Aspose.Pdf可以帮助开发人员在创建PDF或者为存在的PDF文件添加TOC目录，控件提供的 Aspose.Pdf.Generator空间下的ListSection类可以用于创建TOC目录，并且控件还可以设置TOC目录结构的样式，以及线条的样式等，具体如何创建TOC目录可以参考下面的详细代码：

// For complete examples and data files, please go to https://github.com/aspose-pdf/Aspose.Pdf-for-.NET

// The path to the documents directory.

string dataDir = RunExamples.GetDataDir_AsposePdf_WorkingDocuments();

 

// Load an existing PDF files

Document doc = new Document(dataDir + "AddTOC.pdf");

 

// Get access to first page of PDF file

Page tocPage = doc.Pages.Insert(1);

 

// Create object to represent TOC information

TocInfo tocInfo = new TocInfo();

TextFragment title = new TextFragment("Table Of Contents");

title.TextState.FontSize = 20;

title.TextState.FontStyle = FontStyles.Bold;

 

// Set the title for TOC

tocInfo.Title = title;

tocPage.TocInfo = tocInfo;

 

// Create string objects which will be used as TOC elements

string[] titles = new string[4];

titles[0] = "First page";

titles[1] = "Second page";

titles[2] = "Third page";

titles[3] = "Fourth page";

for (int i = 0; i < 2; i++)

{

    // Create Heading object

    Aspose.Pdf.Heading heading2 = new Aspose.Pdf.Heading(1);

    TextSegment segment2 = new TextSegment();

    heading2.TocPage = tocPage;

    heading2.Segments.Add(segment2);

 

    // Specify the destination page for heading object

    heading2.DestinationPage = doc.Pages[i + 2];

 

    // Destination page

    heading2.Top = doc.Pages[i + 2].Rect.Height;

 

    // Destination coordinate

    segment2.Text = titles[i];

 

    // Add heading to page containing TOC

    tocPage.Paragraphs.Add(heading2);

}

dataDir = dataDir + "TOC_out_.pdf";

// Save the updated document

doc.Save(dataDir);