// 完毕:
using System;
using System.IO;
using System.Drawing;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
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 phrase in a PDF document and
// highlight all those occurrences using the text markup squiggly underline annotation.
// To ensure that all occurrences of the phrase ("javascript framework") are found
// even if the words are separated by a line break, a regular expressions is used
// in the search string.
public class FindAndSquiggly
{
public int CreatePDF(Stream stream)
{
// Load the PDF:
var doc = new GcPdfDocument();
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "CompleteJavaScriptBook.pdf"));
doc.Load(fs);
// Find all occurrences of the phrase "javascript framework" using regex so that
// words separated by line breaks are found:
var ft = new FindTextParams("javascript\\s+framework", wholeWord: false, matchCase: false, regex: true);
var found = doc.FindText(ft, null);
// Add a text markup annotation to wavy underline each occurrence:
foreach (var f in found)
{
var markup = new TextMarkupAnnotation()
{
Page = doc.Pages[f.PageIndex],
MarkupType = TextMarkupType.Squiggly,
Color = Color.Magenta
};
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;
}
}
}