Progress® Telerik® UI for WPF Feedback Portal

In Development

Last Updated: 03 Jul 2025 18:08 by ADMIN

Scheduled for 2025 Q3 (August)

Licensing: The missing or invalid license dialog and watermark are shown even when a valid license key is installed in an addin project

Created by: Martin Ivanov

Comments: 3

Category: UI for WPF

Type: Bug Report

Licensing: The missing or invalid license dialog and watermark are shown even when a valid license key is installed in an addin project

The dialog and the watermark stating that no license is found are displayed, even when the license key is installed properly. This happens in addin projects, like Excel VSTO Add-in.

To workaround this use the TelerikLicensing.Register method to install your license script key.

public MyWpfUserControl()
{
    TelerikLicensing.Register("your-script-key");
    InitializeComponent();
}

In Development

Last Updated: 03 Jul 2025 18:08 by ADMIN

Scheduled for 2025 Q3 (August)

PersistanceFramework: Missing types regarding GridViewColumns cause exceptions when saving

Created by: David

Comments: 0

Category: PersistenceFramework

Type: Bug Report

PersistanceFramework: Missing types regarding GridViewColumns cause exceptions when saving

Missing types regarding GridViewColumns cause exceptions when saving:

Workaround

Add the types manually:

radGridView.ItemsSource = sampleData;
manager.AllowGridViewControls();

manager.AllowedTypes.Add(typeof(GridViewToggleRowDetailsColumn));
manager.AllowedTypes.Add(typeof(GridViewDataColumn));
manager.AllowedTypes.Add(typeof(DependencyObject));
manager.AllowedTypes.Add(typeof(Size));
manager.AllowedTypes.Add(typeof(SizeConverter));

var gridViewColumnType = typeof(Telerik.Windows.Controls.GridViewColumn);
var assembly = gridViewColumnType.Assembly;

// Get the internal type by its full name
var internalType = assembly.GetType("Telerik.Windows.Controls.GridViewColumnCollectionInternal", throwOnError: false);

// Use the type as needed (for example, add to AllowedTypes if required)
if (internalType != null)
{
    manager.AllowedTypes.Add(internalType);
}

In Development

Last Updated: 03 Jul 2025 18:08 by ADMIN

Scheduled for 2025 Q3 (August)

RibbonView: RibbonWindow's maximize icon is updated between its states in the Office2019 theme

Created by: Stenly

Comments: 0

Category: RibbonView

Type: Bug Report

RibbonView: RibbonWindow's maximize icon is updated between its states in the Office2019 theme

Using the RadRibbonWindow with the Office2019 theme, the maximize icon is updated when the button is interacted with (it does not change between the maximized and normal states).

To work around this behavior, extract the default ControlTemplate of the RadRibbonWindow element and add an additional Setter with TargetName="maximizeButton" for its Content property, to the Trigger for the WindowState property when its value is set to Maximized. For the Value property of the added Setter, create a new RadGlyph element and set its Glyph property to GlyphWindowCollapse.

The following code snippet showcases this suggestion's implementation:

