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What's new in the Open XML SDK

[3.0.0] - 2023-11-15

Added

  • Packages can now be saved on .NET Core and .NET 5+ if constructed with a path or stream (#1307).
  • Packages can now support malformed URIs (such as relationships with a URI such as mailto:person@)
  • Introduce equality comparers for OpenXmlElement (#1476)
  • IFeatureCollection can now be enumerated and has a helpful debug view to see what features are registered (#1452)
  • Add mime types to part creation (#1488)
  • DocumentFormat.OpenXml.Office.PowerPoint.Y2023.M02.Main namespace
  • DocumentFormat.OpenXml.Office.PowerPoint.Y2022.M03.Main namespace
  • DocumentFormat.OpenXml.Office.SpreadSheetML.Y2021.ExtLinks2021 namespace

Changed

  • When validation finds incorrect part, it will now include the relationship type rather than a class name
  • IDisposableFeature is now a part of the framework package and is available by default on a package or part.

Breaking Changes

  • .NET Standard 1.3 is no longer a supported platform. .NET Standard 2.0 is the lowest .NET Standard supported.
  • Core infrastructure is now contained in a new package DocumentFormat.OpenXml.Framework. Typed classes are still in DocumentFormat.OpenXml. This means that you may reference DocumentFormat.OpenXml and still compile the same types, but if you want a smaller package, you may rely on just the framework package.
  • Changed type of OpenXmlPackage.Package to DocumentFormat.OpenXml.Packaging.IPackage instead of System.IO.Packaging.Package with a similar API surface
  • EnumValue<T> now is used to box a struct rather than a System.Enum. This allows us to enable behavior on it without resorting to reflection
  • Methods on parts to add child parts (i.e. AddImagePart) are now implemented as extension methods off of a new marker interface ISupportedRelationship<T>
  • Part type info enums (i.e. ImagePartType) is no longer an enum, but a static class to expose well-known part types as structs. Now any method to define a new content-type/extension pair can be called with the new PartTypeInfo struct that will contain the necessary information.
  • OpenXmlPackage.CanSave is now an instance property (#1307)
  • Removed OpenXmlSettings.RelationshipErrorHandlerFactory and associated types and replaced with a built-in mechanism to enable this
  • IdPartPair is now a readonly struct rather than a class
  • Renamed PartExtensionProvider to IPartExtensionFeature and reduced its surface area to only two methods (instead of a full Dictionary<,>). The property to access this off of OpenXmlPackage has been removed, but may be accessed via Features.Get<IPartExtensionFeature>() if needed.
  • OpenXmlPart/OpenXmlContainer/OpenXmlPackage and derived types now have internal constructors (these had internal abstract methods so most likely weren't subclassed externally)
  • OpenXmlElementList is now a struct that implements IEnumerable<OpenXmlElement> and IReadOnlyList<OpenXmlElement> where available (#1429)
  • Individual implementations of OpenXmlPartReader are available now for each package type (i.e. WordprocessingDocumentPartReader, SpreadsheetDocumentPartReader, PresentationDocumentPartReader), and the previous TypedOpenXmlPartReader has been removed. (#1403)
  • Reduced unnecessary target frameworks for packages besides DocumentFormat.OpenXml.Framework (#1471)
  • Changed some spelling issues for property names (#1463, #1444)
  • Model3D now represents the modified xml element tag name am3d.model3d (Previously am3d.model3D)
  • Removed DocumentFormat.OpenXml.Office.SpreadSheetML.Y2022.PivotRichData.PivotCacheHasRichValuePivotCacheRichInfo
  • Removed DocumentFormat.OpenXml.Office.SpreadSheetML.Y2022.PivotRichData.RichDataPivotCacheGuid
  • Removed unused SchemaAttrAttribute (#1316)
  • Removed unused ChildElementInfoAttribute (#1316)
  • Removed OpenXmlSimpleType.TextValue. This property was never meant to be used externally (#1316)
  • Removed obsolete validation logic from v1 of the SDK (#1316)
  • Removed obsoleted methods from 2.x (#1316)
  • Removed mutable properties on OpenXmlAttribute and marked as readonly (#1282)
  • Removed OpenXmlPackage.Close in favor of Dispose (#1373)
  • Removed OpenXmlPackage.SaveAs in favor of Clone (#1376)

