2026 v2

Command

Bug Fixes

• Fixed an issue where C1ToolBar truncated button text when the display scaling exceeded 96 DPI.

• Fixed an issue where a NullReferenceException occurred in C1MainMenu when resetting the BackColor property after calling Dispose method.

• Fixed an issue where a NullReferenceException occurred in C1NavBar and C1OutBar when resetting the ForeColor property after calling Dispose method.

Editor

Improvements

• Added support for loading RTF and DOCX documents directly using the LoadDocumentAsync method without displaying the Open File dialog.

• Added support for pre-populating the Save File dialog with the default or existing file name and extension.

• Added support for displaying all supported file types by default in the Open File dialog.

• Added the DragDrop, DragEnter, DragOver, DragLeave, MouseDown, MouseUp, and DocumentChanged events.

• Added the Print tab and group, with options to print using the system or browser print dialog, print to the default system printer, or save the document as a PDF.

• Added the ShowPrintButtonsInQat property to display Print Preview and Quick Print buttons in the QAT.

• Added the ShowPrintUIAsync method to open the system or Edge-based browser print dialog.

• Added the InsertBeforeElementAsync, InsertAfterElementAsync, and InsertIntoElementAsync methods to insert HTML content before, after, or into a specified element.

• Added default text for design time.

• Added support for hiding the BackgroundImage and BackgroundImageLayout properties in the designer.

• Added support for importing DOCX and RTF documents using C1.Word.

• Added support for exporting DOCX and RTF documents using C1.Word.

Bug Fixes

• Fixed an issue where a NullReferenceException occurred when resetting the BackColor, ForeColor, or Font property after calling Dispose method.

• Fixed an issue where HTML documents larger than 2 MB could not be loaded from a stream.

• Fixed an issue where content could still be modified using EditorRibbon tools while the editor was in Preview mode.

ExpressionEditor

Bug Fixes

• Fixed a memory leak in C1ExpressionEditorPanel.

FlexChart

Improvements

• Added the RangeZone series to represent rectangular regions in data coordinates.

• Added support for editing diagram properties, data-binding properties, and chart elements such as the legend, header, and footer in the FlexDiagram Designer.

• Added support for funnel chart rotation in FlexChart.

• Updated the C1.Chart version to 10.0.20262.108.

FlexGrid

Improvements

• Added support for exporting grid data to Excel without footers.

• Added support for the Rows.Selected property with Default, Cell, CellRange, Row, RowRange, Column, ColumnRange, and MultiRange selection modes.

Bug Fixes

• Fixed an issue where an ArgumentOutOfRangeException occurred when deleting all selected rows with SelectionMode set to Default or RowRange.

• Fixed an issue where the entire row was copied when only one cell was selected.

• Fixed an issue where the application froze when using the Clear method.

• Fixed an issue where the Clear method performed slowly in grids containing a large number of rows.

FlexReport

Bug Fixes

• Fixed an issue where fields of type System.Byte[] and System.Object were missing from the FlexReport Designer.

GanttView

Bug Fixes

• Fixed an issue where text in the chart area was rendered at an incorrect size during printing or print preview when display scaling exceeded 100%.

Input

Bug Fixes

• Fixed an issue where the C1MaskedTextBox was not displayed after resetting the EditMask property.

Input.MultiSelect

Bug Fixes

• Fixed an issue where a NullReferenceException occurred when resetting the BackColor property after calling Dispose method.

InputPanel

Bug Fixes

• Fixed an issue where a NullReferenceException occurred when resetting the BackColor or ForeColor property after calling Dispose method.

Improvements

• Added UIA support for the following controls:

  • InputPanel

  • InputButton

  • InputCheckBox

  • InputRadioButton

  • InputTextBox

  • InputMaskedTextBox

  • InputNumericBox

  • InputComboBox

  • InputDatePicker

  • InputTimePicker

  • InputMenu

  • InputSplitButton

  • InputTrackBar

  • InputProgressBar

  • InputLabel

  • InputHtmlLabel

  • InputImage

  • InputGroupHeader

  • InputSeparator

  • InputLayoutPanelBase

  • InputFlowPanel

  • InputGridPanel

  • InputControlHost

  • InputDataNavigator

• Added Command and CommandParameter properties to InputComboBox, InputMenu, InputDatePicker, and InputSplitButton to trigger bound commands from OnDropDownClosed events.

• Added Command and CommandParameter properties to InputButton and InputHtmlLabel to trigger bound commands from OnClick and LinkClicked events.

• Added Command and CommandParameter properties to InputNumericBox, InputTimePicker, and InputTrackBar to trigger bound commands from OnValueChanged events.

• Added Command and CommandParameter properties to InputCheckBox and InputRadioButton to trigger bound commands from OnCheckedChanged events.

• Added Command and CommandParameter properties to InputTextBox and InputMaskedTextBox to trigger bound commands from OnTextChanged events.

Map

Bug Fixes

• Fixed an issue where text and layout elements were clipped when display scaling was set to 175%.

Ribbon

Bug Fixes

• Fixed an issue where C1RibbonForm calculated incorrect border size and position after changing the display scaling when using System awareness.

Schedule

Bug Fixes

• Fixed an issue where a NullReferenceException occurred when resetting the Font property after calling Dispose method.

SpellChecker

Bug Fixes

• Fixed an issue where a NullReferenceException occurred after calling Dispose method.

• Fixed an issue where a NullReferenceException occurred when resetting the BackColor property after calling Dispose.

TreeView

Bug Fixes

• Fixed an issue where a NullReferenceException occurred in C1CheckList when resetting the BackColor property after calling Dispose method.

ComponentOne WinForms (C1.Win)

Improvements

• Added the IScrollItemProvider interface for:

  • UiaButton

  • UiaCalendar

  • UiaCheckBox

  • UiaComboBox

  • UiaDataGrid

  • UiaEdit

  • UiaGroup

  • UiaHyperlink

  • UiaImage

  • UiaList

  • UiaPane

  • UiaProgressBar

  • UiaRadioButton

  • UiaSlider

  • UiaSpinner

  • UiaTable

  • UiaTableBase

  • UiaThumb

  • UiaToggleButton

  • UiaToolBar

  • UiaTree

Bug Fixes

• Fixed an issue where the DropDown form raised the OnOwnerDropDownClosed event when its owner was being disposed. (Jira: C1WIN-35281)

Other Changes

• Renamed constructor arguments for:

  • UiaButton

  • UiaCalendar

  • UiaCheckBox

  • UiaComboBox

  • UiaDataGrid

  • UiaDataItem

  • UiaGroup

  • UiaHeader

  • UiaHeaderItem

  • UiaHyperlink

  • UiaImage

  • UiaList

  • UiaListItem

  • UiaMenuItem

  • UiaPane

  • UiaProgressBar

  • UiaRadioButton

  • UiaScrollBar

  • UiaSlider

  • UiaSpinner

  • UiaTab

  • UiaTabItem

  • UiaTable

  • UiaTableBase

  • UiaThumb

  • UiaToggleButton

  • UiaToolBar

  • UiaTree

  • UiaTreeItem.