<Style TargetType="telerik:RadRibbonWindow" BasedOn="{StaticResource RadRibbonWindowStyle}">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="telerik:RadRibbonWindow">
                <Border x:Name="outerBorder" Background="{TemplateBinding WindowBackground}" CornerRadius="{TemplateBinding CornerRadius}">
                    <Grid x:Name="MaximizeWindowDecorator">
                        <Grid telerik:CornerRadiusHelper.ClipRadius="{Binding ElementName=outerBorder, Path=CornerRadius}" telerik:CornerRadiusHelper.ClipRadiusOffset="{TemplateBinding telerik:CornerRadiusHelper.ClipRadiusOffset}" Margin="{TemplateBinding BorderThickness}">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="28"/>
                                <RowDefinition Height="*"/>
                                <RowDefinition Height="Auto"/>
                            </Grid.RowDefinitions>
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="Auto"/>
                                <ColumnDefinition Width="*"/>
                                <ColumnDefinition Width="Auto"/>
                            </Grid.ColumnDefinitions>
                            <Border Grid.Row="0" Grid.Column="1" Background="{telerik:Office2019Resource ResourceKey=HeaderBackgroundBrush}"/>
                            <Grid Grid.ColumnSpan="3">
                                <Grid.ColumnDefinitions>
                                    <ColumnDefinition Width="Auto"/>
                                    <ColumnDefinition Width="*"/>
                                </Grid.ColumnDefinitions>
                                <StackPanel x:Name="IconPanel" Orientation="Horizontal" HorizontalAlignment="Left" Visibility="{TemplateBinding IconVisibility}" VerticalAlignment="Center" Margin="4 0 0 0">
                                    <Image
                                    Name="PART_Icon"
                                    shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                    Source="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=Icon, Converter={StaticResource IconConverter}}"
                                    Width="{Binding Path=SmallIconSize.Width, Source={x:Static shell:SystemParameters2.Current}}"
                                    Height="{Binding Path=SmallIconSize.Height, Source={x:Static shell:SystemParameters2.Current}}"/>
                                    <Rectangle Width="1" Margin="4 0" Fill="{telerik:Office2019Resource ResourceKey=MainBorderBrush}"/>
                                </StackPanel>
                                <telerikRibbonViewPrimitives:WindowTitle x:Name="WindowTitle"
                                Grid.Column="1"
                                Title="{TemplateBinding Title}"
                                Style="{TemplateBinding TitleBarStyle}"
                                VerticalAlignment="Center"
                                HorizontalAlignment="Center"
                                Margin="0 0 65 0"/>
                            </Grid>
                            <StackPanel x:Name="buttonPanel" Orientation="Horizontal" Grid.ColumnSpan="3" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0 0 2 0">
                                <telerik:RadButton x:Name="minimizeButton"
                                                   shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                   ToolTipService.ToolTip="Minimize"
                                                   Command="{x:Static shell:SystemCommands.MinimizeWindowCommand}"
                                                   Style="{StaticResource RibbonWindowButtonStyle}"
                                                   CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadButton.ToolTip>
                                        <TextBlock Text="{telerik:LocalizableResource Key=RibbonWindowMinimize}"/>
                                    </telerik:RadButton.ToolTip>
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphMinimize}"/>
                                </telerik:RadButton>
                                <telerik:RadToggleButton x:Name="maximizeButton"
                                                         shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                         IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=WindowState, Converter={StaticResource BooleanToWindowStateConverter}, Mode=TwoWay}"
                                                         Style="{StaticResource RadRibbonWindowToggleButtonStyle}"
                                                         CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphWindow}"/>
                                </telerik:RadToggleButton>
                                <telerik:RadButton x:Name="closeButton"
                                                   shell:WindowChrome.IsHitTestVisibleInChrome="True"
                                                   Command="{x:Static shell:SystemCommands.CloseWindowCommand}"
                                                   Style="{StaticResource RibbonWindowButtonStyle}"
                                                   CornerRadius="{Binding Path=CornerRadius.TopRight, RelativeSource={RelativeSource TemplatedParent}}">
                                    <telerik:RadButton.ToolTip>
                                        <TextBlock Text="{telerik:LocalizableResource Key=RibbonWindowClose}"/>
                                    </telerik:RadButton.ToolTip>
                                    <telerik:RadGlyph Glyph="{StaticResource GlyphClose}"/>
                                </telerik:RadButton>
                            </StackPanel>
                            <Border x:Name="PART_ClientAreaBorder" Grid.Column="1" Grid.Row="1" Margin="0 12 0 0" Background="{TemplateBinding Background}"/>
                            <AdornerDecorator x:Name="Adorner" Grid.Column="1" Grid.RowSpan="2">
                                <ContentPresenter Canvas.ZIndex="0" Name="PART_RootContentPresenter"/>
                            </AdornerDecorator>
                            <ResizeGrip x:Name="WindowResizeGrip"
                            Grid.Row="1"
                            Grid.Column="1"
                            shell:WindowChrome.ResizeGripDirection="BottomRight"
                            HorizontalAlignment="Right"
                            VerticalAlignment="Bottom"
                            Visibility="Collapsed"
                            IsTabStop="False"/>
                        </Grid>
                        <Border Background="{x:Null}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" CornerRadius="{TemplateBinding CornerRadius}"/>
                    </Grid>
                </Border>
                <ControlTemplate.Triggers>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="Window.ResizeMode" Value="CanResizeWithGrip"/>
                            <Condition Property="Window.WindowState" Value="Normal"/>
                        </MultiTrigger.Conditions>
                        <Setter TargetName="WindowResizeGrip" Property="Visibility" Value="Visible"/>
                    </MultiTrigger>
                    <Trigger Property="Window.ResizeMode" Value="NoResize">
                        <Setter TargetName="minimizeButton" Property="Visibility" Value="Collapsed"/>
                        <Setter TargetName="maximizeButton" Property="Visibility" Value="Collapsed"/>
                    </Trigger>
                    <Trigger Property="Window.ResizeMode" Value="CanMinimize">
                        <Setter TargetName="maximizeButton" Property="IsEnabled" Value="False"/>
                    </Trigger>
                    <Trigger Property="WindowState" Value="Maximized">
                        <Setter TargetName="MaximizeWindowDecorator" Property="Margin" Value="6"/>
                        <Setter TargetName="maximizeButton" Property="Content">
                            <Setter.Value>
                                <telerik:RadGlyph Glyph="{StaticResource GlyphWindowCollapse}"/>
                            </Setter.Value>
                        </Setter>
                        <Setter Property="CornerRadius" Value="0"/>
                    </Trigger>
                    <MultiTrigger>
                        <MultiTrigger.Conditions>
                            <Condition Property="telerik:RadRibbonWindow.IsAutoHideTaskbar" Value="true"/>
                            <Condition Property="Window.WindowState" Value="Maximized"/>
                        </MultiTrigger.Conditions>
                        <Setter TargetName="MaximizeWindowDecorator" Property="Margin" Value="-7 -2 -7 -6"/>
                    </MultiTrigger>
                    <Trigger Property="IsTitleVisible" Value="False">
                        <Setter TargetName="WindowTitle" Property="Visibility" Value="Collapsed"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

