Learn what's new across releases, with details of features, enhancements, and resolved issues.
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Document Solutions for Excel .NET v9.1.4Jul 24, 2026
Fixes
Unexpected custom Formula evaluation in another Cell when retrieving the current Array Formula for a Range.
Incorrect empty value returned for the border color of a Cell without borders.
Unexpected Excel repair warnings and incorrect duotone Image colors when exporting SpreadJS files to XLSX.
Incorrect Conditional Formatting colors in XLSX files exported from SJS sources compared with equivalent SSJSON sources.
Incorrect English weekday names when retrieving Korean-formatted Cell text or exporting a Workbook to PDF.
Unexpectedly slow Worksheet renaming after repeatedly copying Worksheets in a growing Workbook.
Incorrect #REF! results for INDIRECT Formulas that use Japanese localized Table structured-reference specifiers.
Unexpected exceptions when a Workbook contains a question mark in a Table name.
Unexpected null values for empty results in a spilled Formula after opening a Workbook without recalculation.
Incorrect HasArray results for Cells containing regular Formulas or plain text.
Security scanner warnings for known high-severity vulnerabilities in an XML cryptography dependency included with the product.
Missing object details in the exception returned when opening certain Workbooks with conflicting external link data.
Document Solutions for Excel .NET v9.1.3Jul 2, 2026
Fixes
Fixed incorrect handling of Charts inside nested Shape groups when opening a Workbook.
Fixed incorrect Sort results for in-cell Images when sorting a Range that contains Images without alternative text.
Fixed failure to open valid XLSX Workbooks whose theme elements use a default namespace.
Fixed incorrect black Worksheet tab color when clearing the tab color with an empty value.
Fixed incorrect date formatting for non-English Workbook cultures in Cell text and PDF output.
Fixed incorrect Worksheet Formula evaluation when custom names supplied by a Formula resolver return text or numeric values.
Fixed unexpected sharing of Worksheet and Range metadata across Worksheets generated by template processing.
Document Solutions for Excel .NET v9.1.2Jun 25, 2026
Fixes
Fixed failure to open Workbook JSON when a Cell contains array information and a shared Formula reference.
Fixed incorrect AVERAGEIF calculation results when the criteria range contains both numeric values and blank Cells and the sum range is omitted.
Fixed incorrect Formula results when a Named Range LAMBDA returns a Range through an IFS expression for use in COUNTIFS or MAXIFS.
Fixed unexpected unsigned satellite resource assembly included in the NuGet package.
Document Solutions for Excel .NET v9.1.1Jun 11, 2026
Fixes
Fixed issue where unable to open Workbooks containing defined name formulas that use dynamic array functions and optional LAMBDA parameters.
Fixed unexpected recalculation of some external-link formulas when opening a Workbook, causing cached values to be replaced with #NAME? or recalculated results.
Fixed issue where unable to parse CJK date formats in template language filter DATETIME expressions.
Document Solutions for Excel .NET v9.1.0Major versionMay 5, 2026
Features
Added the IPivotTable.DisplayFieldCaptions property to allow showing or hiding field headers in pivot tables.
Added support for exporting shape text with bullets to PDF, Image and HTML.
Added support for exporting waterfall charts to PDF, Image and HTML.
Added the ICellControl.SetCheckbox method to support Microsoft Excel cell checkboxes.
Added support for NULL and empty values in template filters.
Added support for the REGEX keyword in template filters.
Added support for date and time values in template filters.
Added the IRange.CellPicture property to allow inserting pictures in cells.
Added support for expandable cell types and drop-down fields in template cells.
Added support for pivot table styles.
Added support for lossless import and export of the SJS and SSJSON file formats in SpreadJS v19.1.
Added the PrintOutOptions.PaperSourceName property to support printer tray and paper source selection in PrintOut.
Fixes
Fixed the issue of images from template data sources appearing in the wrong order.
Fixed the issue of pivot table styles being lost after refresh.
Fixed the issue of pivot table cell alignment being lost after sorting.
Fixed the issue of recalculating a workbook after input updates producing inconsistent results.
Fixed the issue where certain SJS files failed to open due to a FormatException triggered by NaN values.
Fixed the issue where the implicit intersection operator (@) was unexpectedly inserted into FORECAST.LINEAR formulas after opening and saving a workbook.
Document Solutions for Excel, .NET Edition v9.0.0Major versionJan 6, 2026
Features
Support Lossless of Query Table.
Added support for new Excel functions VALUETOTEXT and ARRAYTOTEXT.
Support controlling SharedFormula export in XLSX export.
Support AI functions.
Support SJS/SSJSON IO of Threaded comments.
Performance optimization.
Fixes
Copying a Worksheet with many formulas is very slow.
Opening and profiling a Workbook is noticeably slower.
Saving a Workbook to PDF can trigger a console error.
Formatting and AutoFit on very large reports causes severe slowdowns and high memory use.
Copying formulas across Worksheets is significantly slower in newer versions.
Range.Copy on very large ranges can be extremely slow.
Enabling the calculation engine after sheet and named-range changes can throw a NullReferenceException.
XLOOKUP can return incorrect numeric results compared to Excel.
Accessing Range.Text may throw an exception.
LET formulas adding a scalar to very large arrays return values only in the first row and zeros elsewhere.