How to Read PDF Documents in C# using iTextSharp:

Handling PDFs is a common task in C# development, from extracting text to modifying documents. iText 7 has long been a go-to library for this, but its complex syntax and steep learning curve can slow down development.

IronPDF offers a simpler, more efficient alternative. With an intuitive API, built-in HTML-to-PDF conversion, and easier text extraction, IronPDF streamlines PDF handling with less code. In this article, we’ll compare iText 7 and IronPDF, demonstrating why IronPDF is the smarter choice for C# developers.

Understanding iText 7: An Overview

iText 7 (originally iTextSharp) is a powerful open-source library for working with PDFs in .NET. It provides expansive functions for creating, modifying, encrypting, and extracting content from PDF documents. Many developers rely on it for automating document workflows, generating reports, and handling large-scale PDF processing tasks.

One of iText 7’s biggest strengths is its fine-grained control over PDF structures. It supports annotations, form fields, watermarks, and digital signatures, making it a robust tool for advanced document manipulation. Additionally, it’s well-documented and widely used, with robust community support and numerous third-party resources available.

Installing iText 7

To install iText 7 in a .NET project, you can use the NuGet Package Manager in Visual Studio:

Using the NuGet Package Manager Console:

Install-Package itext7

However, iText 7 comes with challenges. Its complex API requires more code for common tasks like text extraction or merging PDFs and lacks built-in support for HTML-to-PDF conversion, making web-to-document workflows more difficult. Additionally, its AGPL licensing requires businesses to purchase a commercial license to avoid open-source distribution requirements.

For developers seeking a more streamlined, high-level API with modern features, IronPDF presents a compelling alternative.

Introducing IronPDF: A Superior Solution

IronPDF is a .NET library designed to make PDF extraction, manipulation, and generation simple and efficient. Unlike iText 7, which requires extensive coding for many operations, IronPDF allows developers to read, edit, and modify PDFs with minimal effort.

For PDF extraction, IronPDF makes it easy to pull text, images, and structured data from PDFs with just a few lines of code, making it easy to streamline your text extraction tasks with ease. When it comes to PDF manipulation, IronPDF supports merging, splitting, watermarking, and editing PDFs without requiring complex low-level operations.

Additionally, IronPDF includes native HTML-to-PDF conversion, making it simple to generate PDFs from web pages or existing HTML content. It also supports JavaScript rendering, digital signatures, and encryption, providing a well-rounded toolkit for modern applications.

With a cleaner API, better documentation, and commercial support, IronPDF is a developer-friendly alternative that simplifies PDF handling in C#. In the following sections, we’ll compare how both libraries handle key PDF tasks and why IronPDF offers a better experience for C# developers.

Installation

To get IronPDF up and running in your C# projects, it's as easy as running the following line in the NuGet Package Manager:

Install-Package IronPdf

Or, alternatively, go to Tools > NuGet Package Manager > Manage NuGet Packages for Solution, and search for IronPDF.

Then, simply click “Install” and IronPDF will be added to your project in no time!

IronPDF vs iText 7 in PDF Processing: Code Comparison

Using IronPDF to Extract Text

IronPDF simplifies PDF text extraction, manipulation, and reading with a much more developer-friendly API. Unlike iText 7, which requires low-level operations, IronPDF allows text extraction in just a few lines of code.

To demonstrate IronPDF’s powerful text extraction tool in action, I will take the following PDF document and extract the content from within it.

Code Example

using IronPdf;

class Program
{
    static void Main()
    {
        string pdfPath = "sample.pdf";

        // Load the PDF document
        var pdf = new PdfDocument(pdfPath);

        // Extract all text from the loaded PDF document
        string extractedText = pdf.ExtractAllText();

        // Output the extracted text to the console
        Console.WriteLine(extractedText);
    }
}

using IronPdf;

class Program
{
    static void Main()
    {
        string pdfPath = "sample.pdf";

        // Load the PDF document
        var pdf = new PdfDocument(pdfPath);

        // Extract all text from the loaded PDF document
        string extractedText = pdf.ExtractAllText();

        // Output the extracted text to the console
        Console.WriteLine(extractedText);
    }
}

Imports IronPdf

Friend Class Program
	Shared Sub Main()
		Dim pdfPath As String = "sample.pdf"

		' Load the PDF document
		Dim pdf = New PdfDocument(pdfPath)

		' Extract all text from the loaded PDF document
		Dim extractedText As String = pdf.ExtractAllText()

		' Output the extracted text to the console
		Console.WriteLine(extractedText)
	End Sub
End Class

Output

Explanation:

IronPDF simplifies PDF text extraction with its high-level API, eliminating the need for low-level operations. In just a few lines of code, IronPDF can efficiently extract all text from a PDF document, unlike libraries like iText 7, which often require manual page iteration and complex handling.

In the example, the PdfDocument class loads the PDF and the ExtractAllText() method quickly extracts all text, streamlining the process. This is a major advantage over iText 7, where you would need to manually handle individual pages and text elements.