Unplanned

Last Updated: 03 Jul 2025 13:55 by Vladimir

RichTextBox: ArgumentNullException when using FindReplaceDialog when the document contains footnotes

Created by: Vladimir

Comments: 1

Category: RichTextBox

Type: Bug Report

RichTextBox: ArgumentNullException when using FindReplaceDialog when the document contains footnotes

The editor used for the footnotes causes ArgumentNullException when trying to pass the dialog to it.

Unplanned

Last Updated: 02 Jul 2025 13:39 by Stenly

Spreadsheet: In some of the themes, the UI from the DataValidationListUILayer looks broken

Created by: Stenly

Comments: 0

Category: Spreadsheet

Type: Bug Report

Spreadsheet: In some of the themes, the UI from the DataValidationListUILayer looks broken

When applying a ListDataValidation, the created RadDropDownButton, which has a RadPathButton in it, looks broken when using the Windows11, Office2013, Office2019, and VisualStudio2019 themes.

Unplanned

Last Updated: 24 Jun 2025 14:54 by Martin Ivanov

PdfView: Rendered image position and size scaling is wrong for some document

Created by: Martin Ivanov

Comments: 0

Category: PDFViewer

Type: Bug Report

PdfView: Rendered image position and size scaling is wrong for some document

The size of some images in specific documents is scaled and positioned wrongly.

Unplanned

Last Updated: 24 Jun 2025 06:35 by ADMIN

Licensing: No license found for Telerik UI for WPF when using the Wix installer

Created by: Gerhard

Comments: 2

Category: UI for WPF

Type: Bug Report

Licensing: No license found for Telerik UI for WPF when using the Wix installer

No license found for Telerik UI for WPF when using Wix installer.

In Development

Last Updated: 20 Jun 2025 08:20 by ADMIN

Scheduled for 2025 Q3 (August)

DateRangePicker: ArgumentOutOfRangeException is thrown when the Separator property is set to a string that contains alpha-numeric/numeric "not required" mask tokens and the clear button is pressed

Created by: Stenly

Comments: 0

Category: DateRangePicker

Type: Bug Report

DateRangePicker: ArgumentOutOfRangeException is thrown when the Separator property is set to a string that contains alpha-numeric/numeric "not required" mask tokens and the clear button is pressed

An ArgumentOutOfRangeException is thrown when the Separator property is set to a string that contains alpha-numeric/numeric "not required" mask tokens, and the clear button is pressed. The control works with a custom RadMaskedTextInput control to parse different date and time patterns for the start and end dates, which replaces the mask tokens with a placeholder, resulting in the exception when updating the Value property of the RadMaskedTextInput when the value is cleared.

