When saving a file that has HTML content starting with a pre tag using Docx, the first line is duplicated.

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
48/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Quiet
Tech stack
csharp
Domain
backend

Research direction

Start by reproducing the issue through DocX.InsertContent with the HTML snippet, comparing a self-closing br tag with the expanded form. Trace the HTML handling involved and add a regression test showing that content in the initial pre tag is not duplicated; done means both forms produce the expected document.

Written by the indexing model from the issue text.

Description

When saving HTML content to a file using Docx, it duplicates the first line if a break is inserted on the second line. Below is a code snippet example. The content in the pre tag will show in the file twice.

Imports Xceed.Document.NET
Imports Xceed.Words.NET

Dim sbHtmlContent As New StringBuilder

sbHtmlContent.Append("<pre>schema-version = 1.0.0</pre>")

sbHtmlContent.Append("<br/>")

sbHtmlContent.Append("<p>some other content<p/>")

Dim htmlContent = sbHtmlContent.ToString

Dim fullFileName As String = "pathtofile.doc"

Dim doc As Xceed.Words.NET.DocX = Xceed.Words.NET.DocX.Create(fullFileName)

doc.InsertContent(htmlContent, Xceed.Document.NET.ContentType.Html)

doc.Save()

UPDATE: This is happening because of the self closing tag. If I replace this

sbHtmlContent.Append("<br/>")

with this

sbHtmlContent.Append("<br></br>")

It doesn't duplicate the first line.

Dominant language
C#
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