Recently Updated
Unplanned
Last Updated:
15 Jan 2026 13:21
by Markus
Created by:
Markus
Comments:
0
Category:
PDFViewer
Type:
Bug Report
The PDF document with images shows black canvas:
NOTE:
Works OK in version 2023.2.713Broken in version 2023.3.1005
Unplanned
Last Updated:
15 Jan 2026 12:44
by Dennis
Created by:
Dennis
Comments:
3
Category:
RichTextBox
Type:
Bug Report
RichTextBox: Bullet list with several levels is not viewed correctly in WordPad.
In Word, this works as expected. When the document is imported into RadRichTextBox, this works as well.
Unplanned
Last Updated:
15 Jan 2026 09:12
by Stenly
Created by:
Stenly
Comments:
0
Category:
Map
Type:
Bug Report
A NullReferenceException is thrown when a KML file is read, which contains an empty BalloonStyle tag.
Unplanned
Last Updated:
14 Jan 2026 19:47
by Valentin
Created by:
Martin Ivanov
Comments:
1
Category:
RichTextBox
Type:
Bug Report
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:
13 Jan 2026 11:14
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
FileDialogs
Type:
Feature Request
Add an option to disable the file system watcher used by the RadFileDialogs.
Unplanned
Last Updated:
13 Jan 2026 10:08
by Stenly
Created by:
Stenly
Comments:
0
Category:
PDFViewer
Type:
Feature Request
Introduce events similar to the PageRenderStarted and PageRenderCompleted ones that the Telerik UI for WinForms RadPdfViewer provides:
WinForms PdfViewer How-To Handle Rendering Events - Telerik UI for WinForms
Unplanned
Last Updated:
12 Jan 2026 15:14
by ADMIN
Created by:
Gerhard
Comments:
3
Category:
UI for WPF
Type:
Bug Report
No license found for Telerik UI for WPF when using Wix installer.
Unplanned
Last Updated:
09 Jan 2026 16:01
by Stenly
Created by:
Stenly
Comments:
0
Category:
Spreadsheet
Type:
Feature Request
Currently, when using the RadSpreadsheet with the RadSpreadsheetRibbon, the performance can be reduced when performing selection and edit operations in fast succession.
We could check if we could improve the performance in this scenario.
We could check if we could improve the performance in this scenario.
Unplanned
Last Updated:
09 Jan 2026 11:25
by ADMIN
ADMIN
Created by:
Tanya
Comments:
14
Category:
UI for WPF
Type:
Feature Request
Enable the customers to create and modify .pptx (PowerPoint) files . They need processing as well as showing such documents.
Unplanned
Last Updated:
08 Jan 2026 13:56
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
DateTimePicker
Type:
Feature Request
Currently, on lost focus of RadDateTimePicker, the input text is validated and if it is not in the proper date-time format the text is cleared. This forces the user to write the full date-time value again when a mistake is made. Add a mechanism to allow invalid date-time texts without automatically clearing the text input field.
Unplanned
Last Updated:
26 Dec 2025 12:14
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
Spreadsheet
Type:
Bug Report
The fill selection stops working, after a filtering is applied and the currently selected cell is filtered out (it gets hidden). This prevents from displaying the fill selection cross displayed when you hover the bottom right corner of a selected cell. Any further changes in the selection doesn't re-enable the selection fill feature.
To work this around, you can set the IsEnabled property of the FillSelection on selection changed.
private RadWorksheetEditor activeWorksheetEditor;
public MainWindow()
{
InitializeComponent();
this.spreadsheet.ActiveSheetEditorChanged += (s, e) =>
{
if (activeWorksheetEditor != null)
{
activeWorksheetEditor.Selection.SelectionChanged -= Selection_SelectionChanged;
}
activeWorksheetEditor = this.spreadsheet.ActiveWorksheetEditor;
activeWorksheetEditor.Selection.SelectionChanged += Selection_SelectionChanged;
};
}
private void Selection_SelectionChanged(object? sender, EventArgs e)
{
this.spreadsheet.ActiveWorksheetEditor.Selection.FillSelection.IsEnabled = true;
}
Unplanned
Last Updated:
25 Dec 2025 16:34
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
The caret position is wrong on down arrow key press when moving between two lines separated by a line break. This happens when you type longer text in the first line and then press the down arrow key to move to the next line, which is shorter. The caret should be placed at the end of the second line, but instead it is positioned few characters before the end of the line.
Unplanned
Last Updated:
25 Dec 2025 13:25
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
The line break symbol (Shift+Enter) is treated as a text character and it gets measured in the document position calculations executed when you click at the end of the document (somewhere after the line break symbol which ends the line).
This causes two visual issues. The first one is that the caret goes after the line break symbol, which means that when ShowFormattingSymbols is False an empty space (non-existing in the document) is added at the end of the line. Even if ShowFormattingSymbols=true and the line break symbol gets display, it is not expected for ,the caret to get positioned after the symbol.
The second issues is that, when you start typing after you click at the end of the line, the caret position is corrected, but this leads to a jumps of the caret with one character to the left, which brings an unpleasant visual glitch.
