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

enhancement

Status: Open.

#1657 In nissl-lab/npoi;

· weiai123312 opened on Oct 31, 2025

Bug: REPLACE function fails with empty StringBuilder in Replace.cs

bug

Status: Open.

#1655 In nissl-lab/npoi;

· ZagidullinRuslanG opened on Oct 30, 2025

File header and FileMagicContainer are causing a regression bug from 2.7.4 to 2.7.5

bug

Status: Open.

#1654 In nissl-lab/npoi;

· mbedded opened on Oct 29, 2025

ST_jc enum missing values

bug

Status: Open.

#1653 In nissl-lab/npoi;

· kemsky opened on Oct 27, 2025

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

bug

Status: Open.

#1652 In nissl-lab/npoi;

· nicolashemery opened on Oct 22, 2025

Detecting password protected files

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

Status: Open.

#1646 In nissl-lab/npoi;

· TimLee88 opened on Oct 11, 2025

[Proposal] Support for password-protected Office file encryption (Agile) – Reference Implementation

enhancement

security

Status: Open.

#1641 In nissl-lab/npoi;

· modeverv opened on Oct 3, 2025

· 

NPOI 2.8.0

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

· 

NPOI 2.9.0

NumberToTextConverter ignores locale

bug

xls

xlsx

Status: Open.

#1626 In nissl-lab/npoi;

· Bykiev opened on Aug 20, 2025

· 

NPOI 2.9.0