C# PDF Parser

Advanced Text Extraction Examples

Here are additional ways to parse PDF content using IronPDF:

using IronPdf;

// Parse PDF from URL
var pdfFromUrl = PdfDocument.FromUrl("https://example.com/document.pdf");
string urlPdfText = pdfFromUrl.ExtractAllText();

// Parse password-protected PDFs
var protectedPdf = PdfDocument.FromFile("protected.pdf", "password123");
string protectedText = protectedPdf.ExtractAllText();

// Extract text from specific page range
var largePdf = PdfDocument.FromFile("large-document.pdf");
for (int i = 5; i < 10; i++)
{
    string pageText = largePdf.ExtractTextFromPage(i);
    Console.WriteLine($"Page {i + 1}: {pageText.Substring(0, 100)}...");
}

using IronPdf;

// Parse PDF from URL
var pdfFromUrl = PdfDocument.FromUrl("https://example.com/document.pdf");
string urlPdfText = pdfFromUrl.ExtractAllText();

// Parse password-protected PDFs
var protectedPdf = PdfDocument.FromFile("protected.pdf", "password123");
string protectedText = protectedPdf.ExtractAllText();

// Extract text from specific page range
var largePdf = PdfDocument.FromFile("large-document.pdf");
for (int i = 5; i < 10; i++)
{
    string pageText = largePdf.ExtractTextFromPage(i);
    Console.WriteLine($"Page {i + 1}: {pageText.Substring(0, 100)}...");
}

These examples demonstrate IronPDF's flexibility when handling different PDF sources and scenarios. For complex parsing needs, explore PDF DOM object access to work with structured content.

Handling Different PDF Types

IronPDF excels at parsing various PDF types:

using IronPdf;
using System.Text.RegularExpressions;

// Parse scanned PDFs with OCR (requires IronOcr)
var scannedPdf = PdfDocument.FromFile("scanned-document.pdf");
string ocrText = scannedPdf.ExtractAllText();

// Parse PDFs with forms
var formPdf = PdfDocument.FromFile("form.pdf");
string formText = formPdf.ExtractAllText();

// Extract and filter specific content
string invoiceText = pdf.ExtractAllText();
var invoiceNumber = Regex.Match(invoiceText, @"Invoice #: (\d+)").Groups[1].Value;
var totalAmount = Regex.Match(invoiceText, @"Total: \$([0-9,]+\.\d{2})").Groups[1].Value;

using IronPdf;
using System.Text.RegularExpressions;

// Parse scanned PDFs with OCR (requires IronOcr)
var scannedPdf = PdfDocument.FromFile("scanned-document.pdf");
string ocrText = scannedPdf.ExtractAllText();

// Parse PDFs with forms
var formPdf = PdfDocument.FromFile("form.pdf");
string formText = formPdf.ExtractAllText();

// Extract and filter specific content
string invoiceText = pdf.ExtractAllText();
var invoiceNumber = Regex.Match(invoiceText, @"Invoice #: (\d+)").Groups[1].Value;
var totalAmount = Regex.Match(invoiceText, @"Total: \$([0-9,]+\.\d{2})").Groups[1].Value;

How Do I View the Parsed PDF Content?

A C# Form displays the parsed PDF content from the code execution above. This output provides the exact text from a PDF for document processing needs.

~ PDF ~

~ C# Form ~

The extracted text maintains the original formatting and structure from the PDF, making it ideal for data processing, content analysis, or migration tasks. Process this text further by finding and replacing specific content or exporting it to other formats.

Integrating PDF Parsing into Your Applications

IronPDF's parsing capabilities integrate into various application types:

// ASP.NET Core example
public IActionResult ParseUploadedPdf(IFormFile pdfFile)
{
    using var stream = pdfFile.OpenReadStream();
    var pdf = PdfDocument.FromStream(stream);

    var extractedText = pdf.ExtractAllText();

    // Process or store the extracted text
    return Json(new { 
        success = true, 
        textLength = extractedText.Length,
        preview = extractedText.Substring(0, Math.Min(500, extractedText.Length))
    });
}

// Console application example
static void BatchParsePdfs(string folderPath)
{
    var pdfFiles = Directory.GetFiles(folderPath, "*.pdf");

    foreach (var file in pdfFiles)
    {
        var pdf = PdfDocument.FromFile(file);
        var text = pdf.ExtractAllText();

        // Save extracted text
        var textFile = Path.ChangeExtension(file, ".txt");
        File.WriteAllText(textFile, text);

        Console.WriteLine($"Parsed: {Path.GetFileName(file)} - {text.Length} characters");
    }
}

// ASP.NET Core example
public IActionResult ParseUploadedPdf(IFormFile pdfFile)
{
    using var stream = pdfFile.OpenReadStream();
    var pdf = PdfDocument.FromStream(stream);

    var extractedText = pdf.ExtractAllText();

    // Process or store the extracted text
    return Json(new { 
        success = true, 
        textLength = extractedText.Length,
        preview = extractedText.Substring(0, Math.Min(500, extractedText.Length))
    });
}

// Console application example
static void BatchParsePdfs(string folderPath)
{
    var pdfFiles = Directory.GetFiles(folderPath, "*.pdf");

    foreach (var file in pdfFiles)
    {
        var pdf = PdfDocument.FromFile(file);
        var text = pdf.ExtractAllText();

        // Save extracted text
        var textFile = Path.ChangeExtension(file, ".txt");
        File.WriteAllText(textFile, text);

        Console.WriteLine($"Parsed: {Path.GetFileName(file)} - {text.Length} characters");
    }
}

These examples show PDF parsing incorporation into web applications and batch processing scenarios. For advanced implementations, explore async and multithreading techniques to improve performance when processing multiple PDFs.

Library Quick Access

Documentation

Read the API Reference for documentation on IronPDF and all its functionality.

Documentation

Ready to see what else you can do? Check out our tutorial page here: Edit PDFs