To work this around, you can create a custom MouseSelectionHandler and override its RegisterDocumentMouseDown method. This will allow you to check if the caret is placed after the line break symbol and manually update the caret position if that is the case.
public class CustomMouseSelectionHandler : MouseSelectionHandler
{
private IDocumentEditorPresenter presenter;
private RadDocument document;
public CustomMouseSelectionHandler(RadDocument document, IDocumentEditorPresenter presenter)
: base(document, presenter)
{
this.presenter = presenter;
this.document = document;
}
public override void RegisterDocumentMouseDown(bool ctrlPressed, bool shiftPressed, Point position, UIElement originalSource = null, SourceType source = SourceType.Mouse)
{
base.RegisterDocumentMouseDown(ctrlPressed, shiftPressed, position, originalSource, source);
var box = this.document.CaretPosition.GetCurrentSpanBox();
if (box != null && box.AssociatedSpan.Text == "¬")
{
document.CaretPosition.MoveToCurrentLineEnd();
}
}
} this.richTextBox.Loaded += (s, args) =>
{
var presenter = (DocumentPresenterBase)this.richTextBox.ActiveEditorPresenter;
presenter.MouseSelectionHandler = new CustomMouseSelectionHandler(this.richTextBox.Document, presenter);
};
Unplanned
Last Updated:
24 Dec 2025 08:36
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Improve the performance of the document import. Currently, large documents take a lot of time to get imported with the DocxFormatProvider, even if not assigned to the RadRichTextBox control.
Unplanned
Last Updated:
18 Dec 2025 15:15
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
Expander
Type:
Feature Request
Add a property or another mechanism to disable the fade expand/collapse animation of RadExpander in the Windows11 theme.
Unplanned
Last Updated:
18 Dec 2025 10:13
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
FormatException is thrown during the import of a table coming from a docx document when the application culture is "sv-SE". This happens when the column width in the document is a floating point number (ex: 120.65). The Swedish culture uses "," as decimal separator and " " as the number group separator, which makes any invariant decimal value (like 120.65) invalid during standard parsing (ex: float.Parse("120.65")).
Stacktrace:
FormatException: The input string '4514.5' was not in the correct format. at System.Single.Parse(String s) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.TableImporter.ImportTableGrid(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style style) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.TableImporter.Import(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style parentStyle) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildTable(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style parentStyle) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildBody() Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildDocument() Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.Import()Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase importer) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentAndRelationsFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase importer) Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.Import() Telerik.Windows.Controls.RichTextBox.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider.Import(System.IO.Stream input)
To work this around, switch to InvariantCulture during the import and return the original culture after that.
var cultureCache = Thread.CurrentThread.CurrentCulture;
Thread.CurrentThread.CurrentCulture = System.Globalization.CultureInfo.InvariantCulture;
Thread.CurrentThread.CurrentUICulture = System.Globalization.CultureInfo.InvariantCulture;
var provider= new DocxFormatProvider();
rtb.Document = provider.Import(stream);
Thread.CurrentThread.CurrentCulture = cultureCache;
Thread.CurrentThread.CurrentUICulture = cultureCache;
Unplanned
Last Updated:
15 Dec 2025 13:56
by Stenly
Created by:
Stenly
Comments:
0
Category:
Buttons
Type:
Feature Request
Currently, with the Windows 11 theme, the animation is applied via DoubleAnimationUsingKeyFrames, which sets the Width and Height properties of the element that represents the thumb of the RadToggleSwitchButton to 14px, which does not take into account the ThumbWidth/ThumbHeight properties.
We can improve the animation applied to the thumb for the mouse-over state to take into account the values of the ThumbWidth/ThumbHeight and properties.
We can improve the animation applied to the thumb for the mouse-over state to take into account the values of the ThumbWidth/ThumbHeight and properties.
Unplanned
Last Updated:
15 Dec 2025 11:28
by Stenly
Created by:
Stenly
Comments:
0
Category:
ComboBox
Type:
Bug Report
Typing Korean characters in the edit box causes characters to be missing when the autocomplete is shown.
For example, typing the combination to display the "단" character, pressing the "ㅊ" character, will display the autocomplete for items that contain it; however, pressing another key to create a combination representing the "체" causes the "ㅊ" to be omitted, and only the "ㅔ" is displayed.
For example, typing the combination to display the "단" character, pressing the "ㅊ" character, will display the autocomplete for items that contain it; however, pressing another key to create a combination representing the "체" causes the "ㅊ" to be omitted, and only the "ㅔ" is displayed.
Unplanned
Last Updated:
09 Dec 2025 10:29
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
Double clicking a word starting with a non-letter symbol selects the symbol as well, instead only selecting the word.
"(hello)"
In the example above, if you double click on the word "hello", this should select only the word. However, it selects also the opening bracket. The final selection becomes "(hello".
Note that the issue occurs also if you click in the end of the word "hello" and use Ctrl+Shift+LeftArrow to select it to the beginning.
"(hello)"
In the example above, if you double click on the word "hello", this should select only the word. However, it selects also the opening bracket. The final selection becomes "(hello".
Note that the issue occurs also if you click in the end of the word "hello" and use Ctrl+Shift+LeftArrow to select it to the beginning.
Unplanned
Last Updated:
08 Dec 2025 09:58
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
Licensing
Type:
Bug Report
The licensing watermark overlay gets displayed over Visual Studio when a Telerik WPF control gets hosted in the designer of a WinForms project.