[2.20.0] - 2023-04-05

Added

  • Added DocumentFormat.OpenXml.Office.Drawing.Y2022.ImageFormula namespace
  • Added DocumentFormat.OpenXml.Office.Word.Y2023.WordML.Word16DU namespace

Changed

  • Marked OpenXmlSimpleType.TextValue as obsolete. This property was never meant to be used externally (#1284)
  • Marked OpenXmlPackage.Package as obsolete. This will be an implementation detail in future versions and won't be accessible (#1306)
  • Marked OpenXmlPackage.Close as obsolete. This will be removed in a later release, use Dispose instead (#1371)
  • Marked OpenXmlPackage.SaveAs as obsolete as it will be removed in a future version (#1378)

Fixed

  • Fixed incorrect file extensions for vbaProject files (#1292)
  • Fixed incorrect file extensions for ImagePart (#1305)
  • Fixed incorrect casing for customXml (#1351)
  • Fixed AddEmbeddedPackagePart to allow correct extensions for various content types (#1388)

[2.19.0] - 2022-12-14

Added

  • .NET 6 target with support for trimming (#1243, #1240)
  • Added DocumentFormat.OpenXml.Office.SpreadSheetML.Y2022.PivotRichData namespace
  • Added DocumentFormat.OpenXml.Office.PowerPoint.Y2019.Main.Command namespace
  • Added DocumentFormat.OpenXml.Office.PowerPoint.Y2022.Main.Command namespace
  • Added Child RichDataPivotCacheGuid to DocumentFormat.OpenXml.Office2010.Excel.PivotCacheDefinition

Fixed

  • Removed reflection usage where possible (#1240)
  • Fixed issue where some URIs might be changed when cloning or creating copy (#1234)
  • Fixed issue in FlatOpc generation that would not read the full stream on .NET 6+ (#1232)
  • Fixed issue where restored relationships wouldn't load correctly (#1207)

[2.18.0] 2022-09-06

Added

  • Added DocumentFormat.OpenXml.Office.SpreadSheetML.Y2021.ExtLinks2021 namespace (#1196)
  • Added durableId attribute to DocumentFormat.OpenXml.Wordprocessing.NumberingPictureBullet (#1196)
  • Added few base classes for typed elements, parts, and packages (#1185)

Changed

  • Adjusted LICENSE.md to conform to .NET Foundation requirements (#1194)
  • Miscellaneous changes for better perf for internal services

[2.17.1] - 2022-06-28

Removed

  • Removed the preview namespace DocumentFormat.OpenXml.Office.Comments.Y2020.Reactions because this namespace will currently create invalid documents.

Fixed

  • Restored the PowerPointCommentPart relationship to PresentationPart.

Deprecated

  • The relationship between the PowerPointCommentPart and the PresentationPart is deprecated and will be removed in a future version.

[2.17.0] - Unreleased

Added

  • Added DocumentFormat.OpenXml.Office.Comments.Y2020.Reactions namespace (#1151)
  • Added DocumentFormat.OpenXml.Office.SpreadSheetML.Y2022.PivotVersionInfo namespace (#1151)

Fixed

  • Moved PowerPointCommentPart relationship to SlidePart (#1137)

Updated

  • Removed public API analyzers in favor of EnablePackageValidation (#1154)

[2.16.0] - 2022-03-14

Added

  • Added method OpenXmlPart.UnloadRootElement that will unload the root element if it is loaded (#1126)

Updated

  • Schema code generation was moved to the SDK project using C# code generators

[2.15.0] - 2021-12-16

Added

  • Added samples for strongly typed classes and Linq-to-XML in the ./samples directory (#1101, #1087)
  • Shipping additional libraries for some additional functionality in DocumentFormat.OpenXml.Features and DocumentFormat.OpenXml.Linq. See documentation in repo for additional details.
  • Added extension method to support getting image part type (#1082)
  • Added generated classes and FileFormatVersions.Microsoft365 for new subscription model types and constraints (#1097).

