Last Updated: 21 Feb 2019 15:20 by ADMIN
Last Updated: 21 Feb 2019 11:20 by ADMIN

When you change series datapoints and then play ChartRevealAnimation the following InvalidOperationException might occur:

 Cannot call the ClockController.SkipToFill method for a Clock that has a Duration or RepeatDuration of Forever, because this Clock will never reach its fill period.
You can try calling PlayAnimation in Dispatcher:

  Dispatcher.BeginInvoke(new Action(() =>

Last Updated: 20 Feb 2019 07:06 by ADMIN
When a document is imported (for example from XAML) and then exported to DOCX or RTF, the fields lose their formatting. The issue is not observed if the document is just created.
Workaround: Change the fields display mode of all fields in headers/footers just before the export:
private void UpdateHeadersFooters(RadDocument document)
    foreach (Section section in document.Sections)
        if (section.Headers.Default.Body != null)
        if (section.Headers.First.Body != null)
        if (section.Headers.Even.Body != null)
        if (section.Footers.Default.Body != null)
        if (section.Footers.First.Body != null)
        if (section.Footers.Even.Body != null)
private void UpdateFields(RadDocument radDocument)
    RadDocumentEditor editor = new RadDocumentEditor(radDocument);
Last Updated: 19 Feb 2019 13:40 by ADMIN
When using the Fluent theme and the NoXaml binaries the above mentioned design time exception is thrown.
Last Updated: 19 Feb 2019 13:38 by ADMIN
When a PDF document contains images compressed with CCITTFaxDecode with applied BlackIs1 parameter, black color is visualized as white and white as black.
Last Updated: 19 Feb 2019 10:42 by ADMIN
TextSearch navigation in the Main Pane does not work. If you press letter "a" the first folder with Name starting with "a" should be selected.
This needs to work in alll layouts including Details which uses RadGridView.
Last Updated: 18 Feb 2019 17:12 by ADMIN
Last Updated: 18 Feb 2019 15:43 by ADMIN
Created by: ye4241
Comments: 1
Category: ComboBox
Type: Feature Request

The RadListBox has an attached property for mvvm binding of SelectedItems -


Please support SelectedItemsSource for RadComboxBox too.

In Development
Last Updated: 18 Feb 2019 11:21 by ADMIN
Created by: Janice
Comments: 4
Category: UI for WPF
Type: Feature Request
Enable clients to set custom HelpText for the controls from the suite.
Last Updated: 18 Feb 2019 11:12 by ADMIN
This behavior is reproducible when the SelectionUnit property of the RadGridView is set to "FullRow".
SelectedCells collection is not of the selected row updated when new columns are added runtime. For example, you have selected the first row which has 3 cells. Then you add 2 new columns. Now the row has 5 cells but the selected cells collection still have 3.

A possible workaround which can be used is to reset the SelectedItem property of the RadGridView.

var selectedItem = testGrid.SelectedItem;
testGrid.SelectedItem = null;
this.testGrid.Columns.Add(new GridViewDataColumn() { Header = "Value3", DataMemberBinding = new Binding("Value3"), Width = 100 });
this.testGrid.Columns.Add(CreateColumn("Value4", "Value4"));
testGrid.SelectedItem = selectedItem;
Last Updated: 18 Feb 2019 09:28 by ADMIN
Created by: Marco
Comments: 1
Category: Docking
Type: Feature Request

Having Problems with unreadable Tabs in RadPaneGroup: TabsSqueeze.png

I think I found a Solution with OverflowMode and ScrollViewer:

<telerik:RadPaneGroup x:Name="DocumentGroup" ScrollViewer.HorizontalScrollBarVisibility="Auto" OverflowMode="Scroll">


After Loading Layout the OverflowMode is not respected anymore.

I found this ticket in Silverlight, what discribes the Problem and is approved: Docking: I would like OverflowMode to work for all RadPaneGroup in xaml/codebehind and this be persisted through SaveLayout/LoadLayout

And i found this documentation, which say, using OverflowMode can lead to unexpected behaviors:

so i report this as a feature instead of a bug.

