//// This code is part of Document Solutions for Word demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Linq;using System.Globalization;using GrapeCity.Documents.Word;using GrapeCity.Documents.Word.Fields;
namespace DsWordWeb.Demos{    // This sample shows how to insert a TOC (Table of Contents) field    // into an existing DOCX Word document.    public class AddTocToDocx    {        public GcWordDocument CreateDocx()        {            // Load an existing Word document that contains some heading paragraphs into a GcWordDocument:            var doc = new GcWordDocument();            doc.Load(Path.Combine("Resources", "WordDocs", "JsFrameworkExcerpt.docx"));
            // Create a TocFieldOptions instance that will be used to insert a TOC field            // into the loaded document. The TOC will be updated to show the document's            // Table of Contents based on heading paragraphs present in the original document:            var tocOpts = new TocFieldOptions(doc);            // Specify TOC options as needed:            tocOpts.EntryFormatting.CreateHyperlink = true;
            // The original document starts with the title page, followed by            // content with the first paragraph having the PageBreakBefore style on.            // Knowing that, we want to insert the TOC between the title page            // and the content that follows, so we look for the first paragraph            // with PageBreakBefore on, and insert the TOC before it:            var fo = new FindOptions(doc);            fo.FormattingOptions.ParagraphFormat.PageBreakBefore = true;            // Empty search pattern because we're looking for a style regardless of text:            var find = doc.Body.Find("", fo).FirstOrDefault();            Paragraph para;            if (find != null)            {                // We found the point between the title page and the content:                para = find.Range.ParentParagraph.GetRange().Paragraphs.Insert("Table of Contents", doc.Styles[BuiltInStyleId.TocHeading], InsertLocation.Before);                para = para.GetRange().Paragraphs.Insert(InsertLocation.After);            }            else            {                // Otherwise, just insert the TOC at the beginning of the document:                para = doc.Body.Paragraphs.Insert("Table of Contents", doc.Styles[BuiltInStyleId.TocHeading], InsertLocation.Start);            }
            // Add the TOC field with our options, and update it so that it shows the actual document contents:            para.AddComplexField(tocOpts).Update(new GrapeCity.Documents.Word.Layout.WordLayoutSettings()            {                FontCollection = Util.FontCollection,                 Culture = CultureInfo.GetCultureInfo("en-US")            });
            // Done:            return doc;        }    }}