C# Barcode Scanner: Read Barcodes & QR Codes in .NET Applications

using IronBarCode;

BarcodeReaderOptions options = new BarcodeReaderOptions()
{
    // Choose which filters are to be applied (in order)
    ImageFilters = new ImageFilterCollection() {
        new AdaptiveThresholdFilter(),
    },

    // Uses machine learning to auto rotate the barcode
    AutoRotate = true,
};

// Read barcode
BarcodeResults results = BarcodeReader.Read("TryHarderQR.png", options);

using IronBarCode;

BarcodeReaderOptions options = new BarcodeReaderOptions()
{
    // Choose which filters are to be applied (in order)
    ImageFilters = new ImageFilterCollection() {
        new AdaptiveThresholdFilter(),
    },

    // Uses machine learning to auto rotate the barcode
    AutoRotate = true,
};

// Read barcode
BarcodeResults results = BarcodeReader.Read("TryHarderQR.png", options);

using IronBarCode;
using System;

// Multiple barcodes may be scanned up from a single document or image. A PDF document may also used as the input image
BarcodeResults results = BarcodeReader.ReadPdf("MultipleBarcodes.pdf");

// Work with the results
foreach (var pageResult in results)
{
    string Value = pageResult.Value;
    int PageNum = pageResult.PageNumber;
    System.Drawing.Bitmap Img = pageResult.BarcodeImage;
    BarcodeEncoding BarcodeType = pageResult.BarcodeType;
    byte[] Binary = pageResult.BinaryValue;
    Console.WriteLine(pageResult.Value + " on page " + PageNum);
}

using IronBarCode;
using System;

// Multiple barcodes may be scanned up from a single document or image. A PDF document may also used as the input image
BarcodeResults results = BarcodeReader.ReadPdf("MultipleBarcodes.pdf");

// Work with the results
foreach (var pageResult in results)
{
    string Value = pageResult.Value;
    int PageNum = pageResult.PageNumber;
    System.Drawing.Bitmap Img = pageResult.BarcodeImage;
    BarcodeEncoding BarcodeType = pageResult.BarcodeType;
    byte[] Binary = pageResult.BinaryValue;
    Console.WriteLine(pageResult.Value + " on page " + PageNum);
}

using IronBarCode;

// Multi frame TIFF and GIF images can also be scanned
BarcodeResults multiFrameResults = BarcodeReader.Read("Multiframe.tiff");

foreach (var pageResult in multiFrameResults)
{
    //...
}

using IronBarCode;

// Multi frame TIFF and GIF images can also be scanned
BarcodeResults multiFrameResults = BarcodeReader.Read("Multiframe.tiff");

foreach (var pageResult in multiFrameResults)
{
    //...
}

using IronBarCode;

// The Multithreaded property allows for faster barcode scanning across multiple images or PDFs. All threads are automatically managed by IronBarCode.
var ListOfDocuments = new[] { "image1.png", "image2.JPG", "image3.pdf" };

BarcodeReaderOptions options = new BarcodeReaderOptions()
{
    // Enable multithreading
    Multithreaded = true,
};

BarcodeResults batchResults = BarcodeReader.Read(ListOfDocuments, options);

using IronBarCode;

// The Multithreaded property allows for faster barcode scanning across multiple images or PDFs. All threads are automatically managed by IronBarCode.
var ListOfDocuments = new[] { "image1.png", "image2.JPG", "image3.pdf" };

BarcodeReaderOptions options = new BarcodeReaderOptions()
{
    // Enable multithreading
    Multithreaded = true,
};

BarcodeResults batchResults = BarcodeReader.Read(ListOfDocuments, options);

using IronBarCode;

// TIFF files are processed similarly to regular images
// Each frame is scanned automatically
BarcodeResults multiFrameResults = BarcodeReader.Read("Multiframe.tiff");

foreach (var result in multiFrameResults)
{
    // Access frame-specific information
    int frameNumber = result.PageNumber; // Frame number in TIFF
    string barcodeValue = result.Text;
    
    Console.WriteLine($"Frame {frameNumber}: {barcodeValue}");
    
    // Save individual barcode images if needed
    result.BarcodeImage?.Save($"barcode_frame_{frameNumber}.png");
}

using IronBarCode;

// TIFF files are processed similarly to regular images
// Each frame is scanned automatically
BarcodeResults multiFrameResults = BarcodeReader.Read("Multiframe.tiff");

foreach (var result in multiFrameResults)
{
    // Access frame-specific information
    int frameNumber = result.PageNumber; // Frame number in TIFF
    string barcodeValue = result.Text;
    
    Console.WriteLine($"Frame {frameNumber}: {barcodeValue}");
    
    // Save individual barcode images if needed
    result.BarcodeImage?.Save($"barcode_frame_{frameNumber}.png");
}