//
// This code is part of Document Solutions for PDF demos.
// Copyright (c) MESCIUS inc. All rights reserved.
//
using System;
using System.IO;
using System.Drawing;
using GrapeCity.Documents.Common;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
namespace DsPdfWeb.Demos
{
// This sample loads the PDF file created by the BalancedColumns sample,
// finds all occurrences of the words 'lorem' and 'ipsum' in the loaded document,
// and highlights these two words using different colors.
public class FindText
{
public int CreatePDF(Stream stream)
{
// The original file stream must be kept open while working with the loaded PDF, see LoadPDF for details:
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "BalancedColumns.pdf"));
var doc = new GcPdfDocument();
doc.Load(fs);
// Find all 'lorem', using case-insensitive word search:
var findsLorem = doc.FindText(
new FindTextParams("lorem", true, false),
OutputRange.All);
// Ditto for 'ipsum':
var findsIpsum = doc.FindText(
new FindTextParams("ipsum", true, false),
OutputRange.All);
// Highlight all 'lorem' using semi-transparent orange red:
foreach (var find in findsLorem)
foreach (var ql in find.Bounds)
doc.Pages[find.PageIndex].Graphics.FillPolygon(ql, Color.FromArgb(100, Color.OrangeRed));
// Put a violet red border around all 'ipsum':
foreach (var find in findsIpsum)
foreach (var ql in find.Bounds)
doc.Pages[find.PageIndex].Graphics.DrawPolygon(ql, Color.MediumVioletRed);
// Done:
doc.Save(stream);
return doc.Pages.Count;
}
}
}