in use aspose version: 14.2
test code:
string htmlFile = fileName.Substring(0, fileName.Length - fi.Extension.Length) + ".html";
docx.Save(htmlFile, GetHtmlSaveOption());
private ADoc.Saving.HtmlSaveOptions GetHtmlSaveOption() {
ADoc.Saving.HtmlSaveOptions options = new ADoc.Saving.HtmlSaveOptions(ADoc.SaveFormat.Html);
options.ExportHeadersFootersMode = Aspose.Words.Saving.ExportHeadersFootersMode.None;
options.ExportFontResources = false;
options.ExportPageSetup = true;
options.ExportDocumentProperties = false;
options.ExportTocPageNumbers = false;
options.ScaleImageToShapeSize = false;
// added : 2014/03/19
options.CssStyleSheetType = ADoc.Saving.CssStyleSheetType.Embedded;
options.ExportListLabels = ADoc.Saving.ExportListLabels.ByHtmlTags;
options.DocumentSplitCriteria = Aspose.Words.Saving.DocumentSplitCriteria.None;
return options;
}