ComponentOne Studio Blazor Edition Releases

MESCIUSUI & Visualization Suites.NET
Version 2026 v2 (Nov 3, 2026)(1)

Learn what's new across releases, with details of features, enhancements, and resolved issues.

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ComponentOne Studio Blazor Edition 2026 v2Nov 3, 2026
Features
  • Calendar
    • Added keyboard navigation support to C1Calendar.
    • Implemented keyboard navigation for months and years using arrow keys in C1Calendar.
    • Updated the days panel to allow confirmation via Enter or Space.
    • Updated arrow key navigation to require an explicit Enter or Space key press instead of automatic confirmation on keyup.
    • Implemented focusing when switching between views.
  • ColorPicker
    • Added the C1ColorPicker control.
  • DataFilter
    • Changed the type of template part "SearchBox" of CheckListFilterPresenter from TextBox to C1TextBox.
    • Added support for configuring the time components displayed in the DateTimeFilter, DateTimeOffsetFilter, DateTimeRangeFilter, and DateTimeOffsetRangeFilter time editor via the TimeComponents property.
    • Added options to the TextFilter to enable case-sensitive and whole-word matching during filtering.
  • DateTimeEditors
    • Implemented cyclic Tab keyboard navigation for a nested calendar.
    • Implemented keyboard navigation for C1DateRangePicker.
    • Added support for configuring the time components displayed in the C1DateTimePicker and C1TimeEditor time editor via the TimeComponents property.
  • FlexGrid
    • Changed alternate rows to be the even rows by default. The previous behavior can be achieved using the introduced AlternatingRows property.
    • Removed the AutoGenerateFilters property from GridColumnFilterLoadingEventArgs.
    • Added a Remove Filter menu item to the column header options menu.
    • Modified the drop-down of GridFilterRow to display all filter menus, improving compatibility with ExcelLikeFilterBehavior.
    • Added AlternatingRowHeaderStyle, AlternatingRowHeaderBackground, and AlternatingRowHeaderForeground properties.
    • Added AlternatingStrategy and AlternatingRows properties.
    • Added the ShowConditionalFilterMenu property to enable condition-based filtering through the column-header menu for text, numeric, and date columns.
  • Gauge
    • Added keyboard support for changing gauge values with the arrow keys.
    • Added a Decorators collection property. Labels, Marks, and Pointers can be added in addition to existing Ranges.
    • Added a ShowRangePointer property, which indicates whether the range pointer is shown.
    • Converted color properties to Brush properties to allow gradients.
  • Input
    • Removed the public property C1ComboBox.SelectedItemsContent; it was for internal usage.
    • Added the ValueChangeMode property with SliderValueChangeMode.OnChange to C1Slider to improve pointer drag performance by updating the thumb on the client and synchronizing the slider value when pointer interaction completed.
  • ListView
    • Added Ctrl+A keyboard handling to select and unselect all items.
  • TreeView
    • Enabled expanding and collapsing nodes from the expand/collapse icon area during drag-and-drop.
Fixes
  • Calendar
    • Fixed an issue where C1Calendar allowed date selection when SelectionMode was set to None.
  • ColorPicker
    • Fixed an issue where the C1ColorPicker focus indicator did not match other C1 Blazor controls.
  • Core
    • Fixed an issue where Japanese products were added to the SA3 client when installing the English NuGet package.
    • Fixed an issue where the Class property was not applied to the rendered root element of C1ToggleButton.
    • Fixed an issue where core rendering did not draw ellipses.
  • DateTimeEditors
    • Fixed an issue where the C1DateRangePicker drop-down closed when pressing arrow keys to select a date while the drop-down was open.
  • FlexChart
    • Fixed an issue where tooltips were not displayed when ChartType was set to Area or Column in FlexRadar.
  • FlexGrid
    • Fixed an issue where the column-header background was not updated correctly when changing the grid Background.
    • Fixed an unhandled exception that occurred when clicking sort menus and the underlying data collection threw an exception.
    • Fixed an issue where the ColumnOptionsLoading event could not be canceled even when the Cancel property was set to true.
    • Fixed an issue where the selected style was applied incorrectly when selecting the same row multiple times.
