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Request a Feature Report a Bug
Unplanned
Last Updated: 03 Sep 2025 15:14 by Bert
RadNavigationView: Popup does not automatically close when mouse is not over item
Created by: Bert
Comments: 5
Category: NavigationView
Type: Bug Report
1
RadNavigationView: Popup does not automatically close when mouse is not over item
I have moved the mouse away, the pointer is not over an element of the NavigationView, but the SubPages remain visible. I would like it to be collapsed, and expand again when I move the mouse over the Page (the orange area).
Unplanned
Last Updated: 02 Sep 2025 14:22 by ADMIN
RadTreeView: The control hangs during drag-drop in Self-Referencing mode
Created by: Brandon
Comments: 1
Category: TreeView
Type: Bug Report
2
RadTreeView: The control hangs during drag-drop in Self-Referencing mode

In this particular case, the control is in Self-Referencing binding mode. When we perform drag-and-drop operations multiple times, the application enters an invalid state and hangs. Additionally, during drag-and-drop operations, moving several nodes can lead to collapsing and hiding the parent or other nodes randomly.

Unplanned
Last Updated: 01 Sep 2025 13:55 by ADMIN
RadGridView: The Control can't Lose Focus When the CommandColumn Cell is Selected
Created by: Riziq
Comments: 2
Category: GridView
Type: Bug Report
0
RadGridView: The Control can't Lose Focus When the CommandColumn Cell is Selected
When a CommandColumn cell is focused and we try to focus an external control, the RadGridView can't lose focus. The internal code will force the control to focus the CommandColumn cell again.
Completed
Last Updated: 01 Sep 2025 10:27 by ADMIN
Release 2025.3.812 (2025 Q3)
AI Coding Assistant
Created by: Nadya
Comments: 2
Category: UI for WinForms
Type: Feature Request
2
AI Coding Assistant

Provide an AI assistant for code generation with the Telerik UI for WinForms controls. 

Such as Telerik Blazor AI Coding Assistant

Declined
Last Updated: 01 Sep 2025 10:12 by ADMIN
Issue in Pdf viewer when i use interactive form pdf document
Created by: Jay
Comments: 2
Category: UI for WinForms
Type: Bug Report
0
Issue in Pdf viewer when i use interactive form pdf document
System.NullReferenceException: Object reference not set to an instance of an object.
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfElementToFixedElementTranslator.CreateFormField(PdfContentManager contentManager, FormFieldNodeOld terminalFormField)
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfElementToFixedElementTranslator.CreateWidgetAnnotation(WidgetOld source, PdfFormatProvider provider)
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfElementToFixedElementTranslator.CreateAnnotation(AnnotationOld source, PdfFormatProvider provider)
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.CopyAnnotationsFromPageSource(PageOld source, AnnotationCollection annotations)
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Pdf.PdfFormatProvider.LoadPageAnnotations(RadFixedPage page)
   at Telerik.Windows.Pdf.Documents.Fixed.Model.RadFixedPage.LoadAnnotations()
   at Telerik.Windows.Pdf.Documents.Fixed.Model.Internal.RadFixedPageInternal.Arrange()
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfReader.PageContentLoader.Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfReader.IPageContentLoader.LoadPageContent(RadFixedPage page)
   at Telerik.Windows.Pdf.Documents.Fixed.FormatProviders.Old.Pdf.PdfReader.PagesCacheManager.BeginUsingPageContent(RadFixedPage page)
   at Telerik.WinControls.UI.RadFixedPageElement.Attach(RadFixedPage data, Object context)
   at Telerik.WinControls.UI.RadFixedPageElement..ctor(RadFixedPage page, RadPdfViewerElement owner)
   at Telerik.WinControls.UI.RadPdfViewerElement.CreatePageElement(RadFixedPage data, Object context)
   at Telerik.WinControls.UI.FixedPageElementProvider.CreateElement(RadFixedPage data, Object context)
   at Telerik.WinControls.UI.BaseVirtualizedElementProvider`1.GetElement(T data, Object context)
   at Telerik.WinControls.UI.BaseVirtualizedContainer`1.UpdateElement(Int32 position, T data)
   at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureElements()
   at Telerik.WinControls.PdfViewer.PdfViewerStackContainer.MeasureElements()
   at Telerik.WinControls.UI.BaseVirtualizedContainer`1.MeasureOverride(SizeF availableSize)
   at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
   at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
   at Telerik.WinControls.UI.ScrollViewElement`1.MeasureViewElement(SizeF availableSize)
   at Telerik.WinControls.UI.ScrollViewElement`1.MeasureView(SizeF availableSize)
   at Telerik.WinControls.UI.ScrollViewElement`1.MeasureOverride(SizeF availableSize)
   at Telerik.WinControls.UI.VirtualizedScrollPanel`2.MeasureOverride(SizeF availableSize)
   at Telerik.WinControls.UI.RadPdfViewerElement.MeasureOverride(SizeF availableSize)
   at Telerik.WinControls.RadElement.MeasureCore(SizeF availableSize)
   at Telerik.WinControls.RadElement.Measure(SizeF availableSize)
   at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayout()
   at Telerik.WinControls.Layouts.ContextLayoutManager.UpdateLayoutCallback(ILayoutManager manager)
Unplanned
Last Updated: 25 Aug 2025 11:20 by ADMIN
RadGridView: NullReferenceException when call BestFitColumns method and rebind the grid with custom theme
Created by: enric
Comments: 2
Category: GridView
Type: Bug Report
1
RadGridView: NullReferenceException when call BestFitColumns method and rebind the grid with custom theme