In Development

Last Updated: 20 Jun 2025 08:20 by ADMIN

Scheduled for 2025 Q3 (August)

ComboBox: ArgumentOutOfRangeException on ItemsSource reset when AllowMultipleSelection is True

Created by: Martin Ivanov

Comments: 0

Category: ComboBox

Type: Bug Report

ComboBox: ArgumentOutOfRangeException on ItemsSource reset when AllowMultipleSelection is True

ArgumentOutOfRangeException occurs when the ItemsSource of RadComboBox gets reset. To recreate this the IsSelected property of RadComboBoxItem should be bound too and multiple selection should be allowed.

To work this around, you can disable the autiomation peers globally:

AutomationManager.AutomationMode = AutomationMode.Disabled;

Or you disable them only for the RadComboBox:

public class CustomComboBox : RadComboBox
{
    protected override AutomationPeer OnCreateAutomationPeer()
    {
        return null;
    }
}

The stacktrace:

System.ArgumentOutOfRangeException: 'Index was out of range. Must be non-negative and less than the size of the collection. (Parameter 'index')'
  System.Private.CoreLib.dll!System.ThrowHelper.ThrowArgumentOutOfRange_IndexMustBeLessException() Unknown
  System.Private.CoreLib.dll!System.Collections.Generic.List<System.__Canon>.this[int].get(int index) Unknown  Telerik.Windows.Controls.Input.dll!Telerik.Windows.Automation.Peers.RadComboBoxAutomationPeer.RaiseSelectionEvents(System.Windows.Controls.SelectionChangedEventArgs e) Line 202 C#  Telerik.Windows.Controls.Input.dll!Telerik.Windows.Controls.RadComboBox.OnSelectionChanged(System.Windows.Controls.SelectionChangedEventArgs e) Line 1927 C#
  PresentationFramework.dll!System.Windows.Controls.Primitives.Selector.SetSelectedHelper(object item, System.Windows.FrameworkElement UI, bool selected) Unknown
  PresentationFramework.dll!System.Windows.Controls.Primitives.Selector.NotifyIsSelectedChanged(System.Windows.FrameworkElement container, bool selected, System.Windows.RoutedEventArgs e) Unknown
  PresentationCore.dll!System.Windows.EventRoute.InvokeHandlersImpl(object source, System.Windows.RoutedEventArgs args, bool reRaised) Unknown
  PresentationCore.dll!System.Windows.UIElement.RaiseEventImpl(System.Windows.DependencyObject sender, System.Windows.RoutedEventArgs args) Unknown
  Telerik.Windows.Controls.Input.dll!Telerik.Windows.Controls.RadComboBoxItem.OnSelected(System.Windows.RoutedEventArgs e) Line 59 C#
  PresentationFramework.dll!System.Windows.Controls.ListBoxItem.OnIsSelectedChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
  PresentationFramework.dll!System.Windows.StyleHelper.ApplyStyleOrTemplateValue(MS.Internal.FrameworkObject fo, System.Windows.DependencyProperty dp) Unknown
  PresentationFramework.dll!System.Windows.StyleHelper.InvalidateContainerDependents(System.Windows.DependencyObject container, ref MS.Utility.FrugalStructList<System.Windows.ContainerDependent> exclusionContainerDependents, ref MS.Utility.FrugalStructList<System.Windows.ContainerDependent> oldContainerDependents, ref MS.Utility.FrugalStructList<System.Windows.ContainerDependent> newContainerDependents) Unknown
  PresentationFramework.dll!System.Windows.StyleHelper.DoStyleInvalidations(System.Windows.FrameworkElement fe, System.Windows.FrameworkContentElement fce, System.Windows.Style oldStyle, System.Windows.Style newStyle) Unknown
  PresentationFramework.dll!System.Windows.StyleHelper.UpdateStyleCache(System.Windows.FrameworkElement fe, System.Windows.FrameworkContentElement fce, System.Windows.Style oldStyle, System.Windows.Style newStyle, ref System.Windows.Style styleCache) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnStyleChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty dp, bool preserveCurrentValue) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.UpdateStyleProperty() Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnInitialized(System.EventArgs e) Unknown
  Telerik.Windows.Controls.Input.dll!Telerik.Windows.Controls.RadComboBoxItem.OnInitialized(System.EventArgs e) Line 106 C#
  PresentationFramework.dll!System.Windows.FrameworkElement.OnVisualParentChanged(System.Windows.DependencyObject oldParent) Unknown
  PresentationFramework.dll!System.Windows.Controls.ListBoxItem.OnVisualParentChanged(System.Windows.DependencyObject oldParent) Unknown
