A Comparison between IronBarcode and ZXing.NET

using IronBarCode;
using System;

// Read a barcode or QR code from an image
BarcodeResult Result = BarcodeReader.QuicklyReadOneBarcode("GetStarted.png");
if (Result != null && Result.Text == "https://ironsoftware.com/csharp/barcode/")
{
    Console.WriteLine("GetStarted was a success.  Read Value: " + Result.Text);
}

Imports IronBarCode
Imports System

' Read a barcode or QR code from an image
Private Result As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("GetStarted.png")
If Result IsNot Nothing AndAlso Result.Text = "https://ironsoftware.com/csharp/barcode/" Then
	Console.WriteLine("GetStarted was a success.  Read Value: " & Result.Text)
End If

using IronBarCode;
using System;
using System.Drawing;

// Multiple barcodes may be scanned up from a single document or image. A PDF document may also be used as the input image
PagedBarcodeResult[] PDFResults = BarcodeReader.ReadBarcodesFromPdf("MultipleBarcodes.pdf");

// Work with the results
foreach (var PageResult in PDFResults)
{
    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
Imports System.Drawing

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

' Work with the results
For Each PageResult In PDFResults
	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;
using System;

// Multi-frame TIFF and GIF images can also be scanned, and multiple threads will be used automatically in the background for improved performance
PagedBarcodeResult[] MultiFrameResults = BarcodeReader.ReadBarcodesFromMultiFrameTiff("Multiframe.tiff", BarcodeEncoding.Code128, BarcodeReader.BarcodeRotationCorrection.High, BarcodeReader.BarcodeImageCorrection.MediumCleanPixels);
foreach (var PageResult in MultiFrameResults)
{
    // Process each page result
}

Imports IronBarCode
Imports System

' Multi-frame TIFF and GIF images can also be scanned, and multiple threads will be used automatically in the background for improved performance
Private MultiFrameResults() As PagedBarcodeResult = BarcodeReader.ReadBarcodesFromMultiFrameTiff("Multiframe.tiff", BarcodeEncoding.Code128, BarcodeReader.BarcodeRotationCorrection.High, BarcodeReader.BarcodeImageCorrection.MediumCleanPixels)
For Each PageResult In MultiFrameResults
	' Process each page result
Next PageResult

using IronBarCode;
using System;

// PDF documents can also be scanned, and multiple threads will be used automatically in the background for improved performance
var ScanResults = BarcodeReader.ReadBarcodesFromPdf("Scan.pdf", BarcodeEncoding.All, BarcodeReader.BarcodeRotationCorrection.Low, BarcodeReader.BarcodeImageCorrection.LightlyCleanPixels);

// Work with the results
foreach (var PageResult in ScanResults)
{
    string Value = PageResult.Value;
    //...
}

Imports IronBarCode
Imports System

' PDF documents can also be scanned, and multiple threads will be used automatically in the background for improved performance
Private ScanResults = BarcodeReader.ReadBarcodesFromPdf("Scan.pdf", BarcodeEncoding.All, BarcodeReader.BarcodeRotationCorrection.Low, BarcodeReader.BarcodeImageCorrection.LightlyCleanPixels)

' Work with the results
For Each PageResult In ScanResults
	Dim Value As String = PageResult.Value
	'...
Next PageResult

using IronBarCode;

// Small or 'Thumbnail' barcode images are automatically detected by IronBarcode and corrected wherever possible even if they have much digital noise.
BarcodeResult SmallResult = BarcodeReader.QuicklyReadOneBarcode("ThumbnailOfBarcode.gif", BarcodeEncoding.Code128);

Imports IronBarCode

' Small or 'Thumbnail' barcode images are automatically detected by IronBarcode and corrected wherever possible even if they have much digital noise.
Private SmallResult As BarcodeResult = BarcodeReader.QuicklyReadOneBarcode("ThumbnailOfBarcode.gif", BarcodeEncoding.Code128)

using IronBarCode;
using System;
using System.Drawing;

// All BarcodeResult.Read methods provide the developer with control to correct image and photograph correction and straightening rotation and perspective from skewed images
// * RotationCorrection   e.g BarcodeReader.BarcodeRotationCorrection.Extreme un-rotates and removes perspective from barcode images.
// * ImageCorrection      e.g BarcodeReader.BarcodeImageCorrection.DeepCleanPixels separates barcodes from background imagery and digital noise.
// * BarcodeEncoding      e.g. BarcodeEncoding.Code128,  Setting a specific Barcode format improves speed and reduces the risk of false positive results

// Example with a photo image
var PhotoResult = BarcodeReader.ReadASingleBarcode("Photo.png", BarcodeEncoding.Code128, BarcodeReader.BarcodeRotationCorrection.Medium, BarcodeReader.BarcodeImageCorrection.DeepCleanPixels);
string Value = PhotoResult.Value;
System.Drawing.Bitmap Img = PhotoResult.BarcodeImage;
BarcodeEncoding BarcodeType = PhotoResult.BarcodeType;
byte[] Binary = PhotoResult.BinaryValue;
Console.WriteLine(PhotoResult.Value);

