IRONSOFTWAREHOME

Code Samples for QR Code Apps

C# VB PDF .NET : Barcode QuickstartBarcode Quickstart
using IronBarCode;
using System.Drawing;

// Reading a barcode is easy with IronBarcode!
var resultFromFile = BarcodeReader.Read(@"file/barcode.png"); // From a file
var resultFromBitMap = BarcodeReader.Read(new Bitmap("barcode.bmp")); // From a bitmap
var resultFromImage = BarcodeReader.Read(Image.FromFile("barcode.jpg")); // From an image file
var resultFromPdf = BarcodeReader.ReadPdf(@"file/mydocument.pdf"); // From PDF use ReadPdf

// To configure and fine-tune barcode reading, utilize the BarcodeReaderOptions class
var myOptionsExample = new BarcodeReaderOptions
{
    // Choose a reading speed from: Faster, Balanced, Detailed, ExtremeDetail
    // There is a tradeoff in performance as more detail is set
    Speed = ReadingSpeed.Balanced,

    // Reader will stop scanning once a single barcode is found (if set to true)
    ExpectMultipleBarcodes = true,

    // By default, all barcode formats are scanned for
    // Specifying a subset of barcode types to search for would improve performance
    ExpectBarcodeTypes = BarcodeEncoding.AllOneDimensional,

    // Utilize multiple threads to read barcodes from multiple images in parallel
    Multithreaded = true,

    // Maximum threads for parallelized barcode reading
    // Default is 4
    MaxParallelThreads = 2,

    // The area of each image frame in which to scan for barcodes
    // Specifying a crop area will significantly improve performance and avoid noisy parts of the image
    CropArea = new Rectangle(),

    // Special setting for Code39 barcodes
    // If a Code39 barcode is detected, try to read with both the base and extended ASCII character sets
    UseCode39ExtendedMode = true
};

// Read with the options applied
var results = BarcodeReader.Read("barcode.png", myOptionsExample);

// Create a barcode with one line of code
var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeWriterEncoding.EAN8);

// After creating a barcode, we may choose to resize
myBarcode.ResizeTo(400, 100);

// Save our newly-created barcode as an image
myBarcode.SaveAsImage("EAN8.jpeg");

// Get the barcode as an image for further processing
var myBarcodeImage = myBarcode.Image;
NuGet Downloads Badge
PM > Install-Package BarCode

IronBarcode supports various standard formats, from image files (jpeg, png, and jpg) to more programmatic formats where you would want to pass the variables around, such as a bitmap. Furthermore, it also supports external formats such as PDF, allowing IronBarcode to integrate seamlessly in any codebase, giving developers flexibility with file formats and variables.

Aside from being a barcode reader for all file formats, IronBarcode also doubles as a barcode generator that supports all standard encoding and formatting, such as the EAN8, Code128, and Code39. Setting the barcode generator up only takes two lines of code. With a low barrier of entry and plenty of customization options for developers, IronBarcode is the number one choice for all situations related to barcodes.

Barcode Reader and Barcode Generator in C#

  1. var myBarcode = BarcodeWriter.CreateBarcode("12345", BarcodeEncoding.EAN8);
  2. Image myBarcodeImage = myBarcode.ToImage();
  3. myBarcode.ResizeTo(400, 100);
  4. var resultFromFile = BarcodeReader.Read(@"file/barcode.png");
  5. var myOptionsExample = new BarcodeReaderOptions { /* Options */ };

Barcode Writer

We first import the necessary libraries such as IronBarCode and System.Drawing, and instantiate BarcodeWriter to create a barcode with the string value of 12345 with the format of EAN8. We then save the generated barcode as an image in the desired format. There are various options for this as IronBarcode supports creating the barcode as an Image as well as a Bitmap.

Advanced Barcode Writer

As seen from above, generating a barcode using IronBarcode requires only two lines of code and saving it as a file for later usage. IronBarcode further extends this by providing developers with a plethora of options to customize the barcode to match the situation.

We can use the ResizeTo method and pass in the height and width to resize the barcode image.

Barcode Reader

Like the above, we first instantiate BarcodeReader, pass the file path to the Read method, and save it as a variable to use later and manipulate the barcode object. There are specified methods for reading external formats such as PDF with ReadPdf; however, for general image formats and bitmaps, we would use Read.

BarcodeReaderOptions

IronBarcode allows developers to scan barcodes from standard file format. However, there are situations where the developers want to fine-tune the behavior of the BarcodeReaderOptions class, especially in cases where it is reading a batch of barcode files programmatically. This is where BarcodeReaderOptions comes in. IronBarcode lets you fully customize things such as the speed at which it reads with Speed, whether multiple barcodes are expected in the file with ExpectMultipleBarcodes, and what kind of barcodes they are with the property ExpectBarcodeTypes. This allows developers to run multiple threads to read barcodes from multiple images in parallel, as well as control the number of threads used when doing parallel reading.

These are just some of the properties that showcase the power of IronBarcode. For a complete list, please refer to the documentation here.