  PresentationCore.dll!System.Windows.Media.Visual.FireOnVisualParentChanged(System.Windows.DependencyObject oldParent) Unknown
  PresentationCore.dll!System.Windows.Media.Visual.AddVisualChild(System.Windows.Media.Visual child) Unknown
  PresentationCore.dll!System.Windows.Media.VisualCollection.Add(System.Windows.Media.Visual visual) Unknown
  PresentationFramework.dll!System.Windows.Controls.UIElementCollection.AddInternal(System.Windows.UIElement element) Unknown
  PresentationFramework.dll!System.Windows.Controls.Panel.GenerateChildren() Unknown
  PresentationFramework.dll!System.Windows.Controls.Panel.OnItemsChangedInternal(object sender, System.Windows.Controls.Primitives.ItemsChangedEventArgs args) Unknown
  PresentationFramework.dll!System.Windows.Controls.Panel.OnItemsChanged(object sender, System.Windows.Controls.Primitives.ItemsChangedEventArgs args) Unknown
  PresentationFramework.dll!System.Windows.Controls.ItemContainerGenerator.OnRefresh() Unknown
  PresentationFramework.dll!System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.WeakEventManager.ListenerList<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.DeliverEvent(object sender, System.EventArgs e, System.Type managerType) Unknown
  WindowsBase.dll!System.Windows.WeakEventManager.DeliverEvent(object sender, System.EventArgs args) Unknown
  PresentationFramework.dll!System.Windows.Data.CollectionView.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.WeakEventManager.ListenerList<System.Collections.Specialized.NotifyCollectionChangedEventArgs>.DeliverEvent(object sender, System.EventArgs e, System.Type managerType) Unknown
  WindowsBase.dll!System.Windows.WeakEventManager.DeliverEvent(object sender, System.EventArgs args) Unknown
  PresentationFramework.dll!System.Windows.Data.CollectionView.OnCollectionChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs args) Unknown
  PresentationFramework.dll!System.Windows.Data.ListCollectionView.RefreshOverride() Unknown
  PresentationFramework.dll!System.Windows.Data.CollectionView.RefreshInternal() Unknown
  PresentationFramework.dll!System.Windows.Data.CollectionView.DeferHelper.Dispose() Unknown
  PresentationFramework.dll!System.Windows.Controls.ItemCollection.SetCollectionView(System.Windows.Data.CollectionView view) Unknown
  PresentationFramework.dll!System.Windows.Controls.ItemsControl.OnItemsSourceChanged(System.Windows.DependencyObject d, System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  PresentationFramework.dll!System.Windows.FrameworkElement.OnPropertyChanged(System.Windows.DependencyPropertyChangedEventArgs e) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.NotifyPropertyChange(System.Windows.DependencyPropertyChangedEventArgs args) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.UpdateEffectiveValue(System.Windows.EntryIndex entryIndex, System.Windows.DependencyProperty dp, System.Windows.PropertyMetadata metadata, System.Windows.EffectiveValueEntry oldEntry, ref System.Windows.EffectiveValueEntry newEntry, bool coerceWithDeferredReference, bool coerceWithCurrentValue, System.Windows.OperationType operationType) Unknown
  WindowsBase.dll!System.Windows.DependencyObject.InvalidateProperty(System.Windows.DependencyProperty dp, bool preserveCurrentValue) Unknown
  PresentationFramework.dll!System.Windows.Data.BindingExpression.TransferValue(object newValue, bool isASubPropertyChange) Unknown
  PresentationFramework.dll!MS.Internal.Data.PropertyPathWorker.UpdateSourceValueState(int k, System.ComponentModel.ICollectionView collectionView, object newValue, bool isASubPropertyChange) Unknown
  PresentationFramework.dll!MS.Internal.Data.ClrBindingWorker.OnSourcePropertyChanged(object o, string propName) Unknown
  WindowsBase.dll!System.Windows.WeakEventManager.ListenerList<System.ComponentModel.PropertyChangedEventArgs>.DeliverEvent(object sender, System.EventArgs e, System.Type managerType) Unknown
  WindowsBase.dll!System.ComponentModel.PropertyChangedEventManager.OnPropertyChanged(object sender, System.ComponentModel.PropertyChangedEventArgs args) Unknown
  Telerik.Windows.Controls.dll!Telerik.Windows.Controls.ViewModelBase.OnPropertyChanged(string propertyName) Unknown
> WpfApp180.dll!WpfApp180.MainViewModel.ResetData() Line 44 C#