Steps to reproduce:

1. Bind the grid to BindingList

2. Call BestFitColumns method in form's constructor

3. Use Fluent/Crystal theme

4. Rebind the grid by setting DataSource=null

5. Exception is thrown

Stack trace:

en Telerik.WinControls.UI.BestFitHelper.SetColumnWidth(GridViewColumn column, Single desiredWidth)
   en Telerik.WinControls.UI.BestFitHelper.BestFitColumnCore(GridViewColumn column, BestFitColumnMode mode)
   en Telerik.WinControls.UI.BestFitHelper.ProcessRequests()
   en Telerik.WinControls.UI.GridTableElement.UpdateAll()
   en Telerik.WinControls.UI.GridTableElement.UpdateViewCore(Object sender, DataViewChangedEventArgs args)
   en Telerik.WinControls.UI.GridTableElement.UpdateView(Object sender, DataViewChangedEventArgs args)
   en Telerik.WinControls.UI.GridTableElement.ProcessTemplateEvent(GridViewEvent eventData)
   en Telerik.WinControls.UI.GridTableElement.Telerik.WinControls.UI.IGridViewEventListener.ProcessEvent(GridViewEvent eventData)
   en Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessCollection(GridViewEvent gridEvent, PriorityWeakReferenceList list, GridEventProcessMode processMode)
   en Telerik.WinControls.UI.GridViewEventProcessEntity.ProcessEvent(GridViewEvent gridEvent)
   en Telerik.WinControls.UI.GridViewSynchronizationService.NotifyListeners(GridViewEvent gridEvent)
   en Telerik.WinControls.UI.GridViewSynchronizationService.FlushEvents()
   en Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewEvent gridEvent)
   en Telerik.WinControls.UI.GridViewSynchronizationService.DispatchEvent(GridViewTemplate template, GridViewEvent eventData, Boolean postUI)
   en Telerik.WinControls.UI.GridViewTemplate.DispatchEvent(GridViewEvent gridEvent, Boolean postUI)
   en Telerik.WinControls.UI.GridViewTemplate.DispatchDataViewChangedEvent(Object sender, DataViewChangedEventArgs args)
   en Telerik.WinControls.UI.GridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
   en Telerik.WinControls.UI.MasterGridViewTemplate.OnViewChanged(Object sender, DataViewChangedEventArgs e)
   en Telerik.WinControls.UI.GridViewTemplate.CollectionView_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   en Telerik.WinControls.Data.RadCollectionView`1.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
   en Telerik.WinControls.Data.RadDataView`1.RebuildData(Boolean notify)
   en Telerik.WinControls.Data.RadDataView`1.RefreshOverride()
   en Telerik.WinControls.Data.RadDataView`1.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
   en Telerik.WinControls.Data.RadCollectionView`1.source_CollectionChanged(Object sender, NotifyCollectionChangedEventArgs e)
   en Telerik.WinControls.Data.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
   en Telerik.WinControls.Data.RadListSource`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
   en Telerik.WinControls.Data.RadListSource`1.EndUpdate(Boolean notifyUpdates)
   en Telerik.WinControls.Data.RadListSource`1.Initialize()
   en Telerik.WinControls.Data.RadListSource`1.Bind(Object dataSource, String dataMember)
   en Telerik.WinControls.Data.RadListSource`1.set_DataSource(Object value)
   en Telerik.WinControls.UI.GridViewTemplate.set_DataSource(Object value)
   en Telerik.WinControls.UI.RadGridView.set_DataSource(Object value)

Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadSpreadsheet: Add public API for specifying default file names for the Open/Save functionality in RadSpreadsheetRibbonBar
Created by: Andy F.
Comments: 3
Category: Spreadsheet
Type: Feature Request
3
RadSpreadsheet: Add public API for specifying default file names for the Open/Save functionality in RadSpreadsheetRibbonBar
Users want to save the workbook via the Save ribbon button, but they want a default filename in the save dialog (not "book1.xlsx"). 
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadDock: Expose DocumenWindow.SvgImage property
Created by: Luca
Comments: 1
Category: UI for WinForms
Type: Feature Request
0
RadDock: Expose DocumenWindow.SvgImage property
At this moment, DocumenWindow has only Image property.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadMap: Add new provider working with Azure Maps
Created by: Francois
Comments: 5
Category: Map
Type: Feature Request
5
RadMap: Add new provider working with Azure Maps
 
