Unplanned
Last Updated: 20 Mar 2026 14:20 by Martin Ivanov
Make the UpdateViewPort of the SelectionUILayer class virtual so it can be overridden, thus allowing customization of the selection rectangle drawn in the UI.
Unplanned
Last Updated: 20 Mar 2026 10:21 by ADMIN
Binding erros appears when clicking on the Operator/Constants option in the left tree:

System.Windows.Data Error: 40 : BindingExpression path error: 'Children' property not found on 'object' ''ConstantEditorItemModel' (HashCode=24850331)'. BindingExpression:Path=Children; DataItem='ConstantEditorItemModel' (HashCode=24850331); target element is 'RadTreeViewItem' (Name=''); target property is 'ItemsSource' (type 'IEnumerable')

System.Windows.Data Error: 40 : BindingExpression path error: 'Children' property not found on 'object' ''OperatorEditorItemModel' (HashCode=64577580)'. BindingExpression:Path=Children; DataItem='OperatorEditorItemModel' (HashCode=64577580); target element is 'RadTreeViewItem' (Name=''); target property is 'ItemsSource' (type 'IEnumerable')
Won't Fix
Last Updated: 19 Mar 2026 17:14 by Valentin

ArgumentException occurs when using the voice typing feature of Windows (started with the Windows Key + H key combo) to convert speech to text in RadRichTextBox.

Exception stacktrace:

System.ArgumentException: 'Requested distance is outside the content of the associated document.'PresentationFramework.dll!System.Windows.Documents.TextPointer.TextPointer(System.Windows.Documents.TextContainer textContainer, int offset, System.Windows.Documents.LogicalDirection direction)
  PresentationFramework.dll!System.Windows.Documents.TextContainer.CreatePointerAtOffset(int offset, System.Windows.Documents.LogicalDirection direction) 
  PresentationFramework.dll!System.Windows.Documents.TextParentUndoUnit.Do() 
  PresentationFramework.dll!MS.Internal.Documents.UndoManager.Redo(int count) 
  PresentationFramework.dll!System.Windows.Documents.TextStore.RedoQuietly(int count)  PresentationFramework.dll!System.Windows.Documents.TextStore.SetFinalDocumentState(MS.Internal.Documents.UndoManager undoManager, System.Collections.Stack imeChangeStack, int appChangeCount, int imeSelectionAnchorOffset, int imeSelectionMovingOffset, int appSelectionAnchorOffset, int appSelectionMovingOffset)  PresentationFramework.dll!System.Windows.Documents.TextStore.HandleCompositionEvents(int previousUndoCount)  PresentationFramework.dll!System.Windows.Documents.TextStore.GrantLockWorker(MS.Win32.UnsafeNativeMethods.LockFlags flags)   PresentationFramework.dll!System.Windows.Documents.TextStore.RequestLock(MS.Win32.UnsafeNativeMethods.LockFlags flags, out int hrSession)

Unplanned
Last Updated: 17 Mar 2026 13:18 by Stenly
The Polygon elements that represent the background and border of a content control can have their size changed when adding a new line or a paragraph. 
Unplanned
Last Updated: 17 Mar 2026 09:27 by Stenly
Created by: Stenly
Comments: 0
Category: GanttView
Type: Feature Request
0
Introduce an out-of-the-box zooming and panning functionality in the TimeRuler part.
Unplanned
Last Updated: 11 Mar 2026 11:38 by Stenly
The key tips of RadRibbonView remain visible when pressing Alt+Tab to change to another app and the KeyTipService.ActivationMode is set to PreviewKeyDown.
Unplanned
Last Updated: 10 Mar 2026 13:35 by Stenly
When navigating the drop-down items of the RadCalendar control and a narrator is used, sometimes a wrong value is returned when navigating them via the arrow keys.
In Development
Last Updated: 10 Mar 2026 08:46 by ADMIN
When the RadWatermarkTextBox control has a label set through the Label property and the dark variation of the Fluent theme is set, hovering over the control will change its visual state and background to white, however, the label will still remain white (default foreground for the dark variation), thus appearing as if it has disappeared.
Duplicated
Last Updated: 06 Mar 2026 14:17 by ADMIN

Hi Team,

   I have backported the Xlsx file to Xls format. When I am trying to import the backported file using the Radspreadsheet UI control, I find that it has lost the color formatting which was existing in the original Xlsx file. Where as when we open the back ported file with Excel application we find that all the data and formatting is maintained.

