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WinForms Edition Release History
- 2025 v2.1
- 2025 v2
- 2025 v1.2
- 2025 v1.1
- 2025 v1
- 2024 v2.2
- 2024 v2.1
- 2024 v2
- 2024 v1
- 2023 v3
- 2023 v2
- 2023 v1
- 2022 v3
- 2022 v2
- 2022 v1
- 2021 v3
- 2021 v2
- 2021 v1
- 2020 v3
- 2020 v2
- 2020 v1
- 2019 v3
- 2019 v2
- 2019 v1
- 2018 v3
- 2018 v2
- 2018 v1
- 2017 v3
- 2017v2
- 2017 v1
- 2016 v3.5
- 2016 v3
- 2016 v2.5
- 2016 v2
- 2016 v1.5
- 2016 v1
- 2015 v3.5
- 2015 v3
- 2015 v2.5
- 2015 v2
- 2015 v1
- 2014 v3
- 2014 v2
- 2014 v1. 1
- 2014 v1
- 2013 v3
- 2013 v2
- 2013 v1
- 2012 v3
- 2012 v2
- 2012 v1
- 2011 v3
- 2011 v2
2025 v2.1
Calendar
Bug fixes
Fixed incorrect initial selection of date part instead of month when using custom format "MM/dd/yyyy".
Command
Bug fixes
Fixed NullReferenceException in C1CommandDock when canceling QueryAllowDrop event and DockingStyle is non-default.
Fixed tab navigation issue with Up Arrow key when Alignment is Left or Right and a tab is hidden.
Diagram
Improvements
Added keyboard navigation for panning and zooming in FlexDiagram: Use arrow keys to pan, Ctrl + (+) or Ctrl + (–) to scale, and Ctrl + 0 to reset zoom.
Minor API changes: Use platform style in event arguments, set node data before NodeCreated event fires, fixed Diagram Rendering/Rendering events to fire, added EdgeCreated event.
Added FlexDiagram NodeStyle and EdgeStyle properties to define default appearance of nodes and edges.
Editor
Bug fixes
[.NET Framework] Fixed exception when loading EditorMode as Preview in RTF Editor due to unhandled XML parsing.
FlexGrid
Improvements
Updated scrollbar annotations API: Added OnScrollBarAnnotationsUpdating and OnScrollBarAnnotationsUpdated methods.
Added support for saving FlexGrid data in .xls, .xlsx, .csv, .xlsm, and .xltx formats using SaveExcel method.
Bug fixes
Fixed text wrapping despite sufficient column width when Styles.Normal.WordWrap is disabled.
Fixed search failure for strings containing colon (e.g., "d:") when using ApplySearch, now treating them as substrings.
Fixed an ArgumentOutOfRangeException in C1.Win.FlexGrid that occurred when navigating Column Filter Editor tabs using the keyboard.
Fixed missing export of grid background colors using SystemColors.Control to Excel, now preserving colors with gridlines.
Fixed inconsistent r1 and r2 values in BeforeRowColChange event's NewRange when clicking column header.
Fixed scrolling issue preventing navigation across custom merged ranges.
Fixed performance degradation when subtotaling large number of rows with tree column enabled.
Fixed the ShowSortPositionEnum.Right option for column headers so that sorting markers display correctly on the right when sorting is applied with column filters.
FlexReport
Bug fixes
Fixed PageSettings swapping width and height when height is less than width, ensuring correct layout on load.
FlexViewer
Bug fixes
Fixed a NullReferenceException thrown in FlexViewer when closing the MainRibbonForm.
Input
Bug fixes
Fixed UI performance and rendering distortion in forms with TableLayoutPanel containing auto-sized C1Label.
Fixed ArgumentNullException in C1TextBox when pasting null string.
Fixed ignored buffered key input in C1TextBox during form loading, now applying keystrokes on focus.
List
Bug fixes
Fixed an issue in C1Combo where resetting the DataSource after selecting an item caused an unhandled exception.
Themes
Bug fixes
Fixed theme application failure for forms inherited from abstract MS Form base classes.
TrueDBGrid
Improvements
Added support for saving C1TrueDBGrid data in .xls, .xlsx, .csv, .xlsm, and .xltx formats using SaveExcel method.
Bug fixes
Fixed an issue in C1TrueDBGrid where cell contents wrapped instead of being trimmed when Normal style had VerticalAlignment set to Center, Wrap set to NoWrap, and Trimming set to Character.
Fixed AmbiguousMatchException when saving and loading layout from empty grid.