Recently Updated
Completed
Last Updated:
13 Aug 2026 09:40
by ADMIN
Release Telerik UI for WPF 2026.3.812 (Q3 2026)
ADMIN
Created by:
Petya
Comments:
0
Category:
RichTextBox
Type:
Bug Report
If the document contains a simple field without run inside, the import process fails.
<w:fldSimple w:instr="page" w:dirty="true"/>
The same document with a run inside the field does not cause an error
<w:fldSimple w:instr="page" w:dirty="true">
<w:r>
<w:t>1</w:t>
</w:r>
</w:fldSimple>
Completed
Last Updated:
13 Aug 2026 09:40
by ADMIN
Release Telerik UI for WPF 2026.3.812 (Q3 2026)
Created by:
Pawan
Comments:
4
Category:
RichTextBox
Type:
Bug Report
Keyboard commands are not working for controls inside the InlineUIContainer. The reason for this is that RichTextBox is handling them.
The commands are: Left, Right, Backspace, Delete, Tab, Ctrl+C, Ctrl+V among others.
Workaround:
Attach custom event handler to the PreviewEditorKeyDown event of the RichTextBox. This event should set "e.SuppressDefaultAction = true" when the focus is in the InineUIContainer.
The commands are: Left, Right, Backspace, Delete, Tab, Ctrl+C, Ctrl+V among others.
Workaround:
Attach custom event handler to the PreviewEditorKeyDown event of the RichTextBox. This event should set "e.SuppressDefaultAction = true" when the focus is in the InineUIContainer.
Completed
Last Updated:
13 Aug 2026 09:40
by ADMIN
Release Telerik UI for WPF 2026.3.812 (Q3 2026)
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
When a DropDownList SDT form is saved in a XAML document and then imported with the XamlFormatProvider, an extra ListItem entry is added in the items collection of the DropDownList. The extra entry is the default "Choose an item".
To work this around, iterate all ComboBoxProperties and manually remove duplicates of the "Choose an item" entry.
var dropDownLists = radRichTextBox.Document.EnumerateChildrenOfType<SdtRangeStart>()
.Where(x => x.SdtProperties is ComboBoxProperties)
.Select(x => x.SdtProperties).OfType<ComboBoxProperties>();
var defaultItemString = LocalizationManager.GetString("Documents_ContentControlsGenerator_ListItem");
foreach (var item in dropDownLists)
{
if (item.Items.Count > 0 && item.Items.Any(x => x.Value != defaultItemString) && item.Items.Any(x => x.Value == defaultItemString))
{
var occurrence = item.Items.FirstOrDefault(x => x.Value == defaultItemString);
while (occurrence != null)
{
item.Items.Remove(occurrence);
occurrence = item.Items.FirstOrDefault(x => x.Value == defaultItemString);
}
}
}
Completed
Last Updated:
20 Jul 2026 11:22
by ADMIN
Release Telerik UI for WPF 2026.3.812 (Q3 2026)
Created by:
Dimitar
Comments:
0
Category:
RichTextBox
Type:
Bug Report
Memory leak when changing the documents
Completed
Last Updated:
17 Jul 2026 09:41
by ADMIN
Release Telerik UI for WPF 2026.2.701
Created by:
Swapnil
Comments:
1
Category:
RichTextBox
Type:
Bug Report
After selecting a word, pressing the left arrow key places the cursor on the right side of the word rather than moving it to the left as expected.
Completed
Last Updated:
17 Jul 2026 09:41
by ADMIN
Release Telerik UI for WPF 2026.2.701
Created by:
Martin Ivanov
Comments:
0
Category:
RichTextBox
Type:
Bug Report
Inspecting a DocumentPosition instance in the Visual Studio debugger triggers recursive DebuggerDisplay expansion. The displayed tooltip repeats Position and Location values until Visual Studio reports that DebuggerDisplay evaluation reached max recursion count.
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.
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.
Completed
Last Updated:
11 Feb 2026 09:14
by ADMIN
Release 2026.1.211 (2026 Q1)
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;
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);
}
}
}
}
Completed
Last Updated:
21 Jan 2026 12:28
by ADMIN
Release Telerik UI for WPF 2025.4.1321
Created by:
Swapnil
Comments:
0
Category:
RichTextBox
Type:
Feature Request
Unify the keyboard selection in tables with the arrow keys to match MS Word.
Completed
Last Updated:
21 Jan 2026 12:28
by ADMIN
Release Telerik UI for WPF 2025.4.1321
Created by:
Iva
Comments:
4
Category:
RichTextBox
Type:
Feature Request
Currently, the only customization that can be performed is using HyperlinkToolTipFormatString property of RadRichTextBox, which sets the format for all hyperlinks in the document of the control. It would be nice if it were possible to be able to set different tooltips.
Completed
Last Updated:
21 Jan 2026 12:28
by ADMIN
Release Telerik UI for WPF 2025.4.1321
ADMIN
Created by:
Boby
Comments:
4
Category:
RichTextBox
Type:
Bug Report
Font weight, size and other current editing style properties are not preserved when document layout is performed, for example in the following cases: - the document is in web layout mode and the controls is resized - scroll bar changes its visibility. Steps to reproduce: - Set RadRichTextBox to Web layout mode. - Type a word, select it and make it bold. - Press enter and type a word - Repeat the previous step until RadRichTextBox height is reached and scrollbar appear. - Type a word. Expected: The last word is bold. Actual: The last word is not bold.
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.
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:
0
Category:
RichTextBox
Type:
Bug Report
The RichTextBox internal logic that imports .docx documents (DocxFormatProvider) doesn't support elements that don't need direct content, but have both start and end tags. Instead such elements should use self-closing tags.