Expanding on IronPDF for Other Tasks:

Building on the basic text extraction example, IronPDF's high-level API simplifies other common PDF tasks, all while maintaining ease of use and efficiency:

Extracting Text from Specific Pages: If you need to extract text from a specific page or range, IronPDF allows you to do this easily. For example, to extract text from the first page:

var pdf = new PdfDocument("sample.pdf");

// Access text from the first page
string pageText = pdf.Pages[0].Text;

Console.WriteLine(pageText);

var pdf = new PdfDocument("sample.pdf");

// Access text from the first page
string pageText = pdf.Pages[0].Text;

Console.WriteLine(pageText);

Dim pdf = New PdfDocument("sample.pdf")

' Access text from the first page
Dim pageText As String = pdf.Pages(0).Text

Console.WriteLine(pageText)

PDF Manipulation: After extracting text or data from multiple PDFs, you might want to combine them into one document. IronPDF makes merging multiple PDFs simple:

var pdf1 = new PdfDocument("file1.pdf");
var pdf2 = new PdfDocument("file2.pdf");

// Merge the PDFs into a single document
var combinedPdf = PdfDocument.Merge(pdf1, pdf2);

combinedPdf.SaveAs("combined_output.pdf");

var pdf1 = new PdfDocument("file1.pdf");
var pdf2 = new PdfDocument("file2.pdf");

// Merge the PDFs into a single document
var combinedPdf = PdfDocument.Merge(pdf1, pdf2);

combinedPdf.SaveAs("combined_output.pdf");

Dim pdf1 = New PdfDocument("file1.pdf")
Dim pdf2 = New PdfDocument("file2.pdf")

' Merge the PDFs into a single document
Dim combinedPdf = PdfDocument.Merge(pdf1, pdf2)

combinedPdf.SaveAs("combined_output.pdf")

PDF to HTML Conversion: If you need to convert a PDF back into HTML for further extraction or manipulation, IronPDF provides this functionality as well:

var pdf = new PdfDocument("sample.pdf");

// Convert the PDF to an HTML string
string htmlContent = pdf.ToHtmlString();

var pdf = new PdfDocument("sample.pdf");

// Convert the PDF to an HTML string
string htmlContent = pdf.ToHtmlString();

Dim pdf = New PdfDocument("sample.pdf")

' Convert the PDF to an HTML string
Dim htmlContent As String = pdf.ToHtmlString()

With IronPDF, text extraction is just the beginning. The library’s simple, powerful API extends to a wide range of PDF manipulation tasks, all in a format that’s intuitive and easy to integrate into your workflow.

Reading PDFs with iText 7

iText 7 requires working with PDF readers, streams, and byte-level data processing. Extracting text is not straightforward, as it involves iterating through PDF pages and handling various structures manually. For this code example, we will be using the same PDF document as we did in the IronPDF section.

using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Canvas.Parser;

class Program
{
    static void Main()
    {
        string pdfPath = "sample.pdf";
        string extractedText = ExtractTextFromPdf(pdfPath);
        Console.WriteLine(extractedText);
    }

    // Method to extract text from a PDF
    static string ExtractTextFromPdf(string pdfPath)
    {
        // Use PdfReader to load the PDF
        using (PdfReader reader = new PdfReader(pdfPath))
        // Open the PDF document for processing
        using (iText.Kernel.Pdf.PdfDocument pdfDoc = new iText.Kernel.Pdf.PdfDocument(reader))
        {
            string text = "";
            // Iterate through each page and extract text
            for (int i = 1; i <= pdfDoc.GetNumberOfPages(); i++)
            {
                text += PdfTextExtractor.GetTextFromPage(pdfDoc.GetPage(i)) + Environment.NewLine;
            }
            return text;
        }
    }
}

using iText.Kernel.Pdf;
using iText.Kernel.Pdf.Canvas.Parser;

class Program
{
    static void Main()
    {
        string pdfPath = "sample.pdf";
        string extractedText = ExtractTextFromPdf(pdfPath);
        Console.WriteLine(extractedText);
    }

    // Method to extract text from a PDF
    static string ExtractTextFromPdf(string pdfPath)
    {
        // Use PdfReader to load the PDF
        using (PdfReader reader = new PdfReader(pdfPath))
        // Open the PDF document for processing
        using (iText.Kernel.Pdf.PdfDocument pdfDoc = new iText.Kernel.Pdf.PdfDocument(reader))
        {
            string text = "";
            // Iterate through each page and extract text
            for (int i = 1; i <= pdfDoc.GetNumberOfPages(); i++)
            {
                text += PdfTextExtractor.GetTextFromPage(pdfDoc.GetPage(i)) + Environment.NewLine;
            }
            return text;
        }
    }
}

Imports iText.Kernel.Pdf
Imports iText.Kernel.Pdf.Canvas.Parser

Friend Class Program
	Shared Sub Main()
		Dim pdfPath As String = "sample.pdf"
		Dim extractedText As String = ExtractTextFromPdf(pdfPath)
		Console.WriteLine(extractedText)
	End Sub

