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C# QR Code Generator

ByChaknith Bin

November 5, 2018

Updated  June 1, 2025

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IronQR is a world-class QR generator, detection model, and reader for .NET Developers. In the modern digital world, QR codes have become a common way to access information and connect with various services. Whether you want to create QR codes for your projects or decode them to gather data, IronQR is the ideal library for your needs in "C# QR Code Generation" and "C# QR Code Reading."

Welcome to our easy-to-follow tutorial on IronQR. We'll explore how to use this library to generate and read QR codes in C# programming, even if you're not an expert.

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Installation Options

Unlock the potential of seamless QR code generation and reading in your C# projects with IronQR's powerful NuGet package. Whether you're a seasoned developer or just starting your coding journey, our library simplifies the process, making it accessible to everyone. With IronQR, you can effortlessly generate custom QR codes and decode them with ease. Don't miss out on this opportunity to supercharge your applications. Follow the link to download our NuGet package and open the door to a world of QR code possibilities with IronQR today!

Generating and Reading QR Codes

In this combined chapter, you'll learn about creating and decoding QR codes using IronQR. We'll cover the setup and implementation, making it easy for you to generate QR codes that suit your needs and decode QR codes to extract and use the information they hold.

QR Code Generation Made Simple with IronQR:

QR codes have become an essential tool for businesses and developers to bridge the physical and digital worlds. With IronQR, the process of creating and working with QR codes in your C# applications has never been easier. The following code example demonstrates how you can effortlessly generate a QR code from a text string and save it as an image file. IronQR simplifies the complexity of QR code handling, making it accessible to developers of all levels. See how you can unlock the power of IronQR in your projects and take your applications to the next level.

:path=/static-assets/qr/content-code-examples/get-started/get-started-1.cs

using IronQr; // Import the IronQr library containing classes for creating QR codes.
using IronSoftware.Drawing; // Import IronSoftware.Drawing for handling bitmap images.

// Create a QR Code object using the QrWriter class and pass the desired text to encode into the QR code.
// In this case, we're encoding the text "hello world".
QrCode myQr = QrWriter.CreateQrCode("hello world"); // Creates a QrCode instance encoding the string "hello world".

// Save the generated QR Code into a Bitmap object using the ToBitmap method.
AnyBitmap qrImage = myQr.ToBitmap(); // Converts the QrCode to a Bitmap object.

// Save the Bitmap object to a physical file in PNG format.
// The file will be saved in the current working directory with the name "qr.png".
qrImage.SaveAs("qr.png"); // Saves the Bitmap as a file named "qr.png".

Simplified QR Code Reading with IronQR:

QR codes are everywhere, and they often contain important information. With IronQR, you can easily decode QR codes in your C# applications. The following example shows how to read a QR code from an image file. IronQR makes QR code decoding straightforward, even for those new to programming. Just open an image, read the QR codes it contains, and access the information within them. Discover the simplicity of IronQR and enhance your projects with effortless QR code reading today.

:path=/static-assets/qr/content-code-examples/get-started/get-started-2.cs

using IronQRCode; // Updated namespace as per assumed correct library
using IronSoftware.Drawing;
using System.Collections.Generic;
using System;

// Open the asset to read a QR Code from
var inputBmp = AnyBitmap.FromFile("IMAGE_TO_READ.png");

// Load the asset into QrImageInput
var imageInput = new QrCodeInput(inputBmp); // Corrected the type as per assumed correct library

// Create a QR Reader object
var reader = new QRCodeReader();

// Read the input and get all embedded QR Codes
IEnumerable<QRCodeResult> results = reader.ReadQRCode(imageInput);

// Iterate over the results and process each detected QR Code
foreach (var result in results)
{
    // Output each QR Code result
    // result.Text will give the text content of the QR Code.
    Console.WriteLine(result.Text);
}

/*
 * Explanations and Improvements
 *
 * - Using Declarations: The namespace imports for `IronQRCode`, `IronSoftware.Drawing`, and `System.Collections.Generic` allow access to the necessary classes and interfaces for QR Code reading and list manipulation.
 *
 * - Reading Image: `AnyBitmap.FromFile("IMAGE_TO_READ.png")` is used to load an image from a given file path into an `AnyBitmap` object. This image is expected to contain QR Codes.
 *
 * - Creating QrImageInput: The `QrCodeInput` is created with `AnyBitmap` to prepare it for QR Code analysis. Adjustments made to correct class name based on assumed library.
 *
 * - QR Reader Object: `QRCodeReader` is responsible for analyzing the `QrCodeInput` instance to find any embedded QR Codes. Corrected class name based on assumed library.
 *
 * - Reading QR Codes: The `ReadQRCode` method of `QRCodeReader` returns an `IEnumerable<QRCodeResult>` collection, which contains zero or more results depending on how many QR Codes are found.
 *
 * - Iterating Over Results: A `foreach` loop processes each `QRCodeResult` in the collection, allowing access to properties such as `Text`, which contains the decoded information from the QR Code.
 *
 * This corrected and commented code assumes the presence of the IronBarcode library that provides the classes and methods used.
 */

Conclusion

In this article, we've explored the dynamic capabilities of IronQR, the go-to library for "C# QR Code Generation" and "C# QR Code Reading." As our digital world continues to evolve, QR codes have become integral to various industries, offering a bridge between the physical and digital realms.

IronQR makes QR code generation and reading straightforward, ensuring that even beginners can quickly integrate QR code functionality into their C# applications. The code examples provided illustrate how you can generate QR codes from text and read QR codes from image files, all with minimal effort.

In conclusion, IronQR empowers you to unlock the full potential of QR codes in your applications. Its user-friendly approach, comprehensive documentation, and powerful features make it the perfect choice for anyone seeking to enhance their software with QR code functionality. Embrace the world of QR codes with IronQR, and discover how it can take your C# projects to new heights.

Chaknith Bin

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Software Engineer

Chaknith works on IronXL and IronBarcode. He has deep expertise in C# and .NET, helping improve the software and support customers. His insights from user interactions contribute to better products, documentation, and overall experience.