# 2026 v1

## Content

## Chart

**Bug Fixes**

* Fixed an issue where FlexPie data labels did not render correctly.

## Core

**Bug Fixes**

* Fixed an issue where bindings failed when the `ItemsSource` property in `C1ItemsControl` was hidden by using the `new` modifier.
* Fixed an issue where the core value access function threw an `AmbiguousMatchException` when the target type defined multiple default properties.

## FlexViewer

**Bug Fixes**

* Fixed an issue where the application stopped responding when the PopupCard icon was clicked in FlexViewerExplorer on Android using Visual Studio 2026.
* Fixed an issue where a `System.Exception` occurred when loading report data with parameters on mobile platforms.
* Fixed an issue where a `System.Exception` occurred when loading report data containing charts on mobile platforms.
* Fixed an issue where chart data did not render when loading report data containing charts on mobile platforms.

## Gauge

**Bug Fixes**

* Fixed an issue where out-of-range `StartAngle` and `SweepAngle` values caused rendering to freeze.
* Improved gauge decorator styling consistency by moving `BorderBrush`, `BorderWidth`, and `BorderDashes` properties to the base `GaugeDecorators` class.
* Removed the `StrokeThickness` property from `GaugePointer` and `GaugeMark`.
* Fixed an issue where mark decorators overlapped due to collisions in the marks implementation.
* Fixed an issue where the `OnValueChanged` and `ValueChanged` events did not trigger when values were updated.
* Fixed an issue where values greater than 87 returned `<span data-testid="definition-highlighter" style="--_11qfq0e: solid;" class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke">NaN</span>` when `IsReversed` was enabled.

## Grid

**Breaking Changes**

* Removed `AutomationEnabledProperty`. `AutomationEnabled` is now implemented as a CLI property.
* Updated the `CanDragRow` and `CanDragColumn` method signatures in `GridCellFactory` to accept four parameters.

**Improvements**

* Added support for clearing cell values when deselecting a ComboBox editor in a nullable `DataMap` column.
* Added the `Offset` property to `GridDateTimeOffset`.
* Improved column auto-generation to create `GridDateTimeColumn` objects for date and time data types.
* Added `IAutomationProperties` interface support.
* Added nullable Boolean support for `AutomationEnabled`.

**Bug Fixes**

* Fixed an issue where opening column option menus in `TransposedGrid` threw a `System.ArgumentOutOfRangeException` when all rows were frozen and `AutomationEnabled=True`.
* Fixed an issue where assigning the `CellFactory` property failed when the factory was already linked.
* Fixed an issue where adding multiple columns through <span data-testid="definition-highlighter" style="--_11qfq0e: solid;" class="_5pioz8co _189e1dm9 _1il9buyh _19lc184f _d0altlke">XAML</span> caused a `System.ArgumentOutOfRangeException`.
* Fixed an issue where drag-and-drop row reordering failed when `TransposedGridBehavior` was applied.
* Fixed an issue where incorrect adapter dimensions caused row `ActualHeight` values to report incorrect sizes.
* Fixed an issue where selecting **Sort By** from the sort drop-down triggered a `System.ArgumentOutOfRangeException`.
* Fixed an issue where resizing or scrolling in a secondary <span data-highlighted="true" data-vc="highlighted-text">XAML</span> window threw a `System.ArgumentOutOfRangeException` when `AutomationEnabled=True` and `TransposedGridBehavior` was applied.
* Fixed an issue where `DataMap` drop-down items in `GridColumn` did not populate when edit mode was entered by double-clicking a cell.
* Fixed an issue where selecting **Apply** or **Clear** in `GridFilterRow` options caused a `NullReferenceException`.
* Fixed an issue where accessing `CellFactory` and `PropertyInfo` on unattached columns caused a `NullReferenceException`.
* Fixed an issue where mouse wheel scrolling caused a `System.ArgumentOutOfRangeException`.
* Fixed an issue where setting `Aggregate` and `Format` on `DateTime` columns with `GridSummaryRow` caused exceptions.
* Fixed an issue where filtered results displayed incorrectly after editing a merged cell value from the column options menu.
* 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.
* Fixed an issue where checkbox editing was not canceled when the `Cancel` property was set to `true` in the `BeginningEdit` or `BeginningRowEdit` events.

## Grid.Excel

**Bug Fixes**

* Fixed an issue where export failed because of a `DS.Documents.Excel` dependency version mismatch. Updated the referenced version to 7.2.5.

## GridControl

**Bug Fixes**

* Fixed an issue where layout values exceeded valid bounds by enforcing value clamping.

## Input

**Breaking Changes**

* Removed the `HeaderClickInterceptor` and `ComboHeader` template parts. Replaced them with `Header` and `TextBox`.
* Renamed `C1ComboBoxSelectionMode` to `ComboBoxSelectionMode`.
* Renamed `C1ComboBoxItem` and `C1ComboBoxGroupItem` to `ComboBoxItem` and `ComboBoxGroupItem`.
* Removed `C1ComboBox.IsOpenKey()`.

**Improvements**

* Added the `C1AutoCompleteTextBox.Complete()` method.

**Bug Fixes**

* Fixed an issue where text matching failed in `C1ComboBox` when `Condition=Contains` and `IsEditable=False`.
* Fixed an issue where a `System.Exception` occurred when a reset notification was received from the data source.

## ListView

**Breaking Changes**

* Removed the `ShowCaption` visual state group and renamed the `Caption` template to `SelectAll`.
* Removed the unused `ViewportGap` and `ViewportPreviewGap` properties.

**Improvements**

* Added a new ListView library.
* Added `IAutomationProperties` support to ListView.
* Improved UI automation support.

**Bug Fixes**

* Fixed an issue where navigating suggestions in `ExpressionEditor` with the Down arrow key caused an `InvalidOperationException` when scrolling reached the next visible view.
* Fixed an issue where newly added `ListViewItem` content did not render when added through the Items collection editor while `C1ListView` was bound to `C1PropertyGrid`.
* Fixed an issue where the **Select All** checkbox remained enabled even when `CanSelectAll` was set to `false`.
* Fixed an issue where selection failed when `IsSelected` was set before the item was added to the Items collection.
* Fixed an issue where `SelectedIndex` set in <span data-highlighted="true" data-vc="highlighted-text">XAML</span> was not applied when `ItemsSource` was assigned later.
* Fixed an issue where deselection in `SelectionMode=Multiple` did not clear selected items.
* Fixed an issue where `PageUp` and `PageDown` navigation caused a `System.ArgumentOutOfRangeException` after runtime data source updates.
* Fixed an issue where the automation peer threw exceptions when accessing non-visible items.
* Fixed an issue where `ItemTemplate` was applied incorrectly to grouped items when no `GroupStyle` was defined.