Unplanned
Last Updated:
10 Feb 2025 13:10
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
The issue reproduces when track changes is enabled and new text is entered. After waiting some time and pressing the Backspace on the keyboard in order to delete a character, nothing happens. You should press the Backspace a second time in order to make the deletion work. After that you can delete the content normally.
The waiting time before pressing the Backspace is usually until the next minute of the clock comes. For example, you can write something at 14:55 and wait until 14:56. Then, press Backspace.
If you check the Output pane of Visual Studio you will see the following assertion failure message printed:
---- DEBUG ASSERTION FAILED ---- at Telerik.Windows.Documents.Model.RadDocumentEditor.DeleteTrackChanges(Boolean deletePrevious) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\Model\RadDocumentEditor_Editing.cs:line 693 at Telerik.Windows.Documents.Model.RadDocumentEditor.Delete(Boolean deletePrevious) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\Model\RadDocumentEditor_Editing.cs:line 85 at Telerik.Windows.Controls.RadRichTextBox.Telerik.Windows.Documents.Model.IDocumentEditor.Delete(Boolean deletePrevious) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\UI\RadRichTextBox.cs:line 4890 at Telerik.Windows.Controls.RadRichTextBox.Delete(Boolean deletePrevious) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\UI\RadRichTextBox.cs:line 4866 at Telerik.Windows.Documents.RichTextBoxCommands.DeleteCommand.ExecuteOverride(Object parameter) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\DeleteCommand.cs:line 57 at Telerik.Windows.Documents.RichTextBoxCommands.RichTextBoxCommandBase.Execute(Object parameter, Boolean focusCaret) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\RichTextBoxCommandBase.cs:line 316 at Telerik.Windows.Documents.RichTextBoxCommands.RichTextBoxCommandBase.Execute(Object parameter) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\RichTextBoxCommandBase.cs:line 285 at Telerik.Windows.Documents.RichTextBoxCommands.RichTextBoxRoutedCommand.Execute(Object parameter, RadRichTextBox radRichTextBox) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\RoutedCommands\RichTextBoxRoutedCommand.cs:line 57 at Telerik.Windows.Documents.RichTextBoxCommands.RichTextBoxRoutedCommand.CommandBindingHelper.CommandBinding_Executed(Object sender, ExecutedRoutedEventArgs e) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\RoutedCommands\RichTextBoxRoutedCommand.cs:line 17 at System.Windows.Input.CommandBinding.OnExecuted(Object sender, ExecutedRoutedEventArgs e) at System.Windows.Input.CommandManager.FindCommandBinding(Object sender, RoutedEventArgs e, ICommand command, Boolean execute) at System.Windows.Input.CommandManager.OnExecuted(Object sender, ExecutedRoutedEventArgs e) at System.Windows.UIElement.OnExecutedThunk(Object sender, ExecutedRoutedEventArgs e) at System.Windows.Input.ExecutedRoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object target) at System.Windows.RoutedEventArgs.InvokeHandler(Delegate handler, Object target) at System.Windows.RoutedEventHandlerInfo.InvokeHandler(Object target, RoutedEventArgs routedEventArgs) at System.Windows.EventRoute.InvokeHandlersImpl(Object source, RoutedEventArgs args, Boolean reRaised) at System.Windows.UIElement.RaiseEventImpl(DependencyObject sender, RoutedEventArgs args) at System.Windows.UIElement.RaiseEvent(RoutedEventArgs args, Boolean trusted) at System.Windows.Input.RoutedCommand.ExecuteImpl(Object parameter, IInputElement target, Boolean userInitiated) at System.Windows.Input.RoutedCommand.Execute(Object parameter, IInputElement target) at System.Windows.Input.RoutedCommand.System.Windows.Input.ICommand.Execute(Object parameter) at Telerik.Windows.Documents.UI.Extensibility.DefaultInputHandler.HandleInput(RadRichTextBox richTextBox, PreviewEditorKeyEventArgs e) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\RichTextBoxCommands\RoutedCommands\DefaultInputHandler.cs:line 54 at Telerik.Windows.Controls.RadRichTextBox.HandlePresenterKeyDown(PreviewEditorKeyEventArgs e) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\UI\RadRichTextBox.cs:line 4612 at Telerik.Windows.Documents.UI.DocumentPresenterBase.HandleKeyDown(KeyEventArgs e) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\UI\DocumentPresenterBase.cs:line 859 at Telerik.Windows.Documents.UI.DocumentPresenterBase.OnPreviewKeyDown(KeyEventArgs e) in C:\PersonalFiles\Git\wpf\Controls\RichTextBox\Core\UI\DocumentPresenterBase.cs:line 805
Completed
Last Updated:
21 May 2025 07:52
by ADMIN
Release 2025.2.521 (2025 Q2)
Created by:
Daniel
Comments:
2
Category:
RichTextBox
Type:
Bug Report
RadRichTextBox: Exception when one parses styles that contain specific (German) characters.