In Development

Last Updated: 20 Jun 2025 08:20 by ADMIN

Scheduled for 2025 Q3 (August)

DragBehavior: GetPerMonitorDPIAwareScaleFactor throws an exception when the parameter visual is null and crashes the application

Created by: Alexander

Comments: 0

Category: UI for WPF

Type: Bug Report

DragBehavior: GetPerMonitorDPIAwareScaleFactor throws an exception when the parameter visual is null and crashes the application

GetPerMonitorDPIAwareScaleFactor throws an exception when the parameter visual is null and crashes the application.

Declined

Last Updated: 18 Jun 2025 12:51 by ADMIN

RadRichTextBox Change Tracking: RevisionInfo.Date is missing the seconds

Created by: Daniel

Comments: 2

Category: RichTextBox

Type: Bug Report

RadRichTextBox Change Tracking: RevisionInfo.Date is missing the seconds

Can be reproduced in the demo:

Open the default document in the radrichtextbox demo
Activate change tracking (button "Track Changes")
Make a modification to the document (delete a paragraph)
Hover your mouse over the delete text: the date in the revision info. has always ":00" for the seconds

In our processes, it is very important to know if a change happened before or after another action. If all the revisions have zero seconds, it's impossible to determine the order of the changes when they happened in the same minute.

This is not a new bug introduce in SP2: it was there in SP1.

Unplanned

Last Updated: 18 Jun 2025 04:44 by ADMIN

RichTextBox: HtmlformatProvider: Nested tables with empty cells are not correctly imported.

Created by: Naval

Comments: 8

Category: RichTextBox

Type: Bug Report

RichTextBox: HtmlformatProvider: Nested tables with empty cells are not correctly imported.

Nested tables with empty cells are not correctly imported.

Declined

Last Updated: 16 Jun 2025 11:32 by ADMIN

GridView: Setting an initial ColumnFilterDescriptor causes the RadGridView to not filter correctly when modifying the values of the filter

Created by: Stenly

Comments: 1

Category: GridView

Type: Bug Report

GridView: Setting an initial ColumnFilterDescriptor causes the RadGridView to not filter correctly when modifying the values of the filter

When an initial filter is set via the ColumnFilterDescriptor property of a column, changing the filter's value via the distinct values in the UI causes the control to not be filtered correctly.

Declined

Last Updated: 13 Jun 2025 14:37 by ADMIN

Licensing: Cannot resolve dependency to assembly Telerik.Licensing.Runtime error in a project that doesn't use any Telerik code, but references a class library that references Telerik nugets

Created by: Martin Ivanov

Comments: 1

Category: UI for WPF

Type: Bug Report

Licensing: Cannot resolve dependency to assembly Telerik.Licensing.Runtime error in a project that doesn't use any Telerik code, but references a class library that references Telerik nugets

A compilation error occurs in a project that doesn't use any Telerik code, but it references a class library which installs the Telerik.Licensing NuGet package.

The error message from the class library project is the following:

C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319\Microsoft.WinFx.targets(268,9): error MC1000: Unknown build error, 'Cannot resolve dependency to assembly 'Telerik.Licensing.Runtime, Version=1.4.6.0, Culture=neutral, PublicKeyToken=keyhere' because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.'

To workaround this, you can add assembly references to the Telerik dlls in the main project (including Telerik.Licensing.Runtime), instead of using NuGet packages.

Alternatively, you can install the Telerik.Licensing NuGet package also in the class library.

<ItemGroup>
	<PackageReference Include="Telerik.Licensing" Version="1.4.*" />
</ItemGroup>

Note that with this approach you will see a message in the output that no license is installed, even if you have one. However, for now (versions from 1.4.6 to 1.4.12, which is the latest at the moment of writting this post), the error won't apply any compile or runtime restrictions on the UI or the functionality.

