Sebastian

Use SharpZipLib Version 1.0.0 for NPOI (Version 2.4.1). The SharpZipLib Version 1.1.0 and 1.2.0 don't work for me. Best regards

Hi, try the following: Download the not minimized version. Change the following line: _mobile = /ip(hone|od|ad)|android|blackberry|windows phone|opera mini|silk/i.test(navigator.userAgent) || (navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1); to _mobile = /ip(hone|od|ad)|android|blackberry|windows...

Hi, okay, I just missed the feature. No hurry. Can you tell me on which docs (from Microsoft?) you create the implementation of features? Thanks

Hi, no hurry. Perhaps this helps to find a solution: **NPOI (Apache-2.0 license)** https://github.com/nissl-lab/npoi/blob/37a8435dc4d613d9cf6145d044e4bf28bdfc3e4e/OpenXmlFormats/Spreadsheet/Styles/CT_NumFmt.cs **EPPlus 4.5 (LGPL)** https://github.com/JanKallman/EPPlus/blob/55c5ba6169eaa6ae7867fefb36a84cc0b28be85a/EPPlus/Style/XmlAccess/ExcelNumberFormatXml.cs **ExcelNumberFormat (MIT)** https://github.com/andersnm/ExcelNumberFormat **exceljs (MIT)** https://github.com/exceljs/exceljs/blob/2ab468b8bae2c8d5844f922d61ac7d960fee26be/lib/xlsx/xform/style/numfmt-xform.js Writing the format only with XML...

Hi, I have the same problem, did you find a solution or workaround for this problem? Thank you