2026 v1

Chart

Bug Fixes

• [.NET] Fixed an issue where FlexPie data labels did not render correctly.

Core

Bug Fixes

• [.NET] Fixed an issue where the TypographyExtensions caused header text to freeze after applying the MaterialDark theme.

• [.NET] Fixed issue where icons did not display in the Icon Sets drop-down of the Segments section in RulesManager.

• [.NET] Fixed an issue where the core value access function threw a System.Reflection.AmbiguousMatchException during property resolution when the target type defined multiple default properties.

• [.NET Framework] Fixed an issue where C++/CLI applications using C1 WinForms controls displayed the ComponentOne License Not Found dialog despite a valid SA3 license.

FlexChart

Bug Fixes

• [.NET Framework] Fixed an issue where running the AnimationDemo and DrillDown samples triggered a System.Reflection.TargetInvocationException.

• [.NET Framework] Fixed an issue where dragging FlexPie or Sunburst controls onto a form after installing the C1.Xaml.WPF.FlexChart NuGet package triggered a System.NullReferenceException.

FlexDiagram

Bug Fixes

• [.NET] Fixed an issue where setting FlexDiagram.ItemsSource to a string caused a System.NullReferenceException.

FlexGrid.Filter

Bug Fixes

• [.NET] Fixed an issue where the Select All checkbox in the column filter did not display the indeterminate state when a theme was applied.

FlexReport

Improvements

• Added Radar Chart field support.

GanttView

Bug Fixes

• [.NET] Fixed an issue where setting all tier visibility values to false with AutomationProperties.Enabled=True caused a System.NullReferenceException.

Gauge

Bug Fixes

• [.NET] Fixed an issue where the default gauge pointer color changed from previous builds.

• [.NET] Fixed an issue where the OnValueChanged and ValueChanged events did not trigger when values were updated.

• [.NET] Fixed an issue where values greater than 87 returned NaN when IsReversed was enabled.

• [.NET] Fixed an issue where out-of-range StartAngle and SweepAngle values caused rendering to freeze.

• [.NET] Fixed an issue where mark decorators overlapped because of collisions in the marks implementation.

• [.NET] Improved gauge decorator styling consistency by moving BorderBrush, BorderWidth, and BorderDashes properties to the base GaugeDecorators class.

Grid

Breaking Changes

• [.NET] Removed AutomationEnabledProperty. AutomationEnabled is now implemented as a CLI property.

• [.NET] Updated the CanDragRow and CanDragColumn method signatures in GridCellFactory to accept four parameters.

Improvements

• [.NET] Added the Offset property to GridDateTimeOffset.

• [.NET] Improved column auto-generation to create GridDateTimeColumn objects for date and time data types.

• [.NET] Added IAutomationProperties interface support.

• [.NET] Added nullable Boolean support for AutomationEnabled.

• [.NET] Added the LostFocusEditMode property.

• [.NET] Added support for clearing cell values when deselecting a ComboBox editor in a nullable DataMap column.

Bug Fixes

• [.NET Framework] Fixed an issue where the text box did not receive focus when editing a cell containing a toggle icon.

• [.NET Framework] Fixed an issue where toggling a group updated the scroll position before selection, causing incorrect cell selection.

• [.NET] Fixed an issue where drag-and-drop row reordering failed when TransposedGridBehavior was applied.

• [.NET] Fixed an issue where incorrect adapter dimensions caused row ActualHeight values to report incorrect sizes.

• [.NET] Fixed an issue where selecting Sort By from the sort drop-down triggered a System.ArgumentOutOfRangeException.

• [.NET] Fixed an issue where resizing or scrolling in a secondary XAML window threw a System.ArgumentOutOfRangeException when AutomationEnabled=True and TransposedGridBehavior was applied.

• [.NET] Fixed an issue where DataMap drop-down items in GridColumn did not populate when edit mode was entered by double-clicking a cell.

• [.NET] Fixed an issue where selecting Apply or Clear in GridFilterRow options caused a NullReferenceException.

• [.NET] Fixed an issue where accessing CellFactory and PropertyInfo on unattached columns caused a NullReferenceException.

• [.NET] Fixed an issue where mouse wheel scrolling caused a System.ArgumentOutOfRangeException.