	' Method to extract text from a PDF
	Private Shared Function ExtractTextFromPdf(ByVal pdfPath As String) As String
		' Use PdfReader to load the PDF
		Using reader As New PdfReader(pdfPath)
		' Open the PDF document for processing
		Using pdfDoc As New iText.Kernel.Pdf.PdfDocument(reader)
			Dim text As String = ""
			' Iterate through each page and extract text
			Dim i As Integer = 1
			Do While i <= pdfDoc.GetNumberOfPages()
				text &= PdfTextExtractor.GetTextFromPage(pdfDoc.GetPage(i)) & Environment.NewLine
				i += 1
			Loop
			Return text
		End Using
		End Using
	End Function
End Class

Output

Explanation:

• The PdfReader loads the PDF file for reading.
• The PdfDocument object allows iterating through pages.
• PdfTextExtractor.GetTextFromPage() retrieves text from each page.
• The final text is stored in a string and displayed.

This method works but requires manual iteration and can be cumbersome for structured documents or scanned PDFs.

Comparing iText 7 and IronPDF

While iText 7 requires detailed coding to perform PDF operations, IronPDF streamlines these tasks with straightforward methods. For instance, extracting text from a PDF with iText 7 involves multiple steps and extensive code, whereas IronPDF accomplishes this in just a few lines. Additionally, IronPDF's support for HTML to PDF conversion is more robust, handling complex HTML, CSS, and JavaScript seamlessly.

Key Takeaways

• IronPDF simplifies PDF reading and manipulation tasks with a more intuitive and streamlined API, requiring less code to perform common operations.
• IronPDF's text extraction is easier to implement compared to iTextSharp’s more complex iteration process, saving developers time.
• IronPDF’s perpetual licensing is more business-friendly, offering fewer restrictions compared to iTextSharp’s AGPL license.
• IronPDF has better documentation that’s more accessible for quick troubleshooting, making it ideal for developers who want fast solutions without sifting through excessive resources.

Optimizing Your Workflow with IronPDF

IronPDF offers a suite of powerful features that go beyond just PDF reading. These features make it a robust solution for developers looking to optimize their PDF workflows. Here's how IronPDF can enhance your development process:

1. Text Extraction from PDFs

IronPDF allows for easy extraction of text from PDF files, making it ideal for workflows that involve document analysis, data extraction, or content indexing. With IronPDF, you can quickly pull text from PDFs and use it in your applications without dealing with complex parsing.

2. PDF Creation

IronPDF makes it simple to generate PDFs from scratch, whether you're creating reports, invoices, or other types of documents. The tool also supports HTML to PDF conversion, allowing you to leverage existing web content and generate well-formatted PDFs. This is perfect for scenarios where you need to convert web pages or dynamic HTML content into downloadable PDF files.

3. Advanced PDF Features

Beyond basic text extraction and PDF creation, IronPDF supports advanced features such as filling out PDF forms, adding annotations, and manipulating document content. These capabilities are useful in industries like legal, financial, or education where forms and feedback are a regular part of the workflow.

4. Batch Processing

IronPDF is well-suited for processing large numbers of PDF files. Whether you're extracting information from hundreds of documents or converting multiple HTML files to PDFs, IronPDF can automate these tasks and handle them efficiently, saving both time and effort.

5. Automation and Efficiency

IronPDF simplifies PDF manipulation tasks that are often time-consuming and repetitive. By automating tasks like PDF text extraction, form filling, or batch conversion, developers can focus on more complex aspects of their projects while letting IronPDF handle the heavy lifting.

Technical Support and Community Resources

To ensure developers can make the most of IronPDF, the tool is backed by strong support and community resources:

• Technical Support: IronPDF offers direct support through email and a ticketing system, providing assistance for any implementation or technical challenges.
• Community Resources: The IronPDF website includes extensive documentation, tutorials, and blog posts. Developers can also find solutions and share knowledge via GitHub and Stack Overflow, where the community actively discusses best practices and troubleshooting tips.

Conclusion

In this article, we've explored the capabilities of IronPDF as a powerful, user-friendly PDF handling library for .NET developers. We compared it to iText 7, highlighting how IronPDF simplifies complex tasks such as text extraction and PDF manipulation. IronPDF’s clean API and advanced features, including editing, watermarking, and digital signatures, make it a superior solution for modern PDF workflows.

Unlike iText 7, which requires intricate coding for common PDF tasks, IronPDF allows you to perform complex operations with minimal code, saving developers time and effort. Whether you’re working with scanned documents, generating PDFs from HTML, or adding custom watermarks, IronPDF offers an intuitive and efficient way to handle it all.

If you're looking to streamline your PDF workflows and increase productivity in your C# projects, IronPDF is the ideal choice.

We invite you to download IronPDF and try it for yourself. With a free trial available, you can experience firsthand how easy it is to integrate IronPDF into your applications and start benefiting from its powerful features today.

Click below to get started with your free trial:

• Start your free trial with IronPDF
• Learn more about IronPDF's features and pricing Don’t wait – unlock the potential of seamless PDF handling with IronPDF!