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What's Changed
- Fix file error while modify existing word document by @tonyqus in #1791
- Pin zip entry timestamps to 1980-01-01 to match Excel by @ken-swyfft in #1755
- Extra XDDF Charts Implementation by @opencode-agent[bot] in #1792
- Eliminate redundant CT_Sst.si parallel list in SharedStringsTable write path by @tonyqus with @Copilot in #1793
- Fix TEXT() formula function: resolve RefEval before StringEval check to prevent ErrorCode 15 by @tonyqus with @Copilot in #1794
- Perf: O(1) style lookup in CellUtil via StyleKey/StyleCache, replacing O(n²) scan by @tonyqus in #1795
- Fix: remove UTF-8 BOM from SheetDataWriter output by @WittgensteinHe in #1798
- Optimize AutoSizeColumn: spatial index, font caching, maxRows overload by @ken-swyfft in #1758
- Fix System.Security.Cryptography.Xml vulnerability (CVE-2026-26171, CVE-2026-33116) by @tonyqus with @Copilot in #1802
- Sync XDDF from POI Bug 59623 (Angles/Width/Angle/Rotation) by @opencode-agent[bot] in #1796
- Upgrade cryptography packages to 10.0.6 by @opencode-agent[bot] in #1803
- Fix System.Memory FileLoadException on net472 test runs by @tonyqus with @Copilot in #1806
- Fix NU1901 vulnerability warnings in build project by @tonyqus with @Copilot in #1807
- Fix LazyStyles_UntouchedStylesPreservedOnSave test failure by @Yvees in #1804
- Fix System.IO.FileLoadException for System.Memory on net472 by @tonyqus with @Copilot in #1809
- Integrate ExcelFinancialFunctions as backing engine for NPOI financial formula evaluation by @tonyqus with @Copilot in #1808
- Add locale-aware NumberToTextConverter.ToText overload; fix DataFormatter culture-sensitive parse failure by @tonyqus with @Copilot in #1783
- Fix culture-sensitive numeric conversion in XDDF Chart data by @lievendf in #1812
- Optimize PngUtils.MatchesPngHeader() by @stevenaw in #1815
- Bump System.Security.Cryptography.Xml and System.Formats.Asn1 to 10.0.10 (fixes CI) by @ken-swyfft in #1826
- Optimize Number.BitCount() on newer runtimes by @stevenaw in #1814
- Implement Fluent API- IWorkbook.ForceFormulaRecalculation by @tonyqus in #1827
- Implement POI Bug Github-803 - Sheet function by @tonyqus in #1828
- Lazy tracker: no font access on row flush by @opencode-agent[bot] in #1829
- Avoid empty custDash node in theme.xml by @tonyqus in #1831
- Fixed RGBWithTint to clone StoredRGB before applying tint. by @opencode-agent[bot] in #1832
- Implemented multi-range cells in NCellRange by @opencode-agent[bot] in #1838
- a:txBody should be written as xdr:txBody. by @opencode-agent[bot] in #1840
- Fixed CT_Double to serialize zero val attributes. by @opencode-agent[bot] in #1843
- Revert "Integrate ExcelFinancialFunctions as backing engine for NPOI financial formula evaluation" by @tonyqus in #1850
- Whole-column lookup references (A:A) cause O(sheet size) scans instead of O(used range) by @EmilienDup in #1846
- POI Bug Github-1172: Add XWPFRun.IsRtl property by @tonyqus with @Copilot in #1851
- POI Bug 68183: SXSSFWorkbook: dispose temp files automatically on Close() by @tonyqus with @Copilot in #1852
- POI Bug Github-733: MIRR - align rate argument order with Excel and correct PV/FV discounting math by @tonyqus with @Copilot in #1853
- SkiaSharp reference update by @tonyqus in #1856
- SST streaming parser should not drop self-closing node by @tonyqus in #1863
- Add XWPFTable.WidthType property by @tonyqus in #1861
- Theme now saved when copied between workbooks. by @opencode-agent[bot] in #1837
- Fixed #863: round seconds when no fractional seconds in format. by @opencode-agent[bot] in #1833
- Update Microsoft.SourceLink.GitHub package version to fix security issue by @Nathanael-Mtd in #1866
- Fix two windows-latest test flakes: TestNPOI1469 rounding and POIDataSamples.GetFile sharing mode by @ken-swyfft in #1867
- Mark Microsoft.SourceLink.GitHub PrivateAssets=all so it is not a consumer dependency in the nuspec by @ken-swyfft in #1868
- Bump System.Security.Cryptography.Xml from 10.0.6 to 10.0.10 by @dependabot[bot] in #1869
- Use
RandomNumberGeneratorfor encryptorConfirmPassword(string)material generation by @tonyqus with @Copilot in #1872 - Add AreaReference support for structured table references by @ken-swyfft in #1750
New Contributors
- @WittgensteinHe made their first contribution in #1798
- @lievendf made their first contribution in #1812
- @stevenaw made their first contribution in #1815
- @Nathanael-Mtd made their first contribution in #1866
- @dependabot[bot] made their first contribution in #1869
Full Changelog: 2.8.0-rc3...2.8.1-rc1