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AltChunk containing docx file corrupts document

docx

enhancement

Status: Open.

#1670 In nissl-lab/npoi;

· kemsky opened on Jan 16, 2026

Paragraph.ReplaceText cannot replace as expected

need-investigation

Status: Open.

#1669 In nissl-lab/npoi;

· ModelPredictControl opened on Jan 3, 2026

Bug: NPOI does not format simple phone number format correctly

need-investigation

xls

xlsx

Status: Open.

#1668 In nissl-lab/npoi;

· ConnorGlacken opened on Dec 18, 2025

AutoSizeColumn only resizes the second column

bug

Status: Open.

#1663 In nissl-lab/npoi;

· SDNA-ALP opened on Nov 27, 2025

WorkbookFactory.Create(Stream inputStream, string password) returns InvalidFormatException

need-investigation

xlsx

Status: Open.

#1662 In nissl-lab/npoi;

· plpolak opened on Nov 25, 2025

Slow Image Insertion Performance in NPOI When Adding Original Images to XLSX

drawing

need-investigation

performance

Status: Open.

#1657 In nissl-lab/npoi;

· weiai123312 opened on Oct 31, 2025

NSax dependency introduction, brings LGPL-3.0 licence, from 2.7.4 -> 2.7.5

community

need-investigation

Status: Open.

#1652 In nissl-lab/npoi;

· nicolashemery opened on Oct 22, 2025

Detecting password protected files

encryption

enhancement

Status: Open.

#1650 In nissl-lab/npoi;

· kemsky opened on Oct 16, 2025

Stacked Column Chart not currently supported?

Status: Open.

#1648 In nissl-lab/npoi;

· muguemjee opened on Oct 15, 2025

sheet.ShiftRows throws System.InvalidOperationException:“Cannot add merged region B3:C3 to sheet because it overlaps with an existing merged region (B3:C3).”

bug

xlsx

Status: Open.

#1646 In nissl-lab/npoi;

· TimLee88 opened on Oct 11, 2025

Problem with font "BNazanin.ttf", System.NullReferenceException

bug

drawing

sxssf

Status: Open.

#1630 In nissl-lab/npoi;

· mohammadKhalafi opened on Sep 2, 2025

Add support for threaded comments

enhancement

xlsx

Status: Open.

#1627 In nissl-lab/npoi;

· deanm0000 opened on Aug 21, 2025

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NPOI 2.9.0