For example, instead of <w:vertAlign w:val="baseline"></w:vertAlign> it should be <w:vertAlign w:val="baseline"/>
When such element is read during import, issues may occur. Two main known issues here are with the w:vertAlign and Relationship tags.
Using
<w:vertAlign w:val="baseline"></w:vertAlign> instead of
<w:vertAlign w:val="baseline"/> throws NullReferenceException with the following stack trace:
System.NullReferenceException: 'Object reference not set to an instance of an object.' Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.OpenXmlHelper.ConvertStringToBaselineAlignment(string value) Line 168 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.SpanStyleImporter.ReadBaselineAlignment(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style style) Line 243 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.SpanStyleImporter.ReadStyle(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style style) Line 88 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.StyleDefinitionsImporter.ReadSpanStyleProperties(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Parsing.Style style) Line 278 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.StyleDefinitionsImporter.ReadStyle() Line 188 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.StyleDefinitionsImporter.Import() Line 67 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase importer) Line 430 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentAndRelationsFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase importer) Line 406 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.Import() Line 190 C# Telerik.Windows.Documents.FormatProviders.OpenXml.dll!Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider.Import(System.IO.Stream input) Line 147 C# Telerik.Windows.Documents.dll!Telerik.Windows.Documents.FormatProviders.DocumentFormatProviderBase.Import(byte[] input) Line 90 C#
Using
<Relationship Id="rId00004" Target="styles.xml" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"></Relationship> instead of
<Relationship Id="rId00004" Target="styles.xml" Type="http://schemas.openxmlformats.org/officeDocument/2006/relationships/styles"/> throws KeyNotFoundException with the following stack trace:
KeyNotFoundException: The given key was not present in the dictionary.
System.ThrowHelper.ThrowKeyNotFoundException() in ThrowHelper.cs
System.Collections.Generic.Dictionary<TKey, TValue>.this[TKey].get(TKey) in Dictionary.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.PartRelationsImporter.GetRelationByID(string) in PartRelationsImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.GetRelationByID(string) in DocxImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildSection() in MainDocumentImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildBody() in MainDocumentImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.BuildDocument() in MainDocumentImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.MainDocumentImporter.Import() in MainDocumentImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase) in DocxImporter.cs
Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxImporter.ReadXmlContentAndRelationsFromPackage(Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.Import.DocxPartImporterBase) in DocxImporter.cs
To work this around, import the document with the WordsProcessing library. If you need to display it in RadRichTextBox, you can export it again using the WordsProcessing library. This will normalize the tags. Then import it again using the RadDocument's DocxFormatProvider.
var dplDocxFormatProvider = new Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider();
RadFlowDocument flowDocument = dplDocxFormatProvider.Import(File.ReadAllBytes("../../../test.docx"), null);
var docBytes = dplDocxFormatProvider.Export(flowDocument, null);
File.WriteAllBytes("../../../modified-doc.docx", docBytes);
var rtbDocxFormatProvider= new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();
RadDocument document = rtbDocxFormatProvider.Import(File.ReadAllBytes("../../../modified-doc.docx"));
Completed
Last Updated:
11 Nov 2025 08:11
by ADMIN
Release Telerik UI for WPF 2025.4.1111 (2025 Q4)
Created by:
Daniel
Comments:
4
Category:
RichTextBox
Type:
Bug Report
Document exported to DOCX with 2025 Q2 cannot be opened by 2025 Q1 or previous versions.
Workaround: Use document processing to fix the document.
var processing_provider = new Telerik.Windows.Documents.Flow.FormatProviders.Docx.DocxFormatProvider();
var document = processing_provider.Import(File.ReadAllBytes("C:\\Users\\test\\Downloads\\word1.docx"),null);
var bytes_ = processing_provider.Export(document, null);
var rtb_provider = new Telerik.Windows.Documents.FormatProviders.OpenXml.Docx.DocxFormatProvider();
var doc = rtb_provider.Import(bytes_);
radRichTextBox.Document = doc;
Completed
Last Updated:
11 Nov 2025 08:11
by ADMIN
Release Telerik UI for WPF 2025.4.1111 (2025 Q4)
Created by:
Mark
Comments:
0
Category:
RichTextBox
Type:
Bug Report
RichTextBox: Custom annotations are not rendered correctly when they have no content and are right-aligned (gif Attached).
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:
12 Aug 2025 10:30
by ADMIN
Release 2025.3.812 (2025 Q3)
Created by:
Stenly
Comments:
0
Category:
RichTextBox
Type:
Bug Report
Performing selection on spans, some of which are present in a list, does not allow for including all of them in the list. Instead, the current list will have to be removed and reapplied to all selected spans.
Completed
Last Updated:
21 May 2025 07:52
by ADMIN
Release 2025.2.521 (2025 Q2)
Created by:
Adam
Comments:
1
Category:
RichTextBox
Type:
Bug Report
The operating system region and language needs to be set to Japanese.
RichTextBox seems to have several issues with Japanese, but being locked from visibility or edit is the biggest one.
To recreate, start typing in Japanese, push the "right" arrow after selecting the IME option desired, then hit "spacebar." This seems to duplicate the text, then when trying to continue to type into the text field the text is no longer visible (yet the IME does display).
The native WPF RichTextBox has no issues (and also supports partial selection, etc.).
I've attached a video to show the behavior with 2025 Q1 telerik.
*note:* This is on a machine with NVIDIA graphics. I mention this as there may be some issues with RichTextBox and the hardware... When I'm in a virtual machine with a completely Japanese environment and virtual graphics driver, there is NO text visible at all when trying to type into the RichTextBox. Works fine with other controls and wpf RichTextBox.