decoding qr code by c#

vishwajeet chauhan

7y12.6kVisual Basic .NET

// The QRDecoder converts byte array to text string the class using this conversion

public static string ByteArrayToStr(byte[] DataArray) {
Decoder = Encoding.UTF8.GetDecoder();
int CharCount = Decoder.GetCharCount(DataArray, 0, DataArray.Length);
char[] CharArray = new char[CharCount];
Decoder.GetChars(DataArray, 0, DataArray.Length, CharArray, 0);
return new string(CharArray);
}

it is converting byte to string ...can anyone tell me how is it working

5 Replies

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Maen Badwan7y ago
You can load the image that contains the QR barcode and read it using the BarcodeReader class from LEADTOOLS.
The following code shows how you can do this using LEADTOOLS .NET classes:
using (RasterCodecs _codecs = new RasterCodecs())
{
using (RasterImage image = _codecs.Load(@"c:\QRImage.tif"))
{
   BarcodeEngine engine = new BarcodeEngine();
   BarcodeReader reader = engine.Reader;
   BarcodeData[] barcode = reader.ReadBarcodes(image, LeadRect.Empty, 5, new BarcodeSymbology[] { BarcodeSymbology.QR });
   if (barcode != null)
      Console.WriteLine("Data:{0}, Found at location {1}", barcode[0].Value, barcode[0].Bounds);
}
}
For more information, see this link:
https://www.leadtools.com/help/leadtools/v20/dh/ba/barcodereader.html

Also, you can use the .NET cloud services from LEADTOOLS to extract (read) barcodes from images. For details see this link:
https://services.leadtools.com/documentation/tutorials
Sonu Gupta7y ago
Hi,

May be this article helpful for you..

https://www.codeguru.com/csharp/.net/net_asp/dynamically-generating-qr-codes-in-c.html
Amit Kumar7y ago
Hi, Go to below link and read carefully your problem will resolve your problem because this article all about QR Code. https://www.codeproject.com/Articles/1250071/QR-Code-Encoder-and-Decoder-NET-Framework-Standard
Rajanikant Hawaldar7y ago
Hi Dear, go through this links https://docs.microsoft.com/en-us/dotnet/api/system.text.utf8encoding.getdecoder?view=netframework-4.8 https://docs.microsoft.com/en-us/dotnet/api/system.text.decoder?view=netframework-4.8 Thanks
Sapna Girish7y ago
I used free Spire.Barcode to read QR code data.
string data = Spire.Barcode.BarcodeScanner.ScanOne("QR.png",
Spire.Barcode.BarCodeType.QRCode);
More info: https://www.e-iceblue.com/Introduce/barcode-for-net-introduce.html