Re: Search and replace in a presentation

I am using the following snippet--borrowed from this site, in fact--to traverse a presentation and fill in a template.  I am doing something wrong, however, as the saved file does not reflect the changes made.  Any ideas?

It is as tho the StreamWriter does not actually write anything.

Slide theSlide = slidePart.Slide;
if (theSlide != null)
{

  bool isFound = false;
  using (StreamReader sr = new StreamReader(slidePart.GetStream()))
  {
    docText = sr.ReadToEnd();
    if (docText.IndexOf(templateID) >= 0)
    {
      MessageBox.Show("Found "+templateID);
      isFound = true;
    }
  }

  Regex regexText = new Regex(templateID);
  docText = regexText.Replace(docText, templateValue);

  using (StreamWriter sw = new StreamWriter(slidePart.GetStream(FileMode.Create)))
  {
    if (docText.IndexOf(templateID) >= 0)
    {
      if (isFound)
        MessageBox.Show("Problem: still found " + templateID);
    }
    sw.Write(docText);
    isChanged = true;
  }
 
}

Hi lwdallas

The code you are using works for me

However, it's not clever enough for text that may have become split.. Did the message box pop up with having "Found" occur? If it didn't it may be the case that your text has been separated in the Open XML of the presentation. If so, you may want to use a text value that you know is unique but doesn't contain grammer.

You can test the code in debug, but if it's successfully running the regex change but doesn't persist the update to the file you should check you're doing the following.
1) When you open the Presentation Document you need to set it as editable, like this:
PresentationDocument.Open(docName, true)
2) After your above code, you need to call the Save() method on the Presentation, like this:
presentationDocument.PresentationPart.Presentation.Save();

Hope this helps