Using OpenXML SDK to replace text on a docx file with a line break (newline)

Question

I am trying to use C# to replace a specific string of text on an entire DOCX file with a line break (newline).

The string of text that I am searching for could be in a paragraph or in a table in the file.

I am currently using the code below to replace text.

using (WordprocessingDocument doc = WordprocessingDocument.Open("yourdoc.docx", true))
{
  var body = doc.MainDocumentPart.Document.Body;
  foreach (var text in body.Descendants<Text>())
  {
    if (text.Text.Contains("##Text1##"))
    {
      text.Text = text.Text.Replace("##Text1##", Environment.NewLine);
    }
  }
}

ISSUE: When I run this code, the output DOCX file has the text replaced with a space (i.e. " ") instead of a line break.

How can I change this code to make this work?

Solution 1

Try with a break. Check the example on this link. You just have to append a Break

Paragraphs, smart tags, hyperlinks are all inside Run. So maybe you could try this approach. To change the text inside a table, you will have to use this approach. Again the text is always inside a Run.

If you are saying that the replace is only replacing for an empty string, i would try this:

using (WordprocessingDocument doc =
                WordprocessingDocument.Open(@"yourpath\testdocument.docx", true))
        {
            var body = doc.MainDocumentPart.Document.Body;
            var paras = body.Elements<Paragraph>();
            foreach (var para in paras)
            {
                foreach (var run in para.Elements<Run>())
                {
                    foreach (var text in run.Elements<Text>())
                    {
                        if (text.Text.Contains("text-to-replace"))
                        {
                            text.Text = text.Text.Replace("text-to-replace", "");
            run.AppendChild(new Break());
                        }
                    }
                }
            }
        }

Solution 2

Instead of adding a line break, try making two paragraphs, one before the "text to be replaced" and one after. Doing that will automatically add a line break between two paragraphs.

Comments

[slayernoah]

Thanks for looking into this. Using run.AppendChild(new Break()); will probably create a new line. But how can I have that put into the document only where it is supposed to replace the text?

[slayernoah]

The Text.Replace() function only accepts two strings I believe

[Erik]

This only replaces single-run text. Text may be split up in multiple runs.

[Tim Malone]

Hi Arun, welcome to SO. Can you please edit this answer to explain why this code fixes the problem, and how it works? Code only answers are discouraged here.