Fix: Honor CompareOptions and Culture in RangeSortOptions#2345
Merged
swmal merged 1 commit intoEPPlusSoftware:develop8from May 7, 2026
Merged
Fix: Honor CompareOptions and Culture in RangeSortOptions#2345swmal merged 1 commit intoEPPlusSoftware:develop8from
swmal merged 1 commit intoEPPlusSoftware:develop8from
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Fixed a bug where the internal string comparer in EPPlus sorting hard-coded StringComparison.CurrentCulture, effectively ignoring the CompareOptions (like Ordinal or IgnoreCase) provided by the user. - Updated EPPlusSortComparerBase to use Culture and CompOptions properties. - Added unit tests to verify linguistic and ordinal case-sensitivity.
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@lievendf - thank you for this PR. It will be included in the next version of EPPlus. |
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Description
This PR fixes an issue where range sorting in EPPlus 8 failed to respect the
CompareOptionsset inRangeSortOptions. The internal comparison logic was hard-coded to useStringComparison.CurrentCulture, which prevented users from performing true case-sensitive (Ordinal/Binary) sorts or using specific linguistic rules.Changes
OfficeOpenXml.Sorting.Internal.EPPlusSortComparerBaseto use theCultureandCompOptionsproperties during string comparisons instead of a hard-coded value.CultureInfo.CurrentCultureonly if no specific culture is provided.Verification
Added a new test class
EPPlusTest.Sorting.SortCaseSensitivityTestswith the following test cases:ShouldRespectCaseSensitivity: Verifies that linguistic case-sensitive sorting (a < A) works as expected.ShouldRespectOrdinalCaseSensitivity: Verifies that binary/ordinal sorting (A < a) correctly positions uppercase letters first.All tests passed for both .NET 8.0 and .NET 4.8.1 targets.