Set PDF Barcode Reader Options

IronBarcode has a variety of options in the PdfBarcodeReaderOptions class to support customized and optimized reads for PDFs specifically. This will handle PDF passwords, choose which pages to scan, the DPI to parse the PDF in, and any additional scaling needed to improve the read quality.

// Import the IronBarcode library
using IronBarcode;
using System;
using System.Linq;

class Program
{
    static void Main()
    {
        // Define options for reading PDF barcodes
        var options = new PdfBarcodeReaderOptions
        {
            // Set the DPI for parsing the PDF
            Dpi = 300, 

            // Specify which pages of the PDF to scan
            PageNumbers = new[] { 1, 2, 3 },

            // Set any password required to open the PDF
            Password = "password123",

            // Specify scaling factor to improve read quality
            ScaleToX = 2,
            ScaleToY = 2,
        };

        // Load and read the barcodes from the specified PDF
        // The ReadPdfBarcodes method automatically decrypts with the given password
        var results = IronBarcode.BarcodeReader.ReadPdfBarcodes("sample.pdf", options);

        // Iterate through the decoded barcode results
        foreach (var result in results)
        {
            // Print barcode type and value to the console
            Console.WriteLine($"Barcode Type: {result.BarcodeType}");
            Console.WriteLine($"Barcode Value: {result.Text}");
        }
    }
}

// Import the IronBarcode library
using IronBarcode;
using System;
using System.Linq;

class Program
{
    static void Main()
    {
        // Define options for reading PDF barcodes
        var options = new PdfBarcodeReaderOptions
        {
            // Set the DPI for parsing the PDF
            Dpi = 300, 

            // Specify which pages of the PDF to scan
            PageNumbers = new[] { 1, 2, 3 },

            // Set any password required to open the PDF
            Password = "password123",

            // Specify scaling factor to improve read quality
            ScaleToX = 2,
            ScaleToY = 2,
        };

        // Load and read the barcodes from the specified PDF
        // The ReadPdfBarcodes method automatically decrypts with the given password
        var results = IronBarcode.BarcodeReader.ReadPdfBarcodes("sample.pdf", options);

        // Iterate through the decoded barcode results
        foreach (var result in results)
        {
            // Print barcode type and value to the console
            Console.WriteLine($"Barcode Type: {result.BarcodeType}");
            Console.WriteLine($"Barcode Value: {result.Text}");
        }
    }
}

' Import the IronBarcode library
Imports IronBarcode
Imports System
Imports System.Linq

Friend Class Program
	Shared Sub Main()
		' Define options for reading PDF barcodes
		Dim options = New PdfBarcodeReaderOptions With {
			.Dpi = 300,
			.PageNumbers = { 1, 2, 3 },
			.Password = "password123",
			.ScaleToX = 2,
			.ScaleToY = 2
		}

		' Load and read the barcodes from the specified PDF
		' The ReadPdfBarcodes method automatically decrypts with the given password
		Dim results = IronBarcode.BarcodeReader.ReadPdfBarcodes("sample.pdf", options)

		' Iterate through the decoded barcode results
		For Each result In results
			' Print barcode type and value to the console
			Console.WriteLine($"Barcode Type: {result.BarcodeType}")
			Console.WriteLine($"Barcode Value: {result.Text}")
		Next result
	End Sub
End Class

Explanation of the Code

1. Using Directives:

   • using IronBarcode; and using System; are used to include the necessary namespaces for utilizing IronBarcode functionalities and basic input/output operations in C#.

2. Main Class and Method:

   • The Program class contains the Main method, which serves as the entry point of the application.

3. Creating PdfBarcodeReaderOptions:

   • An instance of PdfBarcodeReaderOptions is created to set various options for PDF processing:
     • Dpi: Sets the resolution for PDF parsing. Higher DPI can improve barcode detection accuracy.
     • PageNumbers: Specifies the PDF pages that should be scanned. This can be customized to target specific pages.
     • Password: If the PDF is password-protected, the correct password can be provided using this option.
     • ScaleToX and ScaleToY: These options allow adjusting the scale of the PDF image to help in enhancing the barcode detection accuracy.

4. Reading Barcodes:

   • The ReadPdfBarcodes method is used to read and decode barcodes from the PDF file. It utilizes the options specified.
5. Iterating and Displaying Results:
   • A foreach loop iterates over the barcode results, displaying each barcode's type and value on the console.
   • This ensures that all detected barcodes from the specified pages are outputted for verification or further processing.