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I am trying to create an AddAlternativeFormatImportPart in a .docx file in order to reference it in the document via an AltChunk. the problem is that the code below causes the docx file to read as corrupted by Word and cannot be opened.
string html = "some html code."
string altChunkId = "html234";
var document = WordprocessingDocument.Open(inMemoryPackage, true);
var mainPart = document.MainDocumentPart.Document;
var mainDocumentPart = document.MainDocumentPart;
AlternativeFormatImportPart chunk = mainDocumentPart.AddAlternativeFormatImportPart
(AlternativeFormatImportPartType.Xhtml, altChunkId);
Stream contentStream = chunk.GetStream(FileMode.Open,FileAccess.ReadWrite);
StreamWriter contentWriter = new StreamWriter(contentStream);
contentWriter.Write(html);
contentWriter.Flush();
{
...
}
mainPart.Save();
943
asked Dec 23 '11 14:12
I think it might be how you are handeling the stream from the AlternativeFormatImportPart. Try using FeedData instead, like in my example below.
StringBuilder xhtmlBuilder = new StringBuilder();
xhtmlBuilder.Append("<html>");
xhtmlBuilder.Append("<body>");
xhtmlBuilder.Append("<b>Hello world!</b>");
xhtmlBuilder.Append("</body>");
xhtmlBuilder.Append("</html>");
using (WordprocessingDocument doc = WordprocessingDocument.Open(inputFilePath, true))
{
string altChunkId = "chunk1";
AlternativeFormatImportPart chunk = doc.MainDocumentPart.AddAlternativeFormatImportPart
(AlternativeFormatImportPartType.Xhtml, altChunkId);
using (MemoryStream xhtmlStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(xhtmlBuilder.ToString())))
{
chunk.FeedData(xhtmlStream);
AltChunk altChunk = new AltChunk();
altChunk.Id = altChunkId;
doc.MainDocumentPart.Document.Body.Append(altChunk);
}
doc.MainDocumentPart.Document.Save();
}
I think it is because you cannot import an AltChunk into a document that is opened from a memory stream. I had the same issue. I was opening the template from a memory stream like so:
Private Sub UpdateDoc(templatePath As String)
Using fs As FileStream = File.OpenRead(templatePath)
Using ms As New MemoryStream
CopyStream(fs, ms)
Using doc As WordprocessingDocument = WordprocessingDocument.Open(ms, True)
'update the document
doc.MainDocumentPart.Document.Save()
End Using
End Using
End Using
End Sub
Private Sub CopyStream(source As Stream, target As Stream)
Dim buffer() As Byte
Dim bytesRead As Integer = 1
ReDim buffer(32768)
While bytesRead > 0
bytesRead = 0
bytesRead = source.Read(buffer, 0, buffer.Length)
target.Write(buffer, 0, bytesRead)
End While
End Sub
This works for normal updates of content controls etc. and document is fine when streamed back to client or saved as docx. But it corrupts doc when inserting an AltChunk.
Opening a doc from a physical file path works when inserting AltChunk like so:
Using doc As WordprocessingDocument = WordprocessingDocument.Open(strTempFile, True)
Dim altChunkId As String = "AltChunkId1"
Dim mainDocPart As MainDocumentPart = doc.MainDocumentPart
Dim chunk As AlternativeFormatImportPart = mainDocPart.AddAlternativeFormatImportPart(AlternativeFormatImportPartType.Xhtml,
altChunkId)
Dim strHTML As String = "<html><head/><body><h1>Html Heading</h1><p>This is an html document in a string literal.</p></body></html>"
Using chunkStream As Stream = chunk.GetStream(FileMode.Create, FileAccess.Write)
Using sr As StreamWriter = New StreamWriter(chunkStream)
sr.Write(strHTML)
End Using
End Using
Dim altChunk As New AltChunk
altChunk.Id = altChunkId
mainDocPart.Document.Body.InsertAfter(altChunk, mainDocPart.Document.Body.Elements(Of Paragraph)().Last())
mainDocPart.Document.Save()
End Using
It seems you cannot import an AltChunk into a memory stream, you can only do it when you open the physical file for writing. Can anyone shed some light on this matter?
32
answered Nov 07 '22 22:11
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