• [.NET] Fixed an issue where setting Aggregate and Format on DateTime columns with GridSummaryRow caused exceptions.

• [.NET] Fixed an issue where grouping and aggregation failed with FlexGridDetailProvider. Group collapse and aggregate calculations were applied only to the first row in each group.

• [.NET] Fixed an issue where checkbox editing could not be canceled when the Cancel property was set to true in the BeginningEdit or BeginningRowEdit events.

GridControl

Improvements

• [.NET] Added the LostFocusEditMode property.

Bug Fixes

• [.NET] Fixed an issue where layout values exceeded valid bounds by enforcing value clamping.

• [.NET] Fixed an issue where a custom mouse cursor set through Mouse.OverrideCursor reverted to the default cursor when hovering over the grid.

Grid.Excel

Bug Fixes

• [.NET] Fixed an issue where export failed because of a DS.Documents.Excel dependency version mismatch. Updated the referenced version to 7.2.5.

Input

Breaking Changes

• [.NET] Removed the HeaderClickInterceptor and ComboHeader template parts. Replaced them with Header and TextBox.

• [.NET] Renamed C1ComboBoxSelectionMode to ComboBoxSelectionMode.

• [.NET] Renamed C1ComboBoxItem and C1ComboBoxGroupItem to ComboBoxItem and ComboBoxGroupItem.

• [.NET] Removed C1ComboBox.IsOpenKey().

Improvements

• [.NET] Added the C1AutoCompleteTextBox.Complete() method.

Bug Fixes

• [.NET] Fixed an issue where the ComboBox drop-down could not be reopened after selecting an item.

• [.NET] Fixed an issue where the ComboBox drop-down did not open automatically when IsDropDownOpen was set to true.

• [.NET] Fixed an issue where a System.ArgumentOutOfRangeException occurred in C1.DataCollection.dll when Enter was pressed after focusing the text area.

• [.NET] Fixed an issue where a System.NullReferenceException occurred in SelectionChanged when handling ComboBox items separated by spaces.

• [.NET] Fixed an issue where C1DockControl UI elements, including content, tabs, and buttons, were not exposed in the UI visual tree.

• [.NET] Fixed an issue where a System.Exception occurred when a reset notification was received from the data source.

• [.NET] Fixed an issue where the ValidateInput event of C1ComboBox did not trigger on text input or item selection changes.

ListView

Breaking Changes

• [.NET] Removed the ShowCaption visual state group and renamed the Caption template to SelectAll.

• [.NET] Removed the unused ViewportGap and ViewportPreviewGap properties.

Improvements

• [.NET] Improved UI automation support.

• [.NET] Added IAutomationProperties support.

Bug Fixes

• [.NET] Fixed an issue where ItemTemplate was applied incorrectly to grouped items when grouping was enabled and no GroupStyle was defined.

• [.NET] Fixed an issue where newly added ListViewItem content did not render when added through the Items collection editor while C1ListView was bound to C1PropertyGrid.

• [.NET] Fixed an issue where running the TreeViewExplorer sample caused a System.ArgumentOutOfRangeException in C1.DataCollection.dll.

• [.NET] Fixed an issue where the Select All checkbox remained enabled even when CanSelectAll was set to false.

• [.NET] Fixed an issue where a ListViewItem was not selected at runtime even though IsSelected was set to True at design time.

• [.NET] Fixed an issue where SelectedIndex set in XAML was not applied correctly and later ItemsSource updates did not properly refresh the selection state.

• [.NET] Fixed an issue where deselection in SelectionMode=Multiple did not clear selected items.

• [.NET] Fixed an issue where PageUp and PageDown navigation caused a System.ArgumentOutOfRangeException after runtime data source updates.

• [.NET] Fixed an issue where the automation peer threw exceptions when accessing non-visible items.

RichTextBox

Bug Fixes

• [.NET Framework] Fixed an issue where tables with merged cells rendered inconsistently.

TabControl

Improvements

• [.NET] Added IAutomationProperties support.

Theming

Bug Fixes

• [.NET Framework] Fixed an issue where the Select All checkbox in the FlexGrid filter drop-down did not display the indeterminate state when themes were applied.