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);

Imports IronBarCode

Private options As New BarcodeReaderOptions() With {
	.ImageFilters = New ImageFilterCollection() From {New AdaptiveThresholdFilter()},
	.AutoRotate = True
}

' Read barcode
Private results As BarcodeResults = 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);
}

Imports IronBarCode
Imports System

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

' Work with the results
For Each pageResult In results
	Dim Value As String = pageResult.Value
	Dim PageNum As Integer = pageResult.PageNumber
	Dim Img As System.Drawing.Bitmap = pageResult.BarcodeImage
	Dim BarcodeType As BarcodeEncoding = pageResult.BarcodeType
	Dim Binary() As Byte = pageResult.BinaryValue
	Console.WriteLine(pageResult.Value & " on page " & PageNum)
Next pageResult

using IronBarCode;

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

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

Imports IronBarCode

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

For Each pageResult In multiFrameResults
	'...
Next pageResult