// 完毕:
using System;
using System.IO;
using System.Drawing;
using GrapeCity.Documents.Pdf;
using GrapeCity.Documents.Text;
using GrapeCity.Documents.Pdf.Annotations;
namespace DsPdfWeb.Demos
{
// This example shows how to create a caret annotation used to indicate a specific position in a text.
public class AddCaretAnnotation
{
public int CreatePDF(Stream stream)
{
using var fs = File.OpenRead(Path.Combine("Resources", "PDFs", "Wetlands.pdf"));
var doc = new GcPdfDocument();
doc.Load(fs);
foreach (var page in doc.Pages)
{
var tm = page.GetTextMap();
// insert the CaretAnnotation after "The Importance" text
tm.FindText(new FindTextParams("wetlands", false, false), (fp_) =>
{
// Add a CaretAnnotation near the found text:
var r = fp_.Bounds[0].ToRect();
var ca = new CaretAnnotation();
ca.Page = page;
ca.Rect = new RectangleF(r.Left - 8, r.Bottom - 16, 16, 16);
});
}
// Done:
doc.Save(stream);
return doc.Pages.Count;
}
}
}