Please sea atteched an example project:
Usage: Save and than Load the Layout -> Scrolling of tabs break

Last Updated: 16 Feb 2019 10:24 by ADMIN
If you set the SelectionMode of the control to Multiple the SelectionChanged event fires only when you select item for the first item. Each next selection won't fire the event.

To work this around use to CollectionChanged event of the SelectedItems collection of RadMultiColumnComboBox.
Last Updated: 15 Feb 2019 16:12 by ADMIN
For some fonts the issue is present. Some of them are:



Last Updated: 15 Feb 2019 14:25 by ADMIN
Created by: Alexander
Comments: 2
Category: MultiColumnComboBox
Type: Bug Report

Hello Telerik,

Exception is thrown after typing in the autocompletebox and selecting an item right after that. 

  Message=Exception has been thrown by the target of an invocation.
   at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor)
   at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj, Object[] parameters, Object[] arguments)
   at System.Delegate.DynamicInvokeImpl(Object[] args)
   at System.Windows.RoutedEventArgs.InvokeEventHandler(Delegate genericHandler, Object genericTarget)
   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 e)
   at Telerik.Windows.Controls.GridView.GridViewDataControl.RaiseSelectionChangedEvent(SelectionChangeEventArgs args)
   at Telerik.Windows.Controls.DataControl.RaiseSelectionChangedEvent(ItemSelectionChange selectionChange)
   at Telerik.Windows.Controls.DataControl.Telerik.Windows.Data.Selection.ISelectorInternal.RaiseSelectionChangedEvent(ItemSelectionChange selectionChange)
   at Telerik.Windows.Data.Selection.ItemSelectionHandler.EndAllowedSelection(ItemSelectionChange selectionChange)
   at Telerik.Windows.Data.Selection.ItemSelectionHandler.EndPendingSelection(ItemSelectionChange pendingSelection)
   at Telerik.Windows.Data.Selection.ItemSelectionHandler.EndSelection()
   at Telerik.Windows.Data.Selection.ItemSelectionHandler.SelectedItems_CollectionChanged(Object sender, 

Thanks in advance.


Last Updated: 15 Feb 2019 12:49 by Hans
Created by: Hans
Comments: 2
Category: MultiColumnComboBox
Type: Feature Request
Expose a property to enable styling of the drop down element of MultiColumnComboBox. It the default scenario this is RadGridView.

Currently, an implicit style targeting RadGridView can be used instead.
Last Updated: 15 Feb 2019 12:05 by ADMIN
Currently, caret continues to blink even when typing or navigation is in progress (e.g. arrow key is pressed and held), which is inconvenient for the end users. Instead, the caret should stop blinking during these operations, similarly to industry standard apps like MS Word and OpenOffice.
Last Updated: 15 Feb 2019 10:32 by Srikanth
Provide built-in support for returning to the previous open folder using Backspace keyboard button.
Last Updated: 15 Feb 2019 09:08 by ADMIN

The event should fire when the DropDownContentManager gets initialized.

To work this around use the InitializeSelectionBridge event. The DropDownContentManager is initialized when this event fires.

Last Updated: 15 Feb 2019 08:56 by ADMIN
Resizing images always position the image at the cell where the image has been inserted. Flipping image also results in a wrong behavior.
Last Updated: 14 Feb 2019 16:16 by ADMIN
  • Create new WPFApplication.
  • Add a RadPdfViewer to the main window
<Window x:Class="YourProject.MainWindow"
        Title="MainWindow" Height="450" Width="800">
        <telerik:RadPdfViewer x:Name="pdfViewer"/> 
  • Open the pdf file
    public partial class MainWindow: Window
        public MainWindow()

        protected override void OnInitialized(EventArgs e)
            using(Stream stream = new FileStream(@"radExport.pdf",FileMode.Open,FileAccess.Read)){
                pdfViewer.Document = new PdfFormatProvider(stream).Import();