In Development

Last Updated: 13 Jun 2025 05:51 by ADMIN

Scheduled for 2025 Q3 (August)

GridView: The scrolling becomes very slow when setting the left and right frozen columns to 0 and resizing the columns so that their summary width is smaller than the data grid's width

Created by: Martin Ivanov

Comments: 0

Category: GridView

Type: Bug Report

GridView: The scrolling becomes very slow when setting the left and right frozen columns to 0 and resizing the columns so that their summary width is smaller than the data grid's width

The vertical scrolling seems to become very slow and even unresponsive, when the following conditions are met:

left and right frozen columns count is 0
the summary width of all columns is smaller than the width of the RadGridView element

To minimize the issue, you can set the GroupRenderMode property of RadGridView to Nested.

In Development

Last Updated: 13 Jun 2025 05:51 by ADMIN

Scheduled for 2025 Q3 (August)

GridView: Cells are missing when scrolling when using right frozen columns with the RowIndicatorVisibility="Collapsed", CanUserFreezeColumns="False" and RightFrozenColumnsSplitterVisibility="Visible"

Created by: Stenly

Comments: 0

Category: GridView

Type: Bug Report

GridView: Cells are missing when scrolling when using right frozen columns with the RowIndicatorVisibility="Collapsed", CanUserFreezeColumns="False" and RightFrozenColumnsSplitterVisibility="Visible"

In a scenario where the RadGridView control utilizes the right frozen columns functionality with the RowIndicatorVisibility="Collapsed", CanUserFreezeColumns="False", and RightFrozenColumnsSplitterVisibility="Visible, cells can become missing while scrolling.

In Development

Last Updated: 13 Jun 2025 05:51 by ADMIN

Scheduled for 2025 Q3 (August)

GridView: The control hangs when resized and frozen columns are enabled (Fluent theme)

Created by: Martin Ivanov

Comments: 0

Category: GridView

Type: Bug Report

GridView: The control hangs when resized and frozen columns are enabled (Fluent theme)

The RadGridView control hangs when the frozen columns are enabled and the application is resized. The exact resizing depends on the screen resolution and the exact new size. This was originally recreated on a monitor with 1600x900 resolution 125% DPI and the application was maximized (resized from restored to full screen size). The issue occurs in the Fluent theme. Also, the FluentPalette.Palette.ScrollBarsMode static property should be set to Normal.

To work this around, you can overrider the MeasureOverride method of RadGridView and add the following code:

public class CustomGridView: RadGridView
{
    private static readonly PropertyInfo internalColumnsProp = typeof(GridViewDataControl).GetProperty("InternalColumns", BindingFlags.Instance | BindingFlags.NonPublic);
    private static MethodInfo invalidateColumnsMethod;

    protected override Size MeasureOverride(Size availableSize)
    {
        if (EnableRowVirtualization && !double.IsInfinity(availableSize.Height))
        {
            var internalColumns = internalColumnsProp.GetValue(this);
            if (invalidateColumnsMethod == null)
            {
                invalidateColumnsMethod = internalColumns.GetType().GetMethod("InvalidateColumnWidthsCalculation", BindingFlags.Instance | BindingFlags.NonPublic);                     
            }

            invalidateColumnsMethod.Invoke(internalColumns, null);
        }
        return base.MeasureOverride(availableSize);
    }

In Development

Last Updated: 10 Jun 2025 14:04 by ADMIN

Scheduled for 2025 Q3 (August)

ScheduleView: Multiple errors can be try/catch-ed (slowing down performance) in scenarios with a recurring appointment with no end date for its recurrence

Created by: Vladimir

Comments: 0

Category: ScheduleView

Type: Bug Report

ScheduleView: Multiple errors can be try/catch-ed (slowing down performance) in scenarios with a recurring appointment with no end date for its recurrence

When the RadScheduleView has a recurring appointment with no end date for its recurrence in certain scenarios multiple errors can be try/catch-ed internally, which leads to a degraded performance. One such scenario is when a recurring appointment with no end date starts before the currently displayed time period, but does not have any occurrences before the displayed time period.

As a workaround, an end date can be added to the recurrence rule of recurring appointments.

In Development