Release History

Telerik UI for Silverlight is Retiring

Driven by the evolution of technology and industry standards, Progress Software is deprecating Telerik UI for Silverlight effective December 1, 2023. Technical support and critical fixes will be available until December 1, 2024.

UI for Silverlight Q2 2015

June 22, 2015

New Controls

  • RadWizard(Official Release)
    • RadWizard helps you to differentiate a complex process into separate steps through intuitive UI. It is useful for facilitating installations, registrations and other types of step-by-step processes.​

All Controls

  • Added new WPF Visual Studio templates projects:
    • Outlook-Inspired Template: This template in Visual Studio will help you if you need to start an application that mimics the whole functionality of MS Outlook.
    • Outlook-Inspired Mail Template: This template in Visual Studio will help you if you need to start an application that mimics the mail functionality of MS Outlook.
    • Outlook-Inspired Calendar Template: This template in Visual Studio will help you if you need to start an application that mimics the calendar functionality of MS Outlook.
  • Improvements in Disabled states among all controls in Office2013 theme.


  • The Autocomplete looks too light when disabled in Windows8 theme.


  • Overflow button and its dropdown content have double border in MouseOver state in VisualStudio2013 theme.
  • A border is missing between the Breadcrumb control and the history drop down.
  • Height of Breadcrumb was changed to be 26px in Office2013 theme and 22px in VisualStudio2013 theme.


  • Setting CornerRadius to DropDownButton and SplitButton affects Popup CornerRadius.


  • Added support for automatic step recalculation for the chart's axes based on the axis size, so that labels do not overlap.
  • A NullReferenceException is thrown when removing pie series on mouse click.


  • TemplateBinding for BorderThickness in MouseOver state is missing in NonEditableComboBox for VisualStudio2013, Office2013 and Windows8 themes.
  • The background of non editable ComboBox is changed to be the same as the ToggleButton in Office2013 theme.


  • ValidationSummary.HasErrors property always returns false.
  • DataFormValidationSummary Errors and HasErrors properties are now read-only. Errors still support modifications of its items (add/remove), but it no longer has a public setter.


  • Using RadDateTimePicker with Implicit Styles and there is a BasedOn Style for it, is not visible in the designer and throws designer error.
  • DateTimePicker ignores padding in Windows8, Office2013 and VisualStudio2013 themes.


  • Diagram Layout is not correct when IgnoreContainers of the TreelayoutSettings or SugiyamaSettings is True.


  • Added three different modes for retaining the Pane sizes while docking/undocking (via the new RetainPaneSizeMode property).
  • When dragging a pane, the generated РўoolWindow is shown at top left for a short duration.
  • When RadDocking is in Deferred DradDropMode, any panes added at run time cannot be dragged.


  • GanttView MinorTick interval text is missing in VissualStudio2013 and Office2013 themes.


  • Introduced validation tooltip to InvalidEditableIndicator of a row.
  • Introduced new virtualization mechanism for ColumnGroups. A property EnableColumnGroupsVirtualization is exposed with default value True for enabled virtualization. Setting it to False will enable the old logic.
  • Current cell and selected row are losing sync when navigating in RadGridView.
  • Linq Operations are not working with DataTable which GetRowType and NewRowFromBuilder methods are overridden.
  • Exporting to Xlsx with empty cell causes error in excel file.
  • Memory leak when there is a ControlPanelItem with a custom content or custom button content.
  • TextTrimming, TextAlignment and TextWrappingProperty properties set through an implicit style targeting TextBlock is not applied on scrolling.
  • CellBorders are not applied when setting with Style in GridViewDocumentVisualExportParameters.
  • When there are frozen columns with ColumnGroups, all UI operations' performance is degraded.
  • ColumnGroups get misaligned after scrolling horizontally.
  • Memory leak with touch-draggable elements (GridViewHeaderCell, FrozenColumnSplitter).
  • Double borders appear when a cell is validated In Windows8Touch theme.
  • Application hangs when changing column's visibility and there are ColumnGroups defined.
  • The content of "ShowRowsWithValue" label within FilteringControl is truncated with localization in Windows8Touch theme.
  • Left validation border disappears while scrolling RadGridView in VS2013 theme.

