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    <p>Let me try pointing you in a different direction. iTextSharp has a really beautiful and simple text extraction system that handle some of the basic tokens. Unfortunately it doesn't handle color information but <a href="https://stackoverflow.com/questions/5872051/how-to-get-text-with-a-certain-color-from-a-pdf-c/5873831#5873831">according to @Mark Storer it might not be too hard to implement yourself</a>.</p> <p><strong>BEGIN EDIT</strong></p> <p>I started work on implementing color information. See <a href="http://chrishaas.wordpress.com/2011/07/31/getting-color-information-from-itextsharps-textrenderinfo-and-itextextractionstrategy/" rel="noreferrer">my blog post here</a> for more details. (Sorry for the bad formatting, heading off to dinner now.)</p> <p><strong>END EDIT</strong></p> <p>The code below combines several questions and answers here including <a href="https://stackoverflow.com/questions/2375674/itextsharp-how-to-get-the-position-of-word-on-a-page/4866110#4866110">this one to get the font height</a> (although its not exact) as well as another one (that for the life of me I can't seem to find anymore) that shows how to detect for faux bold.</p> <p>The <code>PostscriptFontName</code> returns some additional characters in front of the font name, I think it has to do with when you embed font subsets.</p> <p>Below is a complete WinForms application that targets iTextSharp 5.1.1.0 and extracts text as HTML.</p> <p><strong>Screenshot of sample PDF</strong></p> <p><strong><img src="https://i.stack.imgur.com/zNNk7.png" alt="Screenshot of sample PDF"></strong></p> <p><strong>Sample text extracted as HTML</strong></p> <pre><code>&lt;span style="font-family:NJNSWD+Papyrus-Regular;font-size:11.61407"&gt;Hello &lt;/span&gt; &lt;span style="font-family:NJNSWD+Papyrus-Regular-Bold;font-size:11.61407"&gt;w&lt;/span&gt; &lt;span style="font-family:NJNSWD+Papyrus-Regular-Bold;font-size:37.87201"&gt;o&lt;/span&gt; &lt;span style="font-family:NJNSWD+Papyrus-Regular-Bold;font-size:11.61407"&gt;rl&lt;/span&gt; &lt;span style="font-family:NJNSWD+Papyrus-Regular;font-size:11.61407"&gt;d &lt;/span&gt; &lt;br /&gt; &lt;span style="font-family:NJNSWD+Papyrus-Regular;font-size:11.61407"&gt;Test &lt;/span&gt; </code></pre> <p><strong>Code</strong></p> <pre><code>using System; using System.Collections.Generic; using System.Text; using System.Windows.Forms; using iTextSharp.text.pdf.parser; using iTextSharp.text.pdf; namespace WindowsFormsApplication2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { PdfReader reader = new PdfReader(System.IO.Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.Desktop), "Document.pdf")); TextWithFontExtractionStategy S = new TextWithFontExtractionStategy(); string F = iTextSharp.text.pdf.parser.PdfTextExtractor.GetTextFromPage(reader, 1, S); Console.WriteLine(F); this.Close(); } public class TextWithFontExtractionStategy : iTextSharp.text.pdf.parser.ITextExtractionStrategy { //HTML buffer private StringBuilder result = new StringBuilder(); //Store last used properties private Vector lastBaseLine; private string lastFont; private float lastFontSize; //http://api.itextpdf.com/itext/com/itextpdf/text/pdf/parser/TextRenderInfo.html private enum TextRenderMode { FillText = 0, StrokeText = 1, FillThenStrokeText = 2, Invisible = 3, FillTextAndAddToPathForClipping = 4, StrokeTextAndAddToPathForClipping = 5, FillThenStrokeTextAndAddToPathForClipping = 6, AddTextToPaddForClipping = 7 } public void RenderText(iTextSharp.text.pdf.parser.TextRenderInfo renderInfo) { string curFont = renderInfo.GetFont().PostscriptFontName; //Check if faux bold is used if ((renderInfo.GetTextRenderMode() == (int)TextRenderMode.FillThenStrokeText)) { curFont += "-Bold"; } //This code assumes that if the baseline changes then we're on a newline Vector curBaseline = renderInfo.GetBaseline().GetStartPoint(); Vector topRight = renderInfo.GetAscentLine().GetEndPoint(); iTextSharp.text.Rectangle rect = new iTextSharp.text.Rectangle(curBaseline[Vector.I1], curBaseline[Vector.I2], topRight[Vector.I1], topRight[Vector.I2]); Single curFontSize = rect.Height; //See if something has changed, either the baseline, the font or the font size if ((this.lastBaseLine == null) || (curBaseline[Vector.I2] != lastBaseLine[Vector.I2]) || (curFontSize != lastFontSize) || (curFont != lastFont)) { //if we've put down at least one span tag close it if ((this.lastBaseLine != null)) { this.result.AppendLine("&lt;/span&gt;"); } //If the baseline has changed then insert a line break if ((this.lastBaseLine != null) &amp;&amp; curBaseline[Vector.I2] != lastBaseLine[Vector.I2]) { this.result.AppendLine("&lt;br /&gt;"); } //Create an HTML tag with appropriate styles this.result.AppendFormat("&lt;span style=\"font-family:{0};font-size:{1}\"&gt;", curFont, curFontSize); } //Append the current text this.result.Append(renderInfo.GetText()); //Set currently used properties this.lastBaseLine = curBaseline; this.lastFontSize = curFontSize; this.lastFont = curFont; } public string GetResultantText() { //If we wrote anything then we'll always have a missing closing tag so close it here if (result.Length &gt; 0) { result.Append("&lt;/span&gt;"); } return result.ToString(); } //Not needed public void BeginTextBlock() { } public void EndTextBlock() { } public void RenderImage(ImageRenderInfo renderInfo) { } } } } </code></pre>
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    1. USChris Haas
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    1. COThanks Chris for your valuable solution and useful links. I will try to implement this.
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    2. COThanks a lot Chris your solution has helped us a lot, but we are struck at one place, how can we find if text is underline or not?
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      1. USDeepesh
    3. COHi @Deepesh, unfortunately the PDF spec doesn't support underlining at the raw text level. Instead it is done in one of two ways, either through annotations (rare) or by just drawing a very thin rectangle under some text (most common). In both cases you would have to calculate the position of the text relative to the rectangle. While technically possible, I think it would be a giant headache. If your documents are uniform, however, you might be able to write some arbitrary rules.
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