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadGridView: Implement UI Automation
Created by: Nadya
Comments: 0
Category: GridView
Type: Feature Request
3
RadGridView: Implement UI Automation
 Add support for UI Automation in RadGridView control.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
Provide an option to set UI Automation globally
Created by: Nadya
Comments: 0
Category: UI for WinForms
Type: Feature Request
2
Provide an option to set UI Automation globally
 Currently, the EnableUIAutomation property can be set per control. It would be useful if there is an opportunity to enable/disable it globally. 
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadDiagram: Hidden/Collapsed diagram items can still be selected by clicking on them
Created by: Andrzej
Comments: 1
Category: Diagram, DiagramRibbonBar, DiagramToolBox
Type: Bug Report
0
RadDiagram: Hidden/Collapsed diagram items can still be selected by clicking on them
In this particular case, the shape/connection is hidden at runtime. When we click on the exact same spot where the items were drawn, the selection logic will detect them and select them. Hidden/Collapsed diagram items should not be selectable.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadSpreadsheet: Scatter series vertical axis Minimum and Maximum properties are not set correctly
Created by: Brian
Comments: 1
Category: Spreadsheet
Type: Bug Report
0
RadSpreadsheet: Scatter series vertical axis Minimum and Maximum properties are not set correctly
Scatter series vertical axis Minimum and Maximum properties are not set correctly.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadRichTextEditor: NullReferenceException when loading document that contains DateProperties with no FullDateDescriptor
Created by: Manisai
Comments: 5
Category: RichTextEditor
Type: Bug Report
1
RadRichTextEditor: NullReferenceException when loading document that contains DateProperties with no FullDateDescriptor
 
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadPopupContainer: Setting the Anchor or Dock property will break the appearance of the container
Created by: Matthew
Comments: 1
Category: PopupEditor
Type: Bug Report
0
RadPopupContainer: Setting the Anchor or Dock property will break the appearance of the container

The Anchor and Dock property is not relevant to the RadPopupContainer and should not be taken into account while calculating the size of the popup drop-down.

Workaround:

Avoid setting the Anchor and Dock properties of the RadPopupContainer.

Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
Changing the ApplicationThemeName does not change the text color
Created by: Matthias
Comments: 1
Category: RichTextEditor
Type: Bug Report
1
Changing the ApplicationThemeName does not change the text color

When changing the theme through ThemeResolutionService.ApplicationThemeName all the application gets changed. Except the ForeColor of the RadRichTextEditor does not get change. Hence the box displays black text on a dark background. Quite unreadable.

Assigning the theme directly in the designer makes everything renders ok.

Sample application attached.

Regrads,
Matthias

 

Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadCarousel: Designer crashes when setting RadButtonElement.DisplayStyle to Image with ControlDefault theme
Created by: Paul
Comments: 0
Category: Carousel
Type: Bug Report
0
RadCarousel: Designer crashes when setting RadButtonElement.DisplayStyle to Image with ControlDefault theme
Please run the attached sample project and follow the illustrated steps in the gif file.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
TabbedForm: Additional space when usinge Windows 11 Compact Dark theme
Created by: Pascal
Comments: 2
Category: UI for WinForms
Type: Bug Report
0
TabbedForm: Additional space when usinge Windows 11 Compact Dark theme

Using specifically Win11 Compact DARK theme has additional space compared to the Win11 Compact LIGHT theme. See the pictures.

  • On Light theme there are 4 pixels between the form border and the top border of a tab.
  • On Dark theme there are 12 pixels between the form border and the top border of a tab.

In my opinion the dark theme has a wrong height here and the light theme is correct, especially compared to other themes, even Office 2019 for example.

Light theme:

Dark theme:

Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadImageEditor: Memory consumption increases when adding and removing the control
Created by: Bob
Comments: 1
Category: ImageEditor
Type: Bug Report
0
RadImageEditor: Memory consumption increases when adding and removing the control
Memory consumption increases when adding and removing the control.
Completed
Last Updated: 25 Aug 2025 07:59 by ADMIN
Release 2025.3.812 (2025 Q3)
RadGridView: Clicking the filter icon will re-open the filter popup
Created by: Pierre
Comments: 1
Category: GridView
Type: Bug Report
0
RadGridView: Clicking the filter icon will re-open the filter popup
Clicking the filter icon will reopen the filter popup. In the following scenario, the filter pop-up is open. If we click the filter icon while the filter popup is open, it will close it and reopen it. This leaves the end user with flashing behavior. The filter icon should close the filter popup if it is open.
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