972107: Added Proper code for paginated TOC in PDF document

Bookmarks/Multi-PDF-merger-with-paginated-TOC/.NET/Multi-PDF-merger-with-paginated-TOC.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.36221.1 d17.14
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Multi-PDF-merger-with-paginated-TOC", "Multi-PDF-merger-with-paginated-TOC\Multi-PDF-merger-with-paginated-TOC.csproj", "{2DAE4BA6-7373-4CA1-8973-172FAC1350C8}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{2DAE4BA6-7373-4CA1-8973-172FAC1350C8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{2DAE4BA6-7373-4CA1-8973-172FAC1350C8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{2DAE4BA6-7373-4CA1-8973-172FAC1350C8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{2DAE4BA6-7373-4CA1-8973-172FAC1350C8}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {83C3C2C7-ADE1-4D8D-9CB9-310464C02705}
+	EndGlobalSection
+EndGlobal

Bookmarks/Multi-PDF-merger-with-paginated-TOC/.NET/Multi-PDF-merger-with-paginated-TOC/Multi-PDF-merger-with-paginated-TOC.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net8.0</TargetFramework>
+    <RootNamespace>Multi_PDF_merger_with_paginated_TOC</RootNamespace>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Syncfusion.Pdf.Net.Core" Version="*" />
+  </ItemGroup>
+
+</Project>

Bookmarks/Multi-PDF-merger-with-paginated-TOC/.NET/Multi-PDF-merger-with-paginated-TOC/Program.cs

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+using Syncfusion.Drawing;
+using Syncfusion.Pdf;
+using Syncfusion.Pdf.Graphics;
+using Syncfusion.Pdf.Interactive;
+using Syncfusion.Pdf.Parsing;
+class Program
+{
+    public static PdfDocument document;
+    public static PdfFont font;
+
+    static void Main(string[] args)
+    {
+        // Load the PDF documents
+        PdfLoadedDocument doc1 = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input1.pdf"));
+        PdfLoadedDocument doc2 = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input2.pdf"));
+        PdfLoadedDocument doc3 = new PdfLoadedDocument(Path.GetFullPath(@"Data/Input3.pdf"));
+        object[] documentsToMerge = { doc1, doc2, doc3 };
+
+        // Create a new PDF document
+        using (document = new PdfDocument())
+        {
+            document.PageSettings.Size = doc1.Pages[0].Graphics.Size;
+
+            // Add initial TOC page
+            PdfPage tocPage = document.Pages.Add();
+            font = new PdfStandardFont(PdfFontFamily.Helvetica, 10f);
+
+            // Draw TOC title
+            PdfStringFormat format = new PdfStringFormat(PdfTextAlignment.Center, PdfVerticalAlignment.Middle);
+            tocPage.Graphics.DrawString("Table Of Contents", font, PdfBrushes.Black,
+                new RectangleF(PointF.Empty, new SizeF(tocPage.Graphics.ClientSize.Width, 20)), format);
+
+            // Merge the loaded documents into the new document
+            PdfDocument.Merge(document, documentsToMerge);
+
+            // Initialize TOC entry layout
+            float currentY = 30;
+            int totalEntries = 30;
+            int pageOffset = 1;
+            // Generate TOC entries dynamically
+            for (int i = 0; i < totalEntries; i++)
+            {
+                // If current Y exceeds page height, add a new TOC page
+                if (currentY > tocPage.Graphics.ClientSize.Height - 50)
+                {
+                    int currentPageIndex = document.Pages.IndexOf(tocPage);
+                    tocPage = document.Pages.Add();
+                    document.Pages.Insert(currentPageIndex + 1, tocPage);
+                    currentY = 30;
+                }
+
+                // Calculate page index for bookmark
+                int pageIndex = Math.Min(document.Pages.Count - 1, pageOffset + i);
+
+                // Simulate long TOC entry title
+                string longTitle = $"Chapter {i + 1} - This is a very long table of contents entry designed to test how the text wrapping functionality behaves when the content exceeds the width of the page layout in the PDF document.";
+
+                // Add bookmark and TOC entry
+                currentY = AddBookmark(document.Pages[pageIndex], tocPage, longTitle, currentY);
+            }
+
+            // Save the final PDF
+            document.Save(Path.GetFullPath(@"Output/Output.pdf"));
+        }
+    }
+
+    // Adds a bookmark and corresponding TOC entry to the document.
+    private static float AddBookmark(PdfPage targetPage, PdfPage tocPage, string title, float currentY)
+    {
+        // Create bookmark
+        PdfBookmark bookmark = document.Bookmarks.Add(title);
+
+        // Add TOC entry and get updated Y position
+        float newY = AddTableOfContent(targetPage, tocPage, title, new PointF(0, currentY));
+
+        // Create named destination for navigation
+        PdfNamedDestination namedDestination = new PdfNamedDestination(title)
+        {
+            Destination = new PdfDestination(targetPage, new PointF(0, currentY))
+            {
+                Mode = PdfDestinationMode.FitToPage
+            }
+        };
+
+        document.NamedDestinationCollection.Add(namedDestination);
+        bookmark.NamedDestination = namedDestination;
+
+        return newY;
+    }
+
+    // Draws TOC entry text, page number, and adds clickable link annotation.
+    private static float AddTableOfContent(PdfPage targetPage, PdfPage tocPage, string title, PointF position)
+    {
+        float textWidth = tocPage.Graphics.ClientSize.Width - 60;
+        RectangleF textBounds = new RectangleF(position.X, position.Y, textWidth, 100);
+
+        // Draw TOC entry text
+        PdfTextElement textElement = new PdfTextElement(title, font, PdfBrushes.Blue);
+        PdfLayoutFormat layoutFormat = new PdfLayoutFormat
+        {
+            Break = PdfLayoutBreakType.FitPage,
+            Layout = PdfLayoutType.Paginate
+        };
+
+        PdfLayoutResult layoutResult = textElement.Draw(tocPage, textBounds, layoutFormat);
+
+        // Draw page number
+        string pageNumberText = (document.Pages.IndexOf(targetPage) + 1).ToString();
+        PdfTextElement pageNumberElement = new PdfTextElement(pageNumberText, font, PdfBrushes.Black);
+        pageNumberElement.Draw(tocPage, new PointF(tocPage.Graphics.ClientSize.Width - 40, position.Y));
+
+        // Add clickable link annotation
+        RectangleF bounds = layoutResult.Bounds;
+        bounds.Width = textWidth;
+
+        PdfDocumentLinkAnnotation linkAnnotation = new PdfDocumentLinkAnnotation(bounds)
+        {
+            AnnotationFlags = PdfAnnotationFlags.NoRotate,
+            Text = title,
+            Color = Color.Transparent,
+            Destination = new PdfDestination(targetPage),
+            Border = new PdfAnnotationBorder(0)
+        };
+
+        linkAnnotation.Destination.Location = position;
+        tocPage.Annotations.Add(linkAnnotation);
+
+        // Return updated Y position for next entry
+        return layoutResult.Bounds.Bottom + 10;
+    }
+}