Declined
Last Updated:
22 Apr 2025 05:25
by ADMIN
Created by:
Martin Ivanov
Comments:
1
Category:
RichTextBox
Type:
Bug Report
NullReferenceException is thrown when the document gets updated after TableRow objects were removed with the Remove method of the parent Rows collection of the Table.
The table.Rows.Remove method is not properly removing some of the rows.
Stacktrace:
Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.TableGridMeasurer.CalculateTableCellMinMaxWidths(Telerik.Windows.Documents.Model.TableCell cell, float availableWidth) Line 137 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.TableGridMeasurer.CalculateTableMinMaxWidths(Telerik.Windows.Documents.Model.Table table, float availableWidth) Line 165 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.TableGridMeasurer.MeasureAutoFit(Telerik.Windows.Documents.Model.Table table, float availableWidth) Line 229 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.Table.RecalculateColumnWidths(float measureWidth) Line 1151 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.Table.RecalculateTableGrid(float measureWidth) Line 1249 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.TableLayoutBox.MeasureOverride(Telerik.Windows.Documents.Model.SizeF availableSize) Line 265 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(Telerik.Windows.Documents.Model.SizeF availableSize) Line 933 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.Measure(Telerik.Windows.Documents.Model.SizeF availableSize) Line 836 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.SectionLayoutBox.MeasureOverrideInternal(Telerik.Windows.Documents.Model.SizeF availableSize) Line 721 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.SectionLayoutBox.MeasureOverride(Telerik.Windows.Documents.Model.SizeF availableSize) Line 468 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(Telerik.Windows.Documents.Model.SizeF availableSize) Line 933 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.Measure(Telerik.Windows.Documents.Model.SizeF availableSize) Line 836 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverrideInternal(Telerik.Windows.Documents.Model.SizeF availableSize) Line 223 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.DocumentLayoutBox.MeasureOverride(Telerik.Windows.Documents.Model.SizeF availableSize) Line 150 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.MeasureCore(Telerik.Windows.Documents.Model.SizeF availableSize) Line 933 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Layout.LayoutElement.Measure(Telerik.Windows.Documents.Model.SizeF availableSize) Line 836 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.Model.RadDocument.Measure(Telerik.Windows.Documents.Model.SizeF measureSize) Line 1515 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.UI.DocumentPrintLayoutPresenter.MeasureOverride(System.Windows.Size availableSize) Line 714 C#
To work this around, use the DeleteTableRow method of the RadDocumentEditor.
RadDocumentEditor documentEditor = new RadDocumentEditor(document); documentEditor.DeleteTableRow(row);
Unplanned
Last Updated:
10 Mar 2025 14:56
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
It seems that the first time a Center TextAlignment is applied to the selection, its length is cached. Because of this, when the selection content (text) changes the length is not updated, thus the text doesn't align properly. It aligns accord to the initial length of the context. The content doesn't update also if the alignment is reset.
To work this around, avoid the FlowNoWrap layout mode and use only Flow.
Unplanned
Last Updated:
04 Jun 2025 14:42
by Stenly
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Currently, the RadRichTextBox supports only the MS Pinyin. We could add support for QQ Pinyin.
Completed
Last Updated:
11 Nov 2025 08:11
by ADMIN
Release Telerik UI for WPF 2025.4.1111 (2025 Q4)
Created by:
Martin Ivanov
Comments:
2
Category:
RichTextBox
Type:
Bug Report
Exporting RadDocument to docx format (using the DocxFormatProvider) produces an invalid file. The file is read properly by document viewers like RadRichTextBox or MS Word, but if you open it with "Open XML SDK Productivity Tool for Microsoft Office" or another app that validates documents, the document is treated as invalid.
