We are pleased to announce the release of version 2.6.1. Featured are a handful of new areas of functionality and numerous bug fixes.

A summary of changes is available in the Release Notes. A full list of changes is available in the changelog.

Release Notes

The most notable changes in this release are:

Breaking Change

• Rename exported type TabColor to TabColorRGB
• Rename exported constant TotalColumns to MaxColumns
• Rename exported variable ErrMaxFileNameLength to ErrMaxFilePathLength
• Rename exported variable ErrWorkbookExt to ErrWorkbookFileFormat
• Remove exported variable ErrEncrypt
• Change worksheet name case-insensitive

Notable Features

• New support 34 formula functions: CONVERT, COVARIANCE.S, DAVERAGE, DAYS360, DCOUNT, DCOUNTA, DGET, DMAX, DMIN, DPRODUCT, DSTDEV, DSTDEVP, DSUM, DVAR, DVARP, EDATE, EOMONTH, EUROCONVERT, GROWTH, HYPERLINK, MINVERSE, MMULT, NETWORKDAYS, NETWORKDAYS.INTL, PEARSON, RSQ, SKEW.P, SLOPE, STDEVPA, STEYX, TREND, WEEKNUM, WORKDAY, WORKDAY.INTL
• New function DeleteComment support to delete comment, related issue #849
• The AddShape function now support assigning a macro to the shape
• Add support for the 1900 and 1904 date system, related issue #1212
• Add support update cell hyperlink, related issue #1217
• The AddPicture function now allowing insert EMF, WMF, EMZ and WMZ format images, related issue #1225
• Make workbook open failed exception message clear, new exported variable ErrWorkbookPassword for the error message on receiving the incorrect workbook password
• New exported constants MinFontSize, MinColumns and MaxCellStyles
• Add array formula support for the formula calculation engine
• Support for workbook encryption by password, related issue #199
• RichTextRun support set superscript and subscript by vertAlign attribute
• The DeleteDataValidation function support deleting all data validations in the worksheet, related issue #1254
• Formula calculation engine support percentile symbol in condition criteria expression
• Formula calculation engine support dependence formulas calculation, related issue #1262
• Add export option MaxCalcIterations for specifies the maximum iterations for iterative calculation
• Add export type ColorMappingType for color transformation types enumeration
• Support adjust table range when removing and inserting column/row
• Support set and get color index, theme and tint for sheet tab, related issue #1283
• Add new export function GetRowOpts for rows iterator, to support get rows properties, related issue #1296

Improve the Compatibility

• Improve the compatibility with invalid internal styles count, resolve issue #1211
• Improve the compatibility with Google Sheet, resolve issue #1244 and #1314
• Stream writer now skips writing nil values when set cells value for the row, related issue #1299

Bug Fixes

• Fix generated file corrupted when the same field is used for pivot table data and rows/columns, resolve issue #1203
• Fix get incorrect rich text value caused by missing cell type checking, resolve issue #1213
• Fix incorrect cell data types casting results when number formatting, resolve issue #1219
• Fix the read cell is empty when the cell is in 0 placeholder number format style, resolve issue #1312 and #1313
• Fix set cell value with column and row style inherit issue, resolve issue #1163
• Fix panic when adding pane on empty sheet views worksheet
• Fix the problem of multi arguments formula calculation in some case
• Fix generated file corrupted caused by incorrect worksheet header footer fields order, resolve issue #1257
• Fix set cell value failed in some case, resolve issue #1264
• Fix the panic when set or get sheet view options on the sheet without views options
• Fix generated workbook corruption caused by empty created or modified dcterms in the document core properties
• Fix doc properties missing after creating new worksheet, resolve issue #1298

Performance

• Improve performance for set sheet row and the merging cells, fix performance impact when resolving issue #1129
• Optimization formula calculation performance
• Reduces memory usage and speedup the AddComment function, resolve issue #1310

Miscellaneous

• The dependencies module has been updated
• Unit tests and godoc updated, made the test case compatible with go1.19
• Documentation website with multilingual: Arabic, German, Spanish, English, French, Russian, Chinese, Japanese, and Korean, which has been updated

Thank you

Thanks for all the contributors to Excelize. Below is a list of contributors that have code contributions in this version:

• @JDavidVR (David)
• @sceneq
• @Juneezee (Eng Zer Jun)
• @MichealJl (jialei)
• @ww1516123
• @z-hua (z.hua)
• @xdlrt (yeshu)
• @eaglexiang (Eagle Xiang)
• @MJacred
• @ReganYue (Regan Yue)
• @thomascharbonnel (Thomas Charbonnel)
• @ee0703 (EE)
• @NaturalGao (NaturalGao)
• @Sangua633