Learn to Create Barcodes with Our Detailed Guide! Read

Human Support Directly From Our Development Team

Whether it's product, integration or licensing queries, the Iron product development team is on hand to support all of your questions. Get in touch and start a dialog with Iron to make the most of our library in your project.

Finds Multiples QR Code Types

IronBarcode reads and generates the majority of barcode and QR standards including UPC A/E, EAN 8/13, Code 39, Code 93, Code 128, ITF, MSI, RSS 14/Expanded, Databar, CodaBar, QR, Styled QR, Data Matrix, MaxiCode, PDF417, Plessey, and Aztec. Results provide barcode data, type, page, text, and barcode image; ideal for archive or indexing systems.

Fast & Accurate Reading with Image Pre Processing

IronBarcode automatically pre processes barcode images to improve speed and accuracy. Correcting rotation, noise, distortion and skewing to read scans or live video frames. Multi core, multi thread ready for batch processing server applications. Automatically find one or multiple barcodes in single and multi page documents. Search for specific barcode types or document locations without the need for complex APIs.

Built for easy use in .NET Core, Standard & Framework Projects

Get started in minutes with a few lines of code. Built for the .NET as an easy to use single DLL; without dependencies; supporting 32 & 64 bit; in any .NET Language. Use in Web, Cloud, Desktop or Console Applications; supporting Mobile & Desktop devices.

You can download the software product from this link.

Write QR Codes to Multiple Formats

Save or Print to a file or stream, as PDF, JPG, TIFF, GIF, BMP, PNG, or HTML formats. Set colour, quality, rotation, size and text. Use the C# Barcode Programming toolbox along with IronPDF and IronOCR for a full .NET Document Library.

Supports:

  • .NET Core 2.0 and above
  • .NET Framework 4.0 and above support C#, VB, F#
  • Microsoft Visual Studio. .NET Development IDE Icon
  • NuGet Installer Support for Visual Studio
  • JetBrains ReSharper C# language assistant compatible
  • Microsoft Azure C# .NET  hosting platform compatible

Licensing & Pricing

Free community development licenses. Commercial licenses from $999.

View Full License Options

QR code Tutorials for C# & VB .NET

Tutorial + Code Examples Reading Barcodes in C# | .NET Tutorial
C#.NETBarcodeQR
Frank Walker .NET Product Developer

Read Barcodes & QRs | C# VB .NET Tutorial

See How Frank uses IronBarcode to Read Barcodes from Scans, Photos, & PDF documents inside his C# .NET Barcode Application...

View Frank's Barcode Reading Tutorial
Writing Barcode Tutorial + Code Examples in C# & VB.NET
C#.NETBarcode
Francesca Miller Junior .NET Engineer

Generating Barcode Images in C# or VB.NET

Francesca shares some tips and tricks for writing Barcodes to Images in C# or VB Applications. See how to write the barcodes and all the options available to you with IronBarcode...

See Francesca's Barcode Tutorial
Tutorial + Code Examples VB.NET PDF Creation and Editing | VB.NET & ASP.NET PDF
QR.NETC#VB
Jennifer Wright Application Architecture Lead

Tutorial for Writing QR codes in C# & VB .NET Applications

Jenny's Team use IronBarcode to write thousands of QRs per day. See their tutorial on getting the most out of IronBarcode...

QR Writing Tutorial from Jenny's Team

Thousands of developers use IronBarcode for...

Accounting and Finance Systems

  • # Receipts
  • # Reporting
  • # Invoice Printing
Add PDF Support to ASP.NET Accounting and Finance Systems

Business Digitization

  • # Documentation
  • # Ordering & Labelling
  • # Paper Replacement
C# Business Digitization Use Cases

Enterprise Content Management

  • # Content Production
  • # Document Management
  • # Content Distribution
.NET CMS PDF Support

Data and Reporting Applications

  • # Performance Tracking
  • # Trend Mapping
  • # Reports
C# PDF Reports
Join Them Today
Iron Software Enterprise .NET Component Developers
C# Library Developers

Thousands of corporations, governments, SMEs and developers alike trust Iron software products.

Iron's team have over 10 years experience in the .NET software component market.

Iron Customer Icon
Iron Customer Icon
Iron Customer Icon
Iron Customer Icon
Iron Customer Icon
Iron Customer Icon
Iron Customer Icon
Iron Customer Icon

Ready to Get Started?

Nuget Downloads 2,422,100Version:2026.9just released

Key in blue circle

Get your free 30-day Trial Key instantly.

Your trial license will be sent to your email address

No limitations. 100% unlocked. No credit card.

bullet_checkedNo credit card or account creation requiredNo limitations. 100% unlocked. No credit card.
  • Logo Aetna
  • Logo NASA
  • Logo GE
  • Logo Porsche
  • Logo USDA
  • Logo Qatar
Join Millions of Engineers who’ve tried IronPDF
Book your free Live Demo
Booking Badge

Trusted by Millions of Engineers Worldwide

Iron Software's customer logos
Get Your No-Obligation Consult
Complete the form below or email sales@ironsoftware.com
Your details will always be kept confidential.
Trusted by Millions of Engineers Worldwide
Iron Software's customer logos
Get your free 30-day Trial Key instantly.
No credit card or account creation required