//// This code is part of Document Solutions for Word demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.Linq;using System.Globalization;using GrapeCity.Documents.Word;using GrapeCity.Documents.Word.Fields;
namespace DsWordWeb.Demos{    // This sample shows how to add a TOC (Table of Contents) field to a Word document,    // and specify its options.    public class TocFieldOpts    {        public GcWordDocument CreateDocx()        {            var doc = new GcWordDocument();
            // The TocFieldOptions class provides a convenient strong-typed access            // to options specific to the 'TOC' MS Word field:            var tocOpts = new TocFieldOptions(doc);            tocOpts.EntryFormatting.CreateHyperlink = true;            // Include paragraphs formatted only with 'Heading 1', 'Heading 2' or 'Heading 3' styles:            foreach (TocStyleLevel style in tocOpts.Styles)            {                switch (style.Level)                {                    case OutlineLevel.Level1:                    case OutlineLevel.Level2:                    case OutlineLevel.Level3:                        style.Collect = true;                        break;                    default:                        style.Collect = false;                        break;                }            }
            // Add TOC and a section break to the document:            var toc = doc.Body.Paragraphs.Add().AddComplexField(tocOpts);            doc.Body.Paragraphs.Last().AddSectionBreak();
            // Front matter section: page numbers use lowercase roman numerals,            // restarting at "i". The TOC field correctly picks up each section's            // own PageNumbering settings when it renders page number entries, so            // "Preface" below will show up in the TOC with a roman-numeral page:            var frontMatterSection = doc.Body.Sections.Last;            frontMatterSection.PageSetup.PageNumbering.NumberStyle = NumberStyle.LowerRoman;            frontMatterSection.PageSetup.PageNumbering.RestartPageNumbering = true;            frontMatterSection.PageSetup.PageNumbering.StartingNumber = 1;
            doc.Body.AddParagraph("Preface", doc.Styles[BuiltInStyleId.Heading1]);            doc.Body.AddParagraph(Util.LoremIpsumPar());            doc.Body.AddParagraph().AddSectionBreak();
            // Another front-matter section using the same roman-numeral style, but            // *not* restarting the page count: it continues from "i" to "ii", making            // it clear this is still front matter, and that the page numbering only            // changes again -- back to arabic -- at the start of the body section:            var foreword = doc.Body.Sections.Last;            foreword.PageSetup.PageNumbering.NumberStyle = NumberStyle.LowerRoman;            foreword.PageSetup.PageNumbering.RestartPageNumbering = false;
            doc.Body.AddParagraph("Foreword", doc.Styles[BuiltInStyleId.Heading1]);            doc.Body.AddParagraph(Util.LoremIpsumPar());            doc.Body.AddParagraph().AddSectionBreak();
            // Body section: page numbers switch back to arabic numerals,            // restarting at 1, so the TOC's body entries show plain page numbers:            var bodySection = doc.Body.Sections.Last;            bodySection.PageSetup.PageNumbering.NumberStyle = NumberStyle.Decimal;            bodySection.PageSetup.PageNumbering.RestartPageNumbering = true;            bodySection.PageSetup.PageNumbering.StartingNumber = 1;
            // Create random content with 3 levels of headers:            var rnd = Util.NewRandom();            for (int i = 0; i < rnd.Next(2, 4); i++)            {                var p = doc.Body.AddParagraph($"This is top-level header {i + 1}", doc.Styles[BuiltInStyleId.Heading1]);                var par = Util.LoremIpsumPar();                doc.Body.AddParagraph(par);                for (int j = 0; j < rnd.Next(3, 5); j++)                {                    p = doc.Body.AddParagraph($"This is second-level header {j + 1}", doc.Styles[BuiltInStyleId.Heading2]);                    par = Util.LoremIpsumPar();                    doc.Body.AddParagraph(par);                    for (int k = 0; k < rnd.Next(2, 3); k++)                    {                        p = doc.Body.AddParagraph($"This is third-level header {k + 1}", doc.Styles[BuiltInStyleId.Heading3]);                        par = Util.LoremIpsumPar();                        doc.Body.AddParagraph(par);                    }                }            }
            // For reference add a simple page header with page number to the document:            var phdr = doc.Body.Sections.First.Headers[HeaderFooterType.Primary].Body.AddParagraph(doc.Styles[BuiltInStyleId.Closing]);            phdr.AddComplexField(new PageFieldOptions(doc) { NumberFormat = "'Page '0" });
            // Update fields using a specific culture:            doc.UpdateFields(new GrapeCity.Documents.Word.Layout.WordLayoutSettings() { FontCollection = Util.FontCollection, Culture = CultureInfo.GetCultureInfo("en-US") });
            // Done:            return doc;        }    }}