Как создать расширенное оглавление (TOC) в документе Word с использованием C# и .NET

using System;
using System.Linq;
using SautinSoft.Document;

namespace Example
{
    class Sample
    {
        static void Main(string[] args)
        {
            // Get your free 30-day key here:   
            // https://sautinsoft.com/start-for-free/

            ExtendedTOC();
        }

        /// <summary>
        /// Create extended table of contents in word document.
        /// </summary>
        /// <remarks>
        /// Details: https://sautinsoft.com/products/document/help/net/developer-guide/create-extended-table-of-contents-in-word-document-net-csharp-vb.php
        /// </remarks> 
        public static void ExtendedTOC()
        {
            string resultFile = "Extended-Table-Of-Contents.docx";
            // First of all, create an instance of DocumentCore.
            DocumentCore dc = new DocumentCore();

            // Create and add Heading1 style. For "Chapter 1" and "Chapter 2".
            ParagraphStyle Heading1Style = (ParagraphStyle)Style.CreateStyle(StyleTemplateType.Heading1, dc);
            Heading1Style.ParagraphFormat.LineSpacing = 3;
            Heading1Style.CharacterFormat.Size = 18;
            // #358CCB - blue
            Heading1Style.CharacterFormat.FontColor = new Color("#358CCB");
            dc.Styles.Add(Heading1Style);

            // Create and add Heading2 style. For "SupChapter 1-1" and "SubChapter 2-1".
            ParagraphStyle Heading2Style = (ParagraphStyle)Style.CreateStyle(StyleTemplateType.Heading2, dc);
            Heading2Style.ParagraphFormat.LineSpacing = 2;
            Heading2Style.CharacterFormat.Size = 14;
            // #FF9900 - orange
            Heading2Style.CharacterFormat.FontColor = new Color("#FF9900");
            dc.Styles.Add(Heading2Style);

            // Create and add TOC style.
            ParagraphStyle TOCStyle = (ParagraphStyle)Style.CreateStyle(StyleTemplateType.Subtitle, dc);
            TOCStyle.ParagraphFormat.OutlineLevel = OutlineLevel.BodyText;
            TOCStyle.ParagraphFormat.Alignment = HorizontalAlignment.Center;
            TOCStyle.CharacterFormat.Bold = true;
            // #358CCB - blue
            TOCStyle.CharacterFormat.FontColor = new Color("#358CCB");
            dc.Styles.Add(TOCStyle);

            // Add new section.
            Section section = new Section(dc);
            dc.Sections.Add(section);

            // Add TOC Header.
            section.Blocks.Add(
                new Paragraph(dc, "Table of Contents")
                { ParagraphFormat = { Style = TOCStyle } });

            // Create and add TOC (Table of Contents).
            section.Blocks.Add(new TableOfEntries(dc, FieldType.TOC));

            // Add TOC Ending.
            section.Blocks.Add(
                 new Paragraph(dc, "The End")
                 { ParagraphFormat = { Alignment = HorizontalAlignment.Center, BackgroundColor = Color.Gray } });

            // Add the document content (Chapter 1).
            // Add Chapter 1.
            section.Blocks.Add(
                new Paragraph(dc, "Chapter 1")
                {
                    ParagraphFormat =
                    {
                Style = Heading1Style,
                PageBreakBefore=true
                    }
                });

            // Add SubChapter 1-1.
            section.Blocks.Add(
                        new Paragraph(dc, String.Format("Subchapter 1-1"))
                        {
                            ParagraphFormat =
                            {
                    Style = Heading2Style
                            }
                        });

            // Add the content of Chapter 1 / Subchapter 1-1.
            section.Blocks.Add(
                        new Paragraph(dc,
                            "�Document.Net� will help you in development of applications which operates with DOCX, RTF, PDF, HTML and Text documents.After adding of the reference to(SautinSoft.Document.dll) - it's 100% C# managed assembly you will be able to create a new document, parse an existing, modify anything what you want.")
                        {
                            ParagraphFormat = new ParagraphFormat
                            {
                                LeftIndentation = 10,
                                RightIndentation = 10,
                                SpecialIndentation = 20,
                                LineSpacing = 20,
                                LineSpacingRule = LineSpacingRule.Exactly,
                                SpaceBefore = 20,
                                SpaceAfter = 20
                            }
                        });

            // Let's add another page break into.
            section.Blocks.Add(
                   new Paragraph(dc,
                   new SpecialCharacter(dc, SpecialCharacterType.PageBreak)));

            // Add the document content (Chapter 2).
            // Add Chapter 2.
            section.Blocks.Add(
                     new Paragraph(dc, "Chapter 2")
                     {
                         ParagraphFormat =
                         {
                Style = Heading1Style
                         }
                     });

            // Add SubChapter 2-1.
            section.Blocks.Add(
                new Paragraph(dc, String.Format("Subchapter 2-1"))
                {
                    ParagraphFormat =
                    {
                    Style = Heading2Style
                    }
                });

            // Add the content of Chapter 2 / Subchapter 2-1.
            section.Blocks.Add(
                        new Paragraph(dc,
                            "Requires only .Net 4.0 or above. Our product is compatible with all .Net languages and supports all Operating Systems where .Net Framework can be used. Note that �Document .Net� is entirely written in managed C#, which makes it absolutely standalone and an independent library. Of course, No dependency on Microsoft Word.")
                        {
                            ParagraphFormat = new ParagraphFormat
                            {
                                LeftIndentation = 10,
                                RightIndentation = 10,
                                SpecialIndentation = 20,
                                LineSpacing = 20,
                                LineSpacingRule = LineSpacingRule.Exactly,
                                SpaceBefore = 20,
                                SpaceAfter = 20
                            }
                        });

            // Update TOC (TOC can be updated only after all document content is added).
            var tableofcontents = (TableOfEntries)dc.GetChildElements(true, ElementType.TableOfEntries).FirstOrDefault();
            tableofcontents.Update();

            // Apply the style for the TOC.
            foreach (Paragraph par in tableofcontents.Entries)
            {
                par.ParagraphFormat.Style = TOCStyle;
            }

            // Update TOC's page numbers.
            // Page numbers are automatically updated in that case.
            dc.GetPaginator(new PaginatorOptions() { UpdateFields = true });

            // Save the document as DOCX file.
            dc.Save(resultFile);

            // Open the result for demonstration purposes.
            System.Diagnostics.Process.Start(new System.Diagnostics.ProcessStartInfo(resultFile) { UseShellExecute = true });
        }
    }
}

Download