OCR To Text File in C#.net

Am not sure if this will help you...
I found this in another web site..Also try the links provided below.


to extract all words from a PDF document for those with adobe acrobat installed like the standarard version 9 ( may work with earlier version but I have not tested against earlier version)

here are a couple of c# member available that will compile provided you have added reference to your project acrobat.dll and added using Acrobat; to your class:

// the following will allow word extraction by pdf file spec
// opening the pdf document is rather crude and need to be more robust
 public static string getTextFromPDF(string filespec)
 {
  Acrobat.AcroAppClass gAppClass = new Acrobat.AcroAppClass();
  Acrobat.AcroAVDoc avDoc = (Acrobat.AcroAVDoc)gAppClass.GetInterface("Acrobat.AcroAVDoc"); //Visible pdf document with a UI Window
  avDoc.Open(System.IO.Path.GetFullPath(filespec), System.IO.Path.GetFileName(filespec));
   
  AcroPDDoc doc = (AcroPDDoc)avDoc.GetPDDoc();
  string txt = PdDocGetText(doc);
  doc.Close();
  avDoc.Close(1);
  gAppClass.Exit();
  return txt;
 }
// slightly modified version of a post in adobe forum by originally by Eldrarak82
 private static string PdDocGetText(AcroPDDoc pdDoc)
 {
  AcroPDPage page;
  int pages = pdDoc.GetNumPages();
  string pageText = "";
  for (int i = 0; i < pages; i++)
  {
   page = (AcroPDPage)pdDoc.AcquirePage(i);
   object jso, jsNumWords, jsWord;
   List<string> words = new List<string>();
   try
   {
    jso = pdDoc.GetJSObject();
    if (jso != null)
    {
     object[] args = new object[] { i };
     jsNumWords = jso.GetType().InvokeMember("getPageNumWords", System.Reflection.BindingFlags.InvokeMethod, null, jso, args, null);
     int numWords = Int32.Parse(jsNumWords.ToString());
     for (int j = 0; j <= numWords; j++)
     {
      object[] argsj = new object[] { i, j, false };
      jsWord = jso.GetType().InvokeMember("getPageNthWord", System.Reflection.BindingFlags.InvokeMethod, null, jso, argsj, null);
      words.Add((string)jsWord);
     }
    }
    foreach (string word in words)
    {
     pageText += word;
    }
   }
   catch
   {
   }
  }
  return pageText;
 }
</string></string>

the above code sample has yet to be fully tested and may need improvement. nonetheless it is a good starting point.

for those interested in tables, rows and columns, look up the doucments by adobe like


http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/a crobat/pdfs/plugin_apps_developer_guide.pdf

around page 130ish to 136

the link

http://wwwimages.adobe.com/www.adobe.com/content/dam/Adobe/en/devnet/acrobat/pdfs/plugin_apps_developer_guide.pdf

may also be helpfull for a lot other tasks.