    • Fixed an issue where filtering by column DataMap values not present in ItemsSource did not work.
  • Gauge
    • Fixed an issue where C1LinearGauge did not re-render correctly when Direction changed between horizontal and vertical orientations.
  • GridControl
    • Fixed an exception in the cells panel when moving columns.
  • Input
    • Fixed an issue where C1ComboBox displayed inconsistent keyboard focus indicators across editable, non-editable, and full-screen modes.
    • Fixed an issue where C1ComboBox selection was not displayed correctly when the selected items were duplicated.
    • Fixed an issue where C1MaskedTextBox did not apply PromptChar when initializing masked text.
    • Fixed an issue where C1ComboBox exhibited incorrect keyboard navigation behavior.
    • Fixed an issue where typing text that was not valid for the currently selected item in C1ComboBox did not reset the selection.
  • ListView
    • Fixed an issue where the SelectAll checkbox was incorrectly disabled when SelectionMode was set to None.
    • Fixed an issue where the SizeChanged event was not detached on disposal.
  • Ribbon
    • Fixed an issue where the keyboard focus indicator was displayed twice in C1SelectTool.
  • TreeView
    • Fixed an issue where TreeViewDragDropEventArgs.DropPosition during drag-over did not reflect the actual drop target position.
ComponentOne Studio Blazor Edition 2026 v1.2Aug 12, 2026
Features
  • ListView
    • Added support for the SelectedIndexes property.
  • TreeView
    • Added support for automatic scrolling when items are dragged between TreeView controls.
    • Added support for scrolling on touch devices.
Fixes
  • Core
    • Fixed an issue where 2D text did not render when a non-solid foreground brush was used.
    • Fixed an issue where 2D rendering threw an exception when gradient brushes were used.
    • Fixed an issue where an exception was thrown when FlexGrid was exported with a null background.
  • Gauge
    • Fixed an issue where labels in LinearGauge were clipped.
    • Fixed an issue where the Min, Max, and Value labels were misaligned in LinearGauge and BulletGraph.
  • Grid
    • Fixed an issue where the cursor cell did not display the SelectionBackground color when a row was selected.
  • Input
    • Fixed an issue where selected items were not displayed correctly in C1ComboBox when duplicate items were selected.
    • Fixed an issue where text for the Is One Of filter operation in FilterEditor was displayed in uppercase when a Material theme was applied.
    • Fixed an issue where keyboard focus moved to a disabled C1MultiSelectItem when the Down Arrow key was pressed in C1MultiSelect.
    • Fixed an issue where a disabled C1MultiSelectItem was selected when the Enter key was pressed in C1MultiSelect.
  • ListView
    • Fixed an issue where the BringIntoView method did not work correctly in C1TileListView.
    • Fixed an issue where the selected-item indicator was not visible when an item was selected on the Virtual Mode page.
    • Fixed an issue where the layout was incorrect when an item's width was less than the scroll viewer width in C1TileListView.
    • Fixed an issue where C1ListView incorrectly selected the second item after C1ListView.SelectAll() was called twice when SelectionMode was set to Single.
    • Fixed an issue where FocusIndex was not updated correctly when items were cleared, replaced, or removed in MultiSelect mode.
    • Fixed an issue where the Select All label was not displayed in C1TileListView.
    • Fixed an issue where the UI did not update when the ListViewItem.IsEnabled property was changed at runtime.
    • Fixed an issue where C1TileListView entered ZoomIn mode instead of selecting an item when the Select All checkbox was displayed and the item's text was clicked.
  • TreeView
    • Fixed an issue where invalid drop-target indicators were displayed when virtualized items were scrolled during drag-and-drop operations.
    • Fixed an issue where the scroll position moved to the last visited item when a navigation key was pressed during a drag-and-drop operation.
ComponentOne Studio Blazor Edition 2026 v1.1Jul 10, 2026
Features
  • Grid
    • Breaking changes - Updated the default value of GridRow.AllowCustomCells to true so that unbound GridRow scenarios use text-rendered cells by default.
Fixes
  • DateTimeEditors
    • Fixed an issue where the time editor portion of the C1DateTimePicker did not apply 24-hour time formats.