Fixed

  • Fixed issue for changed mime type model/gltf.binary (#1069)
  • DocumentFormat.OpenXml.Office.Drawing.ShapeTree is now available only in Office 2010 and above, not 2007.
  • Correctly serialize new CellValue(bool) values (#1070)
  • Updated known namespaces to be generated via an in-repo source generator (#1092)
  • Some documentation issues around FileFormatVersions enum

[2.14.0] - 2021-10-28

Added

  • Added generated classes for Office 2021 types and constraints (#1030)
  • Added Features property to OpenXmlPartContainer and OpenXmlElement to enable a per-part or per-document state storage
  • Added public constructors for XmlPath (#1013)
  • Added parts for Rich Data types (#1002)
  • Added methods to generate unique paragraph ids (#1000)

[2.13.1] - 2021-08-17

Fixed

  • Fixed some nullability annotations that were incorrectly defined (#953, #955)
  • Fixed issue that would dispose a TextReader when creating an XmlReader under certain circumstances (#940)
  • Fixed a documentation type (#937)
  • Fixed an issue with adding additional children to data parts (#934)
  • Replaced some documentation entries that were generic values with helpful comments (#992)
  • Fixed a regression in AddDataPartRelationship (#954)

[2.13.0] - 2021-05-13

Added

  • Additional O19 types to match Open Specifications (#916)
  • Added generated classes for Office 2019 types and constraints (#882)
  • Added nullability attributes (#840, #849)
  • Added overload for OpenXmlPartReader and OpenXmlReader.Create(...) to ignore whitespace (#857)
  • Added HexBinaryValue.TryGetBytes(...) and HexBinaryValue.Create(byte[]) to manage the encoding and decoding of bytes (#867)
  • Implemented IEquatable<IdPartPair> on IdPartPair to fix equality implementation there and obsoleted setters (#871)

Fixed

  • Fixed serialization of CellValue constructors to use invariant cultures (#903)
  • Fixed parsing to allow exponents for numeric cell values (#901)
  • Fixed massive performance bottleneck when UniqueAttributeValueConstraint is involved (#924)

Deprecated

  • Deprecated Office2013.Word.Person.Contact property. It no longer persists and will be removed in a future version (#912)

[2.12.3] - 2021-02-24

Fixed

  • Fixed issue where CellValue may validate incorrectly for boolean values (#890)

[2.12.2] - 2021-02-16

Fixed

  • Fixed issue where OpenSettings.RelationshipErrorHandlerFactory creates invalid XML if the resulting URI is smaller than the input (#883)

[2.12.1] - 2021-01-11

Fixed

  • Fixed bug where properties on OpenXmlCompositeElement instances could not be set to null to remove element (#850)
  • Fixed OpenXmlElement.RawOuterXml to properly set null values without throwing (#818)
  • Allow rewriting of all malformed URIs regardless of target value (#835)

[2.12.0] - 2020-12-09

Added

  • Added OpenSettings.RelationshipErrorHandlerFactory to provide a way to handle URIs that break parsing documents with malformed links (#793)
  • Added OpenXmlCompositeElement.AddChild(OpenXmlElement) to add children in the correct order per schema (#774)
  • Added SmartTagClean and SmartTagId in place of SmtClean and SmtId (#747)
  • Added OpenXmlValidator.Validate(..., CancellationToken) overrides to allow easier cancellation of long running validation on .NET 4.0+ (#773)
  • Added overloads for CellValue to take decimal, double, and int, as well as convenience methods to parse them (#782)
  • Added validation for CellType for numbers and date formats (#782)
  • Added OpenXmlReader.GetLineInfo() to retrieve IXmlLineInfo of the underlying reader if available (#804)

