Nerdbank.QRCodes

Features

• Decode a QR code from a high quality render or a photo with a QR code somewhere in the image.
• Encode data in a QR code (using the excellent QRCoder library) supporting several graphic formats (some Windows only) and even as ASCII art.

Usage

Create a QR code

There are lots of options for customizing QR codes including style, image in the center, colors, and output image format. Following is a basic example.

using QRCoder; QREncoder encoder = new(); QRCodeGenerator generator = new(); QRCodeData data = generator.CreateQrCode("https://some.url", encoder.ECCLevel); encoder.Encode(data, "some.png", traceSource: null);

Decode a QR code

Decoding a QR code is very straightforward.

using Bitmap bitmap = (Bitmap)Image.FromFile("some.jpg"); if (QRDecoder.TryDecode(bitmap, out string? data)) { Console.WriteLine(data); }