Extract texts from xps document to textbox

Question

I keep running in to this code when researching, however copying this to my form gives me an error in the documentViewerElement part saying The name 'documentViewerElement' does not exist in the current context

XpsDocument _xpsDocument=new XpsDocument("/path",System.IO.FileAccess.Read);
IXpsFixedDocumentSequenceReader fixedDocSeqReader 
    =_xpsDocument.FixedDocumentSequenceReader;
IXpsFixedDocumentReader _document = fixedDocSeqReader.FixedDocuments[0];
IXpsFixedPageReader _page 
    = _document.FixedPages[documentViewerElement.MasterPageNumber];
StringBuilder _currentText = new StringBuilder();
System.Xml.XmlReader _pageContentReader = _page.XmlReader;
if (_pageContentReader != null)
{
  while (_pageContentReader.Read())
  {
    if (_pageContentReader.Name == "Glyphs")
    {
      if (_pageContentReader.HasAttributes)
      {
        if (_pageContentReader.GetAttribute("UnicodeString") != null )
        {                                   
          _currentText.
            Append(_pageContentReader.
            GetAttribute("UnicodeString"));                              
        }
      }
    }
  }
}
string _fullPageText = _currentText.ToString();

I'm hoping to get all the texts from an xps document and put it on a rich text box.

Without stating the obvious... You have not assigned the variable documentViewerElement — TheEdge, Aug 12 '15 at 10:22

score 2 · Accepted Answer · answered Aug 12 '15 at 10:28

documentViewerElement is not defined hence your error.

In the following line:

IXpsFixedPageReader _page 
= _document.FixedPages[documentViewerElement.MasterPageNumber];

documentViewerElement.MasterPageNumber is just the page number, so change it to the xps page you want to read, e.g.

IXpsFixedPageReader _page 
= _document.FixedPages[0];

To read the text from the entire xps file you could try the following (it's pretty much the same as your code it's just looping (Taken from here).

private string ReadXpsFile(string fileName)
{
    XpsDocument _xpsDocument = new XpsDocument(fileName, System.IO.FileAccess.Read);
    IXpsFixedDocumentSequenceReader fixedDocSeqReader = _xpsDocument.FixedDocumentSequenceReader;
    IXpsFixedDocumentReader _document = fixedDocSeqReader.FixedDocuments[0];
    FixedDocumentSequence sequence = _xpsDocument.GetFixedDocumentSequence();
    string _fullPageText="";

    for (int pageCount = 0; pageCount < sequence.DocumentPaginator.PageCount; ++pageCount)
    {
        IXpsFixedPageReader _page = _document.FixedPages[pageCount];
        StringBuilder _currentText = new StringBuilder();
        System.Xml.XmlReader _pageContentReader = _page.XmlReader;

        if (_pageContentReader != null)
        {
            while (_pageContentReader.Read())
            {
                if (_pageContentReader.Name == "Glyphs")
                {
                    if (_pageContentReader.HasAttributes)
                    {
                        if (_pageContentReader.GetAttribute("UnicodeString") != null)
                        {
                            _currentText.
                              Append(_pageContentReader.
                              GetAttribute("UnicodeString"));
                        }
                    }
                }
            }
        }

        _fullPageText += _currentText.ToString();
    }

    return _fullPageText;
}

I am getting an error `FixedDocumentSequence sequence` saying the namespace could not be found. I added the references to `PresentationCore` and `PresentationFramework` but still can't figure out what I need to do to fix it. Could you help? — Mercifies, Jan 29 '17 at 18:40
The class FixedDocumentSequence is within the namespace System.Windows.Documents .. add a reference to that. — Paul Zahra, Jan 30 '17 at 09:21

Extract texts from xps document to textbox

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