TOC Generator Plugin for Aspose.PDF
How to Batch Add TOC to Multiple PDFs in .NET

How to Batch Add TOC to Multiple PDFs in .NET

Adding a Table of Contents (TOC) to PDFs enhances navigation, search, and professional polish. With Aspose.PDF.Plugin TocGenerator for .NET, you can automate TOC creation for entire document batches—perfect for publishing, IT operations, or academic workflows.

Batch TOC Creation: Loop Through PDFs 

using Aspose.Pdf.Plugins;
using System.IO;

string inputDir = @"C:\Docs\Input";
string outputDir = @"C:\Docs\TOC";
Directory.CreateDirectory(outputDir);

string[] pdfFiles = Directory.GetFiles(inputDir, "*.pdf");

foreach (var pdfFile in pdfFiles)
{
    string outFile = Path.Combine(outputDir, Path.GetFileName(pdfFile));
    var generator = new TocGenerator();
    var options = new TocOptions();
    options.AddInput(new FileDataSource(pdfFile));
    options.AddOutput(new FileDataSource(outFile));

    // Optional: Customize TOC (multi-level, custom titles)
    // options.Levels = 2; // For two-level TOCs
    // options.Title = "Table of Contents";

    generator.Process(options);
    Console.WriteLine($"TOC added: {outFile}");
}

Custom TOC Options & Multi-level Support

  • Multi-level TOC: Set Levels in TocOptions for subheadings or section hierarchies.
  • Custom Titles: Use the Title property for localized or branded TOC headings.
  • Styling: Customize TOC appearance via plugin options (font, color, etc.).

Use Cases

  • Publishers standardizing navigation in book/document sets
  • IT teams prepping reports for compliance/archiving
  • Educators enhancing course packs or lecture notes

Frequently Asked Questions

Q: Can I generate a custom TOC for each document? A: Yes—dynamically set TOC properties (title, levels, styling) based on each file’s content or metadata in your batch script.

Q: Are multi-level TOCs supported? A: Yes—set the Levels property to match the heading structure you want (e.g., chapters and sub-sections).

Q: Does this work on encrypted PDFs? A: Yes, as long as you provide the password via plugin options where required.

Pro Tip: Combine batch TOC addition with document merging (using the Merger plugin) for full publication automation.

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