I have no idea how to reproduce this, but every so often after a paste operation into a RadRichTextBox, the host thread becomes unresponsive to user input. The message pump is still running but the following unhandled exception gets thrown in a tight infinite loop. The only way to close the window is to right click on the taskbar button.

System.NullReferenceException
Message: Object reference not set to an instance of an object.
Call Stack:
    at Telerik.Windows.Documents.Layout.LayoutElement.SetParent(LayoutElement newParent)
    at Telerik.Windows.Documents.Layout.LayoutBox.EnsureParent()
    at Telerik.Windows.Documents.Layout.LayoutBox.get_Parent()
    at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.get_IsEndOfCell()
    at Telerik.Windows.Documents.Layout.FormattingSymbolLayoutBox.GetFormattingSymbolVisual()
    at Telerik.Windows.Documents.SpanBoxPositionHandler.get_Location()
    at Telerik.Windows.Documents.UI.DocumentWebLayoutPresenter.GetViewPointFromDocumentPosition(DocumentPosition position)
    at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.CalculateLocation()
    at Telerik.Windows.Controls.RichTextBoxUI.PasteOptionsPopup.OnOwnerLayoutUpdated(Object sender, EventArgs e)
    at System.Windows.ContextLayoutManager.fireLayoutUpdateEvent()
    at System.Windows.ContextLayoutManager.UpdateLayout()
    at System.Windows.ContextLayoutManager.UpdateLayoutCallback(Object arg)
    at System.Windows.Media.MediaContext.FireInvokeOnRenderCallbacks()
    at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
    at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
    at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
    at System.Windows.Threading.ExceptionWrapper.TryCatchWhen(Object source, Delegate callback, Object args, Int32 numArgs, Delegate catchHandler)

In localizing your demo code for a RichTextBox I noticed some size mode-related inconsistencies in icon placements in the various sorts of buttons:

In Size=large, generally the icon appears above the button text. In the split button the icon is centered over and partially obscures the text. Unacceptable!

In Size=medium, generally the icon appears to the left of the text. In the Split button it appears below the text. Either is fine but should be consistent.

Also, when Size=medium and icon beside text, in all buttons I would like to see more spacing between the icon and the text; there seems to be virtually none.

Testing in the RadColorEditor control:
   looking the attachments,Select the two numbers on the left(the file "Select.png"),
then enter a number through the keyboard,just modified the number on the far left(the file "Input1.png").
But sometimes the two numbers that are selected are replaced,like the file "Input2.png".
Obviously the second case input experience is better!
Continuous restarts cause one of the two.

This is the most logged exception in my application and it looks like it's coming from RadToolBar: Specified element is already the logical child of another element. Disconnect it first.

Stacktrace:

Please add a property to disable the zoom witch CTRL+MouseWheel. Maybe something like IsMouseWheelZoomEnabled with a defaut value of true.

There are already other properties like IsPanningEnabled or ZoomToCursor.

The currently known solution is:

private void imageEditor_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
            if (Keyboard.IsKeyDown(Key.LeftCtrl) || Keyboard.IsKeyDown(Key.RightCtrl))
            {
                e.Handled = true;
            }
        }

Add a property to force only allowing uppercase values, without needing to specify a number of characters or have the underline in the control.

This is achievable in code, but it seems unnecessary to go to such lengths for each instance where it is needed.

using GroupStyle ,and setting : ScrollViewer.CanContentScroll="False",when click the item,
within the group,the ScrollViewer auto scroll up and down,don't using VirtualizingPanel.
but the microsoft ListBox is OK!

 the code like the follwoing:
    <telerik:RadListBox Width="250" ItemsSource="{Binding Data.View}" SelectionMode="Single"
                            ItemTemplate="{StaticResource ListBoxTemplate}"
                            ScrollViewer.CanContentScroll="False">
                    <telerik:RadListBox.GroupStyle>
                    <GroupStyle>
                        <GroupStyle.ContainerStyle>
                            <Style TargetType="{x:Type GroupItem}">
                                <Setter Property="Template">
                                    <Setter.Value>
                                        <ControlTemplate TargetType="{x:Type GroupItem}">
                                            <Expander IsExpanded="True"
                                           ExpandDirection="Down">
                                                <Expander.Header>
                                                    <StackPanel Orientation="Horizontal">
                                                        <TextBlock Text="{Binding Path=Name}"
                                                        VerticalAlignment="Center" />
                                                        <TextBlock Text="{Binding Path=ItemCount, StringFormat=Count:{0}}"
                                                        VerticalAlignment="Center"
                                                        Margin="5,0,0,0" />
                                                    </StackPanel>
                                                </Expander.Header>
                                                <ItemsPresenter />
                                            </Expander>
                                        </ControlTemplate>
                                    </Setter.Value>
                                </Setter>
                            </Style>
                        </GroupStyle.ContainerStyle>
                    </GroupStyle>
                </telerik:RadListBox.GroupStyle>
            </telerik:RadListBox>

