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我试图在.docx文件中创建一个AddAlternativeFormatImportPart,以便通过AltChunk在文档中引用它.问题是下面的代码导致docx文件读取为Word损坏,无法打开.

        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();