So the request is that after backporting  and while importing the file, it should not loose the minimal xls supported features which Excel is able to support.





Attached is the InitialFile.xlsx and BackPorted.xls file

Note that Xlsx file if imported it maintains the data and formatting information of the workbbok when loaded via UI control.
Let us know in case of any more details or queries.

Exepct this to work

Regards,

Manish.

Unplanned
Last Updated: 06 Mar 2026 13:57 by Manish

We have a document in XLS format produced by GemBox. The yellow cells get black once the document is imported and then exported (back to XLS or XLSX) with RadSpreadProcessing.

In Development
Last Updated: 05 Mar 2026 12:34 by ADMIN
The import performance is reduced and the memory consumption is increased when XObject instances have many Shading elements.
Completed
Last Updated: 04 Mar 2026 13:48 by ADMIN
Release 2026.1.304 (2026 Q1)
When opening a document with a CFF Type1 font an exception is thrown: NullReferenceException: 'Object reference not set to an instance of an object.'
Unplanned
Last Updated: 02 Mar 2026 12:48 by Luc
Currently, RadRichTextBox supports the import and export of shapes from and to Office Open XML (DOCX). When exporting to PDF, the shapes are converted to images. When exporting to other formats the shapes are lost.
Won't Fix
Last Updated: 24 Feb 2026 05:34 by ADMIN
TreeListView with IsReadOnly True and EnableColumnVirtualization True.
Custom column is defined in code with IsReadOnly False.
Runtime, user edits a cell from the column and then scrolls horizontally - this leads to UI freeze, endlessly.
Unplanned
Last Updated: 19 Feb 2026 06:54 by Gert
Currently, the appointments in the same group in TimelineViewDefinition will be drawn on multiple lines if their date ranges overlap. Internally, the group height is split into "rows" for each overlapping that happens and then each appointment is rendered on the corresponding row.

Add a mechanism to control the number of rows and the row position of each appointments in the same group.
Unplanned
Last Updated: 16 Feb 2026 15:10 by ADMIN
ADMIN
Created by: Anna
Comments: 0
Category: Spreadsheet
Type: Feature Request
2
The SUMIFS function adds all of its arguments that meet multiple criteria.

A list of the supported functions is available at http://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/formulas/functions

This function can be implemented as a custom function. Check the following resources for more details on how to achieve that:

- http://docs.telerik.com/devtools/document-processing/libraries/radspreadprocessing/features/formulas/custom-functions
- https://github.com/telerik/xaml-sdk/tree/master/Spreadsheet/WPF/CustomFunctions
Unplanned
Last Updated: 12 Feb 2026 14:42 by Stenly
Currently, the GenerateExport method provides a PivotExportModel instance where the Cells collection is populated with the formatted value of the cells.

We could add an option to allow the copying of the raw data instead.
Unplanned
Last Updated: 11 Feb 2026 16:26 by ADMIN
Scheduled for 2026 Q2 (20.05.2026)

In the WPF Create New Project Wizard, the target framework versions dropdown is empty when no distribution is installed:

 

Unplanned
Last Updated: 11 Feb 2026 13:43 by Martin Ivanov
The VectorTileMapProvider works with a JSON file containing styles for the map tiles. Currently, the provider doesn't read the "sprite" and "glyph" fields of the JSON. Add support for these fields.
Declined
Last Updated: 11 Feb 2026 12:30 by ADMIN
No license found for Telerik UI for WPF when using Wix installer.
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