The search box TextBox element used with the search-as-you-type feature is not focused when you press the Tab key. This happens because the search box is excluded from the tab order (IsTabStop=False).

Use the ChildrenOfType extension method to get the TextBox element and set its IsTabStop to True.

private void gridView_Loaded(object sender, RoutedEventArgs e)
{
	var searchBox = this.gridView.ChildrenOfType<TextBox>().FirstOrDefault(x => x.Name == "PART_SearchAsYouTypeTextBox");
	searchBox.IsTabStop = true;
}

Dear Telerik Team,

We are facing an issue in MaskedCurrencyInput when using Chinese keyboard. MaskedCurrencyInput control is showing numbers along with other characters that are not numeric. 
In case of typing alphabets, MaskedCurrencyInput is showing suggestion box of chinese characters and also showing alphabetic characters on input area.

This is working fine in English keyboards but in chinese keyboard Chinese Suggestion box and chinese characters are appearing which should not. 

Steps to Reproduce:
1- Use MaskedCurrencyInput of Telerik in XAML WPF.
2- Type alphabets e.g. abcd in MaskedCurrencyInput field box. Chinese Suggestion would appear.

Chinese Suggestion box and chinese characters should not appear. Kindly let me know if it would be resolved or any work around to stop this chinese suggestion box to be opened.

Hi there

This is a very impotent control in our company.
However, we need to implement a spell checker as you already have in RTF.

Eliezer Kaplansy PhD
CTO
Makeshet Information Systems

Hi,

   There is a bug in version 2019.3.1023.45 RadWindow when I minimum and restore window from task bar

when use the RadTransitionControl's SlideAndZoomTransition effect for the RadTabControl, the radComboBox Multiple Selection will lost in the  tabItem。

the  radComboBox data is from the mvvm binding,after change the tabitem,the Multiple Selection become single selection.

the RadTabControl's style is following:

           ...

           <ControlTemplate x:Key="TabControlTemplate" TargetType="telerik:RadTabControl">
        <Grid>
            <telerik:RadDockPanel LastChildFill="True">
                <telerik:LayoutTransformControl x:Name="HeaderDockedElement" telerik:RadDockPanel.Dock="Top">
                    <Grid SnapsToDevicePixels="True">
                        <Border x:Name="HeaderBackground" Background="{TemplateBinding HeaderBackground}" Visibility="{TemplateBinding BackgroundVisibility}"/>
                        <telerik:RadDockPanel Panel.ZIndex="10">
                            <telerik:LayoutTransformControl x:Name="AdditionalContentTransform" Margin="0" telerik1:RadDockPanel.Dock="Right">
                                <ContentPresenter x:Name="AdditionalContentElement" Content="{TemplateBinding AdditionalContent}"/>
                            </telerik:LayoutTransformControl>
                            <ToggleButton x:Name="DropDownButtonElement"
                                    Visibility="Collapsed"
                                    telerik:RadDockPanel.Dock="Right"
                                    Style="{TemplateBinding DropDownButtonStyle}"
                                    ClickMode="Press"
                                    IsChecked="{Binding IsDropDownOpen, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}">
                                <telerik:RadContextMenu.ContextMenu>
                                    <telerikTabControl:DropDownMenu x:Name="DropDownMenuElement"
                                            StaysOpen="False"
                                            Placement="Bottom"
                                            Style="{TemplateBinding DropDownStyle}"
                                            ItemTemplate="{TemplateBinding ItemDropDownContentTemplate}"
                                            ItemTemplateSelector="{TemplateBinding ItemDropDownContentTemplateSelector}"
                                            DisplayMemberPath="{TemplateBinding DropDownDisplayMemberPath}"/>
                                </telerik:RadContextMenu.ContextMenu>
                            </ToggleButton>
                            <RepeatButton x:Name="LeftScrollButtonElement" Style="{StaticResource ScrollButtonStyle}">
                                <telerik:RadGlyph Glyph="{StaticResource GlyphArrowChevronLeft}"/>
                            </RepeatButton>
                            <RepeatButton x:Name="RightScrollButtonElement" Style="{StaticResource ScrollButtonStyle}" telerik:RadDockPanel.Dock="Right">
                                <telerik:RadGlyph Glyph="{StaticResource GlyphArrowChevronRight}"/>
                            </RepeatButton>
                            <ScrollViewer x:Name="ScrollViewerElement"
                                    Style="{StaticResource EmptyScrollViewerStyle}"
                                    VerticalScrollBarVisibility="Disabled"
                                    BorderThickness="0"
                                    IsTabStop="False"
                                    HorizontalScrollBarVisibility="{Binding (ScrollViewer.HorizontalScrollBarVisibility), RelativeSource={RelativeSource TemplatedParent}}">
                                <ItemsPresenter/>
                            </ScrollViewer>
                        </telerik:RadDockPanel>
                    </Grid>
                </telerik:LayoutTransformControl>
                <Border x:Name="ContentBorder"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness, Mode=TwoWay}"
                        Background="{TemplateBinding Background}"
                        Padding="{TemplateBinding Padding}">
                    <Grid>
                       
