We’re happy to announce the major release of GroupDocs.Viewer for .NET 25.9, available as of September 2025. This major release delivers two new features with public API changes, one enhancement and 4 fixed bug.

New features

  • [New feature] 為每個格式系列引入不同的字型類型 (VIEWERNET-5486)
  • [New feature] 在取得 WordProcessing 系列格式的所有字型時列出替代字型 (VIEWERNET-5484)

Both these features continue to improve the mechanism of extracting and listing used fonts of the loaded document. In short, with VIEWERNET-5484 the GroupDocs.Viewer is now possible to list and return the substitutuion fonts, which are not present in original document, but are used to replace those original fonts, which are missing and thus unavailable on a target machine (where the GroupDocs.Viewer is running). The VIEWERNET-5486 feature improves the public API — instead of a single UsedFontInfo type now there is a IFontInfo interfave and a plenty of its inheritors — one per each formats family. Visit the article “Getting all used fonts in the loaded document ” in public documentation for the further details.

Fixes and enhancements

  • [Enhancement] 在將試算表文件轉換為嵌入式 HTML 時嵌入字型。 (VIEWERNET-5490)
  • [Fix] 基本 PDF 的 PDF 附件在渲染為 HTML 格式時出現問題。 (VIEWERNET-5374)
  • [Fix] 渲染 PDF 為 HTML 時背景漸層不正確。 (VIEWERNET-5345)
  • [Fix] 無法載入特定的 PSD。 (VIEWERNET-3780)
  • [Fix] [UI] Groupdocs Viewer 8.0.7 - 因伺服器延遲返回頁面，最初顯示的頁碼錯誤。 (VIEWERNET-5485)

How to get the update

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