Rectangle Text Extract from Pdf using Asp.net

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C#

ASP.NET

PDF

Hi,
I am using Pdf reader and Extractor in My Coding.My problem is Below code is Extract one page Text, but i need rectangle or highlighted text only.

  PdfReader reader = new PdfReader(Server.MapPath(path));
//Document document = new Document();
StringBuilder text = new StringBuilder();
iTextSharp.text.Rectangle size = reader.GetPageSizeWithRotation(1);
       
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
        
iTextSharp.text.Rectangle rect = new iTextSharp.text.Rectangle(10, 30, 50, 70);
RenderFilter[] renderFilter = new RenderFilter[1];
renderFilter[0] = new RegionTextRenderFilter(rect);
ITextExtractionStrategy textExtractionStrategy = newFilteredTextRenderListener(new LocationTextExtractionStrategy(), renderFilter);
  // string text = PdfTextExtractor.GetTextFromPage(reader, 1, textExtractionStrategy);
TextBox1.Text = PdfTextExtractor.GetTextFromPage(reader,reader.NumberOfPages,strategy).ToString();