Imports IronBarCode
Imports System
Imports System.Drawing

' All BarcodeResult.Read methods provide the developer with control to correct image and photograph correction and straightening rotation and perspective from skewed images
' * RotationCorrection   e.g BarcodeReader.BarcodeRotationCorrection.Extreme un-rotates and removes perspective from barcode images.
' * ImageCorrection      e.g BarcodeReader.BarcodeImageCorrection.DeepCleanPixels separates barcodes from background imagery and digital noise.
' * BarcodeEncoding      e.g. BarcodeEncoding.Code128,  Setting a specific Barcode format improves speed and reduces the risk of false positive results

' Example with a photo image
Private PhotoResult = BarcodeReader.ReadASingleBarcode("Photo.png", BarcodeEncoding.Code128, BarcodeReader.BarcodeRotationCorrection.Medium, BarcodeReader.BarcodeImageCorrection.DeepCleanPixels)
Private Value As String = PhotoResult.Value
Private Img As System.Drawing.Bitmap = PhotoResult.BarcodeImage
Private BarcodeType As BarcodeEncoding = PhotoResult.BarcodeType
Private Binary() As Byte = PhotoResult.BinaryValue
Console.WriteLine(PhotoResult.Value)

using IronBarCode;

// The BarcodeResult.ReadBarcodesMultiThreaded method allows for faster barcode scanning of multiple images or PDFs. All threads are automatically managed by IronBarcode.
var ListOfDocuments = new[] { "Image1.png", "image2.JPG", "image3.pdf" };
PagedBarcodeResult[] BatchResults = BarcodeReader.ReadBarcodesMultiThreaded(ListOfDocuments);

// Work with the results
foreach (var Result in BatchResults)
{
    string Value = Result.Value;
    //...
}

Imports IronBarCode

' The BarcodeResult.ReadBarcodesMultiThreaded method allows for faster barcode scanning of multiple images or PDFs. All threads are automatically managed by IronBarcode.
Private ListOfDocuments = { "Image1.png", "image2.JPG", "image3.pdf" }
Private BatchResults() As PagedBarcodeResult = BarcodeReader.ReadBarcodesMultiThreaded(ListOfDocuments)

' Work with the results
For Each Result In BatchResults
	Dim Value As String = Result.Value
	'...
Next Result

public ActionResult ViewFile()
{
    List<KeyValuePair<string, string>> fileData = new List<KeyValuePair<string, string>>();
    KeyValuePair<string, string> data;

    string[] files = Directory.GetFiles(Server.MapPath("~/qrr"));
    foreach (string file in files)
    {
        // Create a barcode reader instance
        IBarcodeReader reader = new BarcodeReader();

        // Load a bitmap
        var barcodeBitmap = (Bitmap)Image.FromFile(Server.MapPath("~/qrr") + "/" + Path.GetFileName(file));

        // Detect and decode the barcode inside the bitmap
        var result = reader.Decode(barcodeBitmap);

        // Do something with the result
        data = new KeyValuePair<string, string>(result.ToString(), "/QR/" + Path.GetFileName(file));
        fileData.Add(data);
    }
    return View(fileData);
}

Public Function ViewFile() As ActionResult
	Dim fileData As New List(Of KeyValuePair(Of String, String))()
	Dim data As KeyValuePair(Of String, String)

	Dim files() As String = Directory.GetFiles(Server.MapPath("~/qrr"))
	For Each file As String In files
		' Create a barcode reader instance
		Dim reader As IBarcodeReader = New BarcodeReader()

		' Load a bitmap
		Dim barcodeBitmap = CType(Image.FromFile(Server.MapPath("~/qrr") & "/" & Path.GetFileName(file)), Bitmap)

		' Detect and decode the barcode inside the bitmap
		Dim result = reader.Decode(barcodeBitmap)

		' Do something with the result
		data = New KeyValuePair(Of String, String)(result.ToString(), "/QR/" & Path.GetFileName(file))
		fileData.Add(data)
	Next file
	Return View(fileData)
End Function

using ZXing;
using System.Drawing;

// Create a barcode reader instance
BarcodeReader reader = new BarcodeReader();

// Load a bitmap
var barcodeBitmap = (Bitmap)Image.FromFile("C:\\sample-barcode-image.png");

// Detect and decode the barcode inside the bitmap
var result = reader.Decode(barcodeBitmap);

// Do something with the result
if (result != null)
{
    txtDecoderType.Text = result.BarcodeFormat.ToString();
    txtDecoderContent.Text = result.Text;
}

Imports ZXing
Imports System.Drawing

' Create a barcode reader instance
Private reader As New BarcodeReader()

' Load a bitmap
Private barcodeBitmap = CType(Image.FromFile("C:\sample-barcode-image.png"), Bitmap)

' Detect and decode the barcode inside the bitmap
Private result = reader.Decode(barcodeBitmap)

' Do something with the result
If result IsNot Nothing Then
	txtDecoderType.Text = result.BarcodeFormat.ToString()
	txtDecoderContent.Text = result.Text
End If