Fixed

  • Fixed exception that would be thrown if attempting to save a document as FlatOPC if it contains SVG files (#822)
  • Added SchemaAttrAttribute attributes back for backwards compatibility (#825)

Removed

  • Removed explicit reference to System.IO.Packaging on .NET 4.6 builds (#774)

[2.11.3] - 2020-07-17

Fixed

  • Fixed massive performance bottleneck when IndexReferenceConstraint and ReferenceExistConstraint are involved (#763)
  • Fixed CellValue to only include three most signficant digits on second fractions to correct issue loading dates (#741)
  • Fixed a couple of validation indexing errors that might cause erroneous validation errors (#767)
  • Updated internal validation system to not use recursion, allowing for better short-circuiting (#766)

[2.11.2] - 2020-07-10

Fixed

  • Fixed broken source link (#749)
  • Ensured compilation is deterministic (#749)
  • Removed extra file in NuGet package (#749)

[2.11.1] - 2020-07-10

Fixed

  • Ensure .NET Framework builds pass PEVerify (#744)
  • OpenXmlPartContainer.DeletePart no longer throws an exception if there isn't a match for the identifier given (#740)
  • Mark obsolete members to not show up with Intellisense (#745)
  • Fixed issue with AttributeRequiredConditionToValue semantic constraint where validation could fail on correct input (#746)

[2.11.0] - 2020-05-21

Added

  • Added FileFormatVersions.2019 enum (#695)
  • Added ChartSpace and chart elements for the new 2016 namespaces. This allows the connecting pieces for building a chart part with chart styles like "Sunburst" (#687).
  • Added OpenXmlElementFunctionalExtensions.With(...) extension methods, which offer flexible means for constructing OpenXmlElement instances in the context of pure functional transformations (#679)
  • Added minimum Office versions for enum types and values (#707)
  • Added additional CompatSettingNameValues values: UseWord2013TrackBottomHyphenation, AllowHyphenationAtTrackBottom, and AllowTextAfterFloatingTableBreak (#706)
  • Added gfxdata attribue to Arc, Curve, Line, PolyLine, Group, Image, Oval, Rect, and RoundRect shape complex types per MS-OI29500 2.1.1783-1799 (#709)
  • Added OpenXmlPartContainer.TryGetPartById to enable child part retrieval without exception if it does not exist (#714)
  • Added OpenXmlPackage.StrictRelationshipFound property that indicates whether this package contains Transitional relationships converted from Strict (#716)

Fixed

  • Custom derived parts did not inherit known parts from its parent, causing failure when adding parts (#722)

Changed

  • Marked the property setters in OpenXmlAttribute as obsolete as structs should not have mutable state (#698)

[2.10.1] - 2020-02-28

Fixed

  • Ensured attributes are available when OpenXmlElement is initialized with outer XML (#684, #692)
  • Some documentation errors (#681)
  • Removed state that made it non-thread safe to validate elements under certain conditions (#686)
  • Correctly inserts strongly-typed elements before known elements that are not strongly-typed (#690)

[2.10.0] - 2020-01-10

Added

  • Added initial Office 2016 support, including FileFormatVersion.Office2016, ExtendedChartPart and other new schema elements (#586)
  • Added .NET Standard 2.0 target (#587)
  • Included symbols support for debugging (#650)
  • Exposed IXmlNamespaceResolver from XmlPath instead of formatted list of strings to expose namespace/prefix mapping (#536)
  • Implemented IComparable<T> and IEquatable<T> on OpenXmlComparableSimpleValue to allow comparisons without boxing (#550)
  • Added OpenXmlPackage.RootPart to easily access the root part on any package (#661)

Changed

  • Updated to v4.7.0 of System.IO.Packaging which brings in a number of perf fixes (#660)
  • Consolidated data for element children/properties to reduce duplication (#540, #547, #548)
  • Replaced opaque binary data for element children constraints with declarative model (#603)
  • A number of performance fixes to minimize allocations where possible
  • 20% size reduction from 5.5mb to 4.3mb
  • The validation subsystem went through a drastic redesign. This may cause changes in what errors are reported.

