String to base64 QR code image

Install following third-party plugin

PM> Install-Package QRCoder

 Create a new class called "QRCodeImageGenerator" and copy past the following code

// namespaces
namespace Client_DAL.Helper
{
    using QRCoder;
    using System;
    public static class QRCodeImageGenerator
    {
        public static string GetBase64QRCode(string imageText, out string errMsg)
        {
            var result = string.Empty;
            errMsg = string.Empty;
            try
            {
                QRCodeGenerator qrGenerator = new();
                QRCodeData qrCodeData = qrGenerator.CreateQrCode(imageText, QRCodeGenerator.ECCLevel.Q);
                PngByteQRCode qrCode = new(qrCodeData);
                byte[] qrCodeImage = qrCode.GetGraphic(20);
                result = $"data:image/png;base64,{Convert.ToBase64String(qrCodeImage)}";
            }
            catch (Exception ex)
            {
                errMsg = "Unable to generate QRCode";
            }
            return result;
        }
    }
}

call method like below

var qrCode = QRCodeImageGenerator.GetBase64QRCode(sometext, out string _);

 

Summary:

Convert string to QRCode Base64 image