                        <telerik:RadTransitionControl x:Name="ContentElement"
                                            Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsContentPreserved,Converter={StaticResource InvertedBooleanToVisibilityConverter}}"
                                            Content="{TemplateBinding SelectedContent}"
                                            ContentTemplate="{TemplateBinding SelectedContentTemplate}"
                                            ContentTemplateSelector="{TemplateBinding SelectedContentTemplateSelector}"
                                            Duration="00:00:00.350">
                            <telerik:RadTransitionControl.Transition>
                                <local:TransitionSetFP>
                                    <local:TransitionSetFP.BackTransition>
                                        <telerik:SlideAndZoomTransition SlideDirection="LeftToRight" MinZoom="1" StartSlideAt="0.01" MinAlpha="1"/>
                                    </local:TransitionSetFP.BackTransition>
                                    <local:TransitionSetFP.ForwardTransition>
                                        <telerik:SlideAndZoomTransition SlideDirection="RightToLeft" MinZoom="1" StartSlideAt="0.01" MinAlpha="1"/>
                                    </local:TransitionSetFP.ForwardTransition>
                                </local:TransitionSetFP>
                            </telerik:RadTransitionControl.Transition>
                        </telerik:RadTransitionControl>
                        <Grid x:Name="ContentElementsPanel" Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=IsContentPreserved, Converter={StaticResource BooleanToVisibilityConverter}}"/>
                    </Grid>
                </Border>
            </telerik:RadDockPanel>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="DropDownDisplayMode" Value="Visible">
                <Setter Property="Visibility" Value="Visible" TargetName="DropDownButtonElement"/>
            </Trigger>
            <MultiTrigger>
                <MultiTrigger.Conditions>
                    <Condition Property="DropDownDisplayMode" Value="WhenNeeded"/>
                    <Condition SourceName="ScrollViewerElement" Property="ComputedHorizontalScrollBarVisibility" Value="Visible"/>
                </MultiTrigger.Conditions>
                <Setter Property="Visibility" Value="Visible" TargetName="DropDownButtonElement"/>
            </MultiTrigger>
            <Trigger Property="TabStripPlacement" Value="Top">
                <Setter Property="BorderThickness" TargetName="ContentBorder" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness, Converter={StaticResource ThicknessToOrientedThicknessConverter}, ConverterParameter=LeftBottomRight}"/>
            </Trigger>
            <Trigger Property="TabStripPlacement" Value="Left">
                <Setter TargetName="DropDownMenuElement" Property="HorizontalOffset" Value="0"/>
                <Setter TargetName="DropDownMenuElement" Property="VerticalOffset" Value="-3"/>
                <Setter Property="telerik:RadDockPanel.Dock" Value="Left" TargetName="HeaderDockedElement"/>
                <Setter Property="telerik:RadDockPanel.Dock" Value="Left" TargetName="AdditionalContentTransform"/>
                <Setter Property="telerik:RadDockPanel.Dock" Value="Left" TargetName="DropDownButtonElement"/>
                <Setter Property="LayoutTransform" TargetName="HeaderDockedElement">
                    <Setter.Value>
                        <RotateTransform Angle="-90"/>
                    </Setter.Value>
                </Setter>
                <Setter Property="BorderThickness" TargetName="ContentBorder" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness, Converter={StaticResource ThicknessToOrientedThicknessConverter}, ConverterParameter=TopRightBottom}"/>
            </Trigger>
            <Trigger Property="TabStripPlacement" Value="Right">
                <Setter TargetName="DropDownMenuElement" Property="HorizontalOffset" Value="0"/>