Fixed

  • Fixed some documentation inconsistencies (#582)
  • Fixed ToFlatOpcDocument, ToFlatOpcString, FromFlatOpcDocument, and FromFlatOpcString to correctly process Alternative Format Import Parts, or "altChunk parts" (#659)

[2.9.1] - 2019-03-13

Changed

  • Added a workaround for a .NET Native compiler issue that doesn't support calling Marshal.SizeOf<T> with a struct that contains auto-implemented properties (#569)
  • Fixed a documentation error (#528)

[2.9.0] - 2018-06-08

Added

  • ListValue now implements IEnumerable<T> (#385)
  • Added a WebExtension.Frozen and obsoleted misspelled Fronzen property (#460)
  • Added an OpenXmlPackage.CanSave property that indicates whether a platform supports saving without closing the package (#468)
  • Simple types (except EnumValue and ListValue) now implement IComparable<T> and IEquatable<T> (#487)

Changed

  • Removed state that was carried in validators that would hold onto packages when not in use (#390)
  • EnumSimpleType parsing was improved and uses less allocations and caches for future use (#408)
  • Fixed a number of spelling mistakes in documentation (#462)
  • When calling OpenXmlPackage.Save on .NET Framework, the package is now flushed to the stream (#468)
  • Fixed race condition while performing strict translation of attributes (#480)
  • Schema data for validation uses a more compact format leading to a reduction in dll size and performance improvements for loading (#482, #483)
  • A number of APIs are marked as obsolete as they have simple workarounds and will be removed in the next major change
  • Fixed some constraint values for validation that contained Office 2007, even when it was only supported in later versions
  • Updated System.IO.Packaging to 4.5.0 which fixes some issues on Xamarin platforms as well as minimizes dependencies on .NET Framework

[2.8.1] - 2018-01-03

Changed

  • Corrected package license file reference to show updated MIT License

[2.8.0] - 2017-12-28

Added

  • Default runtime directive for better .NET Native support.

Changed

  • Fixed part saving to be encoded with UTF8 but no byte order mark. This caused some renderers to not be able to open the generated document.
  • Fixed exceptions thrown when errors are encountered while opening packages to be consistent across platforms.
  • Fixed issue on Mono platforms using System.IO.Packaging NuGet package (Xamarin, etc) when creating a document.
  • Fixed manual saving of a package when autosave is false.
  • Fixed schema constraint data and standardized serialization across platforms.
  • Upgraded to System.IO.Packaging version 4.4.0 which fixes some consistency with .NET Framework in opening packages.

[2.7.2] - 2017-06-06

Added

  • Package now supports .NET 3.5 and .NET 4.0 in addition to .NET Standard 1.3 and .NET Framework 4.6

Changed

  • Fixed issue where assembly version wasn't set in assembly.

[2.7.1] - 2017-01-31

Changed

  • Fixed crash when validation is invoked on .NET Framework with strong-naming enforced.

[2.7.0] - 2017-01-24

Added

  • SDK now supports .NET Standard 1.3

Changed

  • Moved to using System.IO.Packaging from dotnet/corefx for .NET Standard 1.3 and WindowsBase for .NET 4.5.
  • Cleaned up project build system to use .NET CLI.

[2.6.1] - 2016-01-15

Added

  • Added hundreds of XUnit tests. There are now a total of 1333 tests. They take about 20 minutes to run, so be patient.

[2.6.0] - 2015-06-29

Added

  • Incorporated a replacement System.IO.Packaging that fixes some serious (but exceptional) bugs found in the WindowsBase implementation