//// This code is part of Document Solutions for PDF .NET demos.// Copyright (c) MESCIUS inc. All rights reserved.//using System.IO;using System.Drawing;using GrapeCity.Documents.Pdf;using GrapeCity.Documents.Pdf.Annotations;using System.Collections.Generic;using GrapeCity.Documents.Common;
namespace DsPdfWeb.Demos{    // This example shows how to find all occurrences of a word in a PDF document    // and highlight all those occurrences using the text markup highlight annotation.    // This example creates a text markup annotation per occurrence. A different approach    // illustrated in MarkupPerPage is to create a text markup annotation per page.    //    // The PDF used in this example was downloaded from https://www.frontiersin.org/articles/10.3389/fendo.2022.1005722/full.    public class FindAndHighlight    {        public int CreatePDF(Stream stream)        {            // Load the PDF:            var doc = new GcPdfDocument();            using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "fendo-13-1005722.pdf"));            doc.Load(fs);
            // Find all occurrences of the word "childbirths":            var found = doc.FindText(new FindTextParams("childbirths", true, false), null);
            // Add a text markup annotation to highlight each occurrence:            foreach (var f in found)            {                var markup = new TextMarkupAnnotation()                {                    Page = doc.Pages[f.PageIndex],                    MarkupType = TextMarkupType.Highlight,                    Color = Color.Yellow                };                List<Quadrilateral> area = new List<Quadrilateral>();                foreach (var b in f.Bounds)                    area.Add(b);                markup.Area = area;            }
            // Done:            doc.Save(stream);            return doc.Pages.Count;        }    }}