd);
            if (TranspBkg.Checked)
            {
               RasterColor transpColor = _logoImg.GetPixelColor(0, 0);
               _logoImg.AddColorToRegion(transpColor, RasterRegionCombineMode.SetNot);
            }
            _cmd.Run(_logoImg);
         }
      }
   }
}
https://www.leadtools.com/help/sdk/v21/dh/l/imageprocessing-combinefastcommand.html
https://www.leadtools.com/blog/document-imaging/barcode/qr-code-logo-generator-developer-app-series/
Sagar Pardeshi5y ago
Hi,

Follow the below URL .Helpful to you

https://www.e-iceblue.com/Knowledgebase/Spire.Barcode/Program-Guide/Add-a-Logo-to-QR-Code-in-C.html