                <Setter TargetName="DropDownMenuElement" Property="VerticalOffset" Value="3"/>
                <Setter Property="LayoutTransform" TargetName="HeaderDockedElement">
                    <Setter.Value>
                        <RotateTransform Angle="90"/>
                    </Setter.Value>
                </Setter>
                <Setter Property="BorderThickness" TargetName="ContentBorder" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness, Converter={StaticResource ThicknessToOrientedThicknessConverter}, ConverterParameter=TopLeftBottom}"/>
            </Trigger>
            <Trigger Property="TabStripPlacement" Value="Bottom">
                <Setter TargetName="DropDownMenuElement" Property="HorizontalOffset" Value="3"/>
                <Setter Property="telerik:RadDockPanel.Dock" Value="Left" TargetName="AdditionalContentTransform"/>
                <Setter Property="telerik:RadDockPanel.Dock" Value="Left" TargetName="DropDownButtonElement"/>
                <Setter Property="LayoutTransform" TargetName="HeaderDockedElement">
                    <Setter.Value>
                        <RotateTransform Angle="180"/>
                    </Setter.Value>
                </Setter>
                <Setter Property="LayoutTransform" TargetName="AdditionalContentTransform">
                    <Setter.Value>
                        <RotateTransform Angle="180"/>
                    </Setter.Value>
                </Setter>
                <Setter Property="BorderThickness" TargetName="ContentBorder" Value="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=BorderThickness, Converter={StaticResource ThicknessToOrientedThicknessConverter}, ConverterParameter=TopRightLeft}"/>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
    <Style TargetType="telerik:RadTabControl">
        <Setter Property="mat:MaterialAssist.ShadowDepth" Value="Depth1"/>
        <Setter Property="TextOptions.TextRenderingMode" Value="ClearType"/>
        <Setter Property="BorderBrush" Value="{telerik1:FluentResource ResourceKey=BasicBrush}"/>
        <Setter Property="HeaderBackground" Value="{telerik1:FluentResource ResourceKey=MainBrush}"/>
        <Setter Property="BorderThickness" Value="1"/>
        <Setter Property="Background" Value="{telerik1:FluentResource ResourceKey=PrimaryBackgroundBrush}"/>
        <Setter Property="MinWidth" Value="5"/>
        <Setter Property="MinHeight" Value="20"/>
        <Setter Property="HorizontalContentAlignment" Value="Stretch"/>
        <Setter Property="VerticalContentAlignment" Value="Stretch"/>
        <Setter Property="IsTabStop" Value="False"/>
        <Setter Property="FontFamily" Value="{telerik1:FluentResource ResourceKey=FontFamily}"/>
        <Setter Property="FontSize" Value="{telerik1:FluentResource ResourceKey=FontSize}"/>
        <Setter Property="Foreground" Value="{telerik1:FluentResource ResourceKey=MarkerBrush}"/>
        <Setter Property="ItemsPanel">
            <Setter.Value>
                <ItemsPanelTemplate>
                    <Primitives:TabWrapPanel/>
                </ItemsPanelTemplate>
            </Setter.Value>
        </Setter>
        <Setter Property="DropDownButtonStyle" Value="{StaticResource DropDownButtonStyle}"/>
        <Setter Property="DropDownStyle" Value="{StaticResource DropDownMenuStyle}"/>
        <Setter Property="ScrollViewer.HorizontalScrollBarVisibility" Value="Auto"/>
        <Setter Property="Template" Value="{StaticResource TabControlTemplate}"/>
    </Style>
 

After installing the WPF software I was not able to open any project in VS 2017 without it hanging.

In the end I removed the VS integration and was able to resume development.

It was the only Telerik component I had installed. I can't find the version number but it was the latest of the website as of 17th Oct 2019.

Can you explain why this happened?

Hi Telerik-Team,

When creating a new item in the GridView by either mouse or insert button the row is not selected or highlighted.

I guess this is a bug, since a cell in the new row has focus but not the row.

Best regards,

Mats