To work this around, you can import the invalid .docx document using the RadWordsProcessing library (and its RadFlowDocument) and then export it again with RadWordsProcessing.
To work this around, you can import the invalid .docx document using the RadWordsProcessing library (and its RadFlowDocument) and then export it again with RadWordsProcessing.
Completed
Last Updated:
11 Nov 2025 08:11
by ADMIN
Release Telerik UI for WPF 2025.4.1111 (2025 Q4)
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Bug Report
When importing an HTML string that contains an image, which has an align attribute, the image creation logic on import does not take this attribute's value and apply it.
Unplanned
Last Updated:
17 Sep 2025 14:55
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Add support for export and import of the TextWrapping setting of the FloatingImageBlock to HTML.
Unplanned
Last Updated:
31 Oct 2025 11:38
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Currently, if you have img element in the HTML content which points to a link with an SVG image, the SVG is not imported. Instead, the missing image placeholder is displayed. Add support for importing SVG images.
Completed
Last Updated:
11 Feb 2026 09:14
by ADMIN
Release 2026.1.211 (2026 Q1)
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Bug Report
Working with the RadContextMenu that comes from the RadRichTextBoxUI, when having analytics enabled, produces a NullReferenceException.
Manually set the Menu property on the PreviewMouseLeftButtonUp event of the RadMenuItem:
static MainWindow()
{
EventManager.RegisterClassHandler(typeof(RadMenuItem), PreviewMouseLeftButtonUpEvent, new MouseButtonEventHandler(OnRadMenuItemPreviewMouseLeftButtonUp), true);
}
private static void OnRadMenuItemPreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
RadMenuItem radMenuItem = (RadMenuItem)sender;
RadContextMenu radContextMenu = radMenuItem.ParentOfType<RadContextMenu>();
if (radContextMenu != null)
{
PropertyInfo menuPropertyInfo = radMenuItem.GetType().GetProperty("Menu", BindingFlags.Public | BindingFlags.Instance);
if (menuPropertyInfo != null)
{
MethodInfo setMethod = menuPropertyInfo.GetSetMethod(true);
if (setMethod != null)
{
Application.Current.Dispatcher.BeginInvoke(new Action(() =>
{
setMethod.Invoke(radMenuItem, new object[] { radContextMenu });
}), System.Windows.Threading.DispatcherPriority.Background);
}
}
}
}
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:
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.
Won't Fix
Last Updated:
24 Mar 2026 10:53
by ADMIN
Created by:
Martin Ivanov
Comments:
7
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:
19 Jan 2026 09:15
by Stenly
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Currently, the RadRichTextBox control does not support selecting multiple images as MS Word does when the Wrap Text option is not set to In Line with Text.
Unplanned
Last Updated:
17 Mar 2026 13:18
by Stenly
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Bug Report
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.
Completed
Last Updated:
20 May 2026 11:37
by ADMIN
Release 2026.2.520 (2026 Q2)
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
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:
03 Apr 2026 15:54
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Add protection mode that allows to make the document readonly, but allow forms editing. In MS Word this can be enabled via the "Restrict Editing" menu. The option is called "Filling in forms" and protects the document, but leaves the Sdt elements (the forms) editable.
Completed
Last Updated:
07 Oct 2026 13:35
by ADMIN
Release 2026.3.1007
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
The text content control (SDT form) cannot be edited when the Lock property of the associated SdtProperties is set to SdtLocked. The SdtLocked setting should prevent deletion of the form only, but the user should be able to still edit the text.
The issue reproduces only if the content control was locked before any text is entered (when the text placeholder is displayed).
The issue reproduces only if the content control was locked before any text is entered (when the text placeholder is displayed).
Unplanned
Last Updated:
01 May 2026 07:43
by Martin Ivanov
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Add keyboard navigation in the DropDownList and ComboBox SDT elements (content controls) of RadRichTextBox.
Alt(or another modifier)+Down for drop down opening and Up and Down arrows for navigation in the items.
Alt(or another modifier)+Down for drop down opening and Up and Down arrows for navigation in the items.
Completed
Last Updated:
20 May 2026 11:37
by ADMIN
Release 2026.2.520 (2026 Q2)
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
The PlaceholderText of a content control's Placeholder is no saved during XAML export.