2026 v1

Calendar

Improvements

• Added the GetSelectedDateRange method to C1DateRangeEdit to retrieve the selected date range based on the current culture calendar.

• Added the C1DateRangeEdit control to display and edit date ranges through a drop-down editor.

Bug Fixes

• Fixed an issue where the selected date range did not render correctly in the C1DateRangeEdit drop-down calendar when SyncValueWithSelection=True.

• Fixed an issue where the selected date did not appear in the drop-down calendar when copied and pasted into C1DateEdit.

• Fixed an issue where the DateRangeSelected event did not trigger when selecting a date range in the C1DateRangeEdit drop-down calendar.

• Fixed an issue where the C1DateRangeEdit drop-down calendar closed after selecting disabled dates.

• Fixed an issue where the time component was lost when selecting a date from the C1DateEdit drop-down calendar even when RetainTimeOnDateChange=True.

• Fixed an issue where font formatting did not reset correctly when calling ResetFont in the DayFormatting event of C1DateEdit after selecting a day.

• Fixed an issue where PredefinedRange styles were reset at design time after closing and reopening the form.

Command

Improvements

• Added a design-time text editor for page tabs in C1DockingTabPage.

Document

Bug Fixes

• Fixed an issue where C1PdfDocumentSource rendered output as rasterized content instead of vector graphics, reducing print quality.

Editor

Bug Fixes

• Fixed an issue where calling LoadDocumentAsync or LoadDocumentRequestAsync before C1EditorReady could cause document loading failures.

ExpressionEditor

Bug Fixes

• Fixed a performance issue in ExpressionEditorCollection for control integration during expression evaluation.

FlexChart

Improvements

• Updated C1.Chart to version 10.0.20261.78.

Bug Fixes

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

• Fixed an issue where FlexRadar threw a System.InvalidCastException when RenderMode=DirectX and RadarChartType=Column.

• Fixed an issue where a System.NullReferenceException occurred when deleting a series at design time while an empty BindingSource was assigned as the data source.

FlexGrid

Improvements

• Added support for hiding empty groups and subtotals during filtering through the HideEmptyGroups property.

Bug Fixes

• Fixed an issue where changing views in the ThemeDesigner application caused an extra window to appear behind the form when opening the filter drop-down.

• Fixed an issue where clearing a filter after clearing the Select All checkbox in C1TableView threw a System.ArgumentOutOfRangeException.

• Fixed an issue where binding a DataTable displayed incorrect items in the ComboBox drop-down list.

• Fixed an issue where MaxDropDownItems for GridEditorComboBox stopped applying beyond a certain limit.

• Fixed an issue where dragging a column duplicated its contents on another screen.

• Fixed a performance issue when loading Excel files containing a large number of empty rows.

• Fixed an issue where AutoSizeRows did not support TextDirection.Down.

• Fixed an issue where changing the DropDownStyle of GridEditorComboBox degraded drop-down opening performance.

FlexPivot

Bug Fixes

• Fixed an issue where scrolling a numeric editor in the Custom tab of the ColorPicker drop-down threw a System.ArgumentException.

FlexReport

Improvements

• Added Radar Chart field support.

• Added Diagram Chart field support.

Bug Fixes

• Fixed an issue where Map custom fields failed to render in both C1FlexReportDesigner and C1FlexViewer.

FlexViewer

Improvements

• Added Pane.PagePointerEvent.

GanttView

Improvements

• Added StorageEditor editors for TasksStorage, ResourceStorage, PropertyStorage, and CalendarStorage properties at design time.

Input

Improvements

• Added Command and CommandParameter properties to support command binding and separation of UI logic through the Command pattern for the following controls:

  • C1NumericEdit

  • C1RangeSlider

  • C1DropDownControl

  • C1ComboBox

  • C1TextBox

  • C1MaskedTextBox

  • C1ToggleSwitch

Bug Fixes

• Fixed an issue where C1NumericEdit did not trigger validation from SpinUp and SpinDown when the editor did not have focus.

• Fixed an issue where internal text editors mishandled keyboard input when receiving system messages before rendering.

• Fixed an issue where C1MultiSelect displayed both the selected item and the last item in the header when using a space separator with DisplayMode=Text and SelectionMode=Extended.

PrintPreview

Bug Fixes

• Fixed an issue where generating a C1MultiDocument with multiple C1PrintDocument objects threw a System.Exception.

Ribbon

Bug Fixes

• Fixed an issue where the Ribbon flickered during resizing in a remote desktop environment.

Themes

Bug Fixes

• Fixed an issue where theme font merging ignored the Unit property when combining component and theme fonts.

TrueDBGrid

Bug Fixes

• Fixed an issue where the filter drop-down in C1TrueDBGrid displayed raw values instead of translated values when using C1TrueDBDropDown with ValueTranslate=True.

WinForms (General)

Bug Fixes

• Fixed an issue where DropDownForm assigned an incorrect owner when the parent IDropDownOwner was the DropDownHolder of PropertyGridInternal.

• Fixed an issue where the C1ToggleSwitch.Toggle method executed even when the control was disabled.