  • Gauge
    • Fixed an issue where the Bad, Good, and Target ranges in C1BulletGraph were affected by changes to the Origin value.
    • Fixed an issue where marks, labels, and pointers were rendered incorrectly in C1LinearGauge when Direction was set to Left, Up, or Down.
  • Grid
    • Fixed an issue where the AllowMerging property was not applied to GridGroupRow rows.
    • Fixed an issue where column alignment settings were not bound for GridGroupRow rows when WordWrap was enabled.
    • Fixed an issue where keyboard input was not applied in quick edit mode in C1FlexGrid.
  • GridControl
    • Fixed an issue where items could not be selected from property dropdown settings in Chromium-based browsers after a recent Chromium update.
  • Input
    • Fixed an issue where displayed items in C1ComboBox were not updated following DisplayMemberPath changed at run time following a selection.
    • Fixed an issue where C1ComboBox did not render selected values correctly when certain themes were applied.
    • Fixed an issue where items could not be selected from property dropdown settings in Chromium-based browsers after a recent Chromium update.
  • ListView
    • Fixed an issue where displayed items in ListView were not updated after DisplayMemberPath changed at run time following a selection.
  • Menu
    • Fixed an issue where items could not be selected from property dropdown settings in Chromium-based browsers after a recent Chromium update.
  • Ribbon
    • Fixed an issue where selection resolution was inconsistent between SelectedIndex and SelectedItem in C1SelectTool.
ComponentOne Studio Blazor Edition 2026 v1Major versionJun 3, 2026
Features
  • Gauge
    • 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.
    • Added shared JavaScript code to the Core library.
  • Grid
    • Added support for the default browser context menu when FlexGrid.ShowSelectionMenu is set to false.
    • Added the Offset property to GridDateTimeOffset.
    • Improved column auto-generation to create GridDateTimeColumn objects for date and time data types.
    • Added hover style support through the MouseOverBrush and MouseOverMode properties.
    • Added support for clearing cell values when deselecting a ComboBox editor in a nullable DataMap column.
  • Input
    • Added the C1AutoCompleteTextBox.Complete() method.
  • ListView
    • Improved UI automation support.
Fixes
  • Core
    • Fixed an issue where the core value access function threw an AmbiguousMatchException when the target type defined multiple default properties.
  • FlexViewer
    • 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
    • Fixed an issue where the default gauge pointer color changed from previous builds.
    • Fixed an issue where Value and Max text did not render correctly when the StartAngle and SweepAngle properties were set to non-default values.
    • Fixed an issue where LinearGauge and BulletGraph displayed inconsistent height and text clipping compared to previous builds.
    • Fixed an issue where out-of-range StartAngle and SweepAngle values caused rendering to freeze.
    • Fixed an issue where mark decorators overlapped because of 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 NaN when IsReversed was enabled.
  • Grid
    • 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 XAML 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 XAML 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 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 could not be canceled when the Cancel property was set to true in the BeginningEdit or BeginningRowEdit events.
    • Breaking Changes
      • Updated the CanDragRow and CanDragColumn method signatures in GridCellFactory to accept four parameters.
  • Grid.Excel
    • Fixed an issue where export failed because of a DS.Documents.Excel dependency version mismatch. Updated the referenced version to 7.2.5.
  • GridControl
    • Fixed an issue where layout values exceeded valid bounds by enforcing value clamping.
    • Fixed an issue where custom tab navigation did not work correctly when merged cells were used.
  • Input
    • Fixed an issue where items in C1ComboBox and C1AutoComplete could not be deselected when clearing the text box.
    • 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.
    • 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().
  • ListView
    • 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 XAML 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.
    • Breaking Changes
      • Removed the ShowCaption visual state group and renamed the Caption template to SelectAll.
      • Removed the unused ViewportGap and ViewportPreviewGap properties.
  • Ribbon
    • Fixed an issue where SelectTool had inconsistent selection behavior by using a single source of truth for SelectedIndex and SelectedItem, with SelectedIndex taking precedence when specified.
    • Breaking Changes
      • Removed the setter for C1ToolSeparator.Orientation. The property is now read-only.