private static void HighlightSearchResults(PdfPage page, PdfTextSearchResultCollection searchResults, PdfColor color)
{
PdfPen pen = new PdfPen(color, 0.5);
for (int i = 0; i < searchResults.Count; i++)
{
PdfTextFragmentCollection tfc = searchResults[i].TextFragments;
for (int j = 0; j < tfc.Count; j++)
{
PdfPath path = new PdfPath();
path.StartSubpath(tfc[j].FragmentCorners[0].X, tfc[j].FragmentCorners[0].Y);
path.AddPolygon(tfc[j].FragmentCorners);
page.Graphics.DrawPath(pen, path);
}
}
}
private static void HighlightSearchResults(PdfPage page, PdfTextSearchResultCollection searchResults, PdfColor color)
{
PdfPen pen = new PdfPen(color, 0.5);
for (int i = 0; i < searchResults.Count; i++)
{
PdfTextFragmentCollection tfc = searchResults[i].TextFragments;
for (int j = 0; j < tfc.Count; j++)
{
PdfPath path = new PdfPath();
path.StartSubpath(tfc[j].FragmentCorners[0].X, tfc[j].FragmentCorners[0].Y);
path.AddPolygon(tfc[j].FragmentCorners);
page.Graphics.DrawPath(pen, path);
}
}
}
/// <summary>
/// Main method for running the sample.
/// </summary>
public static SampleOutputInfo[] Run(Stream input)
{
PdfFixedDocument document = new PdfFixedDocument(input);
PdfContentExtractor ce = new PdfContentExtractor(document.Pages[0]);
// Simple search.
PdfTextSearchResultCollection searchResults = ce.SearchText("at");
HighlightSearchResults(document.Pages[0], searchResults, PdfRgbColor.Red);
// Whole words search.
searchResults = ce.SearchText("at", PdfTextSearchOptions.WholeWordSearch);
HighlightSearchResults(document.Pages[0], searchResults, PdfRgbColor.Green);
// Regular expression search, find all words that start with uppercase.
searchResults = ce.SearchText("[A-Z][a-z]*", PdfTextSearchOptions.RegExSearch);
HighlightSearchResults(document.Pages[0], searchResults, PdfRgbColor.Blue);
SampleOutputInfo[] output = new SampleOutputInfo[] { new SampleOutputInfo(document, "xfinium.pdf.sample.searchtext.pdf") };
return(output);
}