  • GridViewToggleButtonAutomationPeer now implements TogglePattern.
  • A new visual element that is used in the virtualization layout is introduced - GridViewColumnGroupRow. Styles and templates that are related to it should be added to any existent custom themes.
  • Based on feedback from clients, we introduced a few behavioral changes (only when EnableColumnVirtualization is True), aiming to improve visual presentation:
    • When scrolling horizontally, the first CommonColumnHeader's content is aligned to be visible until it gets scrolled off viewport.
    • Empty cells that display the lack of ColumnGroup on a certain level are now merged.
    • No empty rows are displayed for ColumnGroup hierarchy levels that are initialized, but never used.
    • Freezing some of the columns that are related to a CommonColumnHeader, now splits the header in two identical headers to emphasize that those columns that were not frozen belong to the same ColumnGroup


  • Added Label support for HeatMap's cells.

Image Editor

  • Introduced Shape tool for drawing different shapes over an image.


  • The selected item is not changed when the "Current" of the bound ICollectionView is moved if the control was reloaded.


  • Scale and MouseLocationIndicator do not respect changing FontSize through the palette in Windows8, Windows8Touch, Office2013 and VisualStudio2013 themes.
  • The pinch gesture does not zoom in/out the map.

MS Controls

  • Default background of Microsoft Button and RepeatButton is changed in Office2013 theme.


  • Setting HeaderBackground property does not change the MinimizedButton's background in Windows8, Office2013 and VisualStudio2013 themes.
  • Title Foreground, FontFamily and FontWeight gets lost when you have TitleTemplate set and change themes runtime with implicit styles theming mechanism.

PDF Viewer

  • [SL] Provided ability to set OpacityThreshold in PrintSettings.
  • Implemented Progressive DCT for JpegDecoder.
  • SimpleFont MissingWidth value is calculated as zero instead of fractional double value.
  • Glyph font size is not included in glyph stroke thickness calculations.
  • RadPdfViewer does not show the context menu on TapAndHold gesture.
  • Some Jpeg images are not rendered correctly in PdfViewer.
  • Binding to an instance of FixedDocumentViewerCommands or FixedDocumentViewerCommandDescriptors causes memory leak.
  • Added the ability to make UI elements in custom UI layers focusable.
  • JpegDecoder cannot handle FFFF marker during ScanDecode.
  • JpegDecoder does not interpret DRI marker correctly in Baseline DCT.


  • Introduced API for merging PDF documents.
  • Implemented loading ImageSource on demand when importing PDF documents.
  • Introduced API for accessing image data.
  • Implemented support for import and export of TrueType fonts.
  • Implemented support for import and export of text showing content stream operators.
  • Implemented support for import and export of text positioning content stream operators.
  • Optimized performance when Image objects are imported and exported by not decoding and encoding the image data.
  • Provided API for inserting and retrieving images as encoded image data.
  • Image is not imported correctly if the stream position is not at the beginning of the stream.
  • Exception is thrown on import when there is no carriage return symbol after stream keyword.


  • System.IO.FileNotFoundException is thrown by the IsolatedStoragetProvider when calling its SaveToStorage() method and CLR exceptions are enabled.
  • The GetIsolatedStoreOverride method returns a wrong Isolated storage file.


  • The "More fields" FieldTree item is not localized.
  • Max aggregate function calculates wrong results for decimal values.


  • Tabbing out of SingleEditMode PropertyGridFields raises EditEnded with wrong arguments.
  • MemoryLeak when updating the Item property.


  • RadialMenuItem command is executed before MouseUp.


  • Backstage now supports keyboard navigation.
  • When the RibbonWindow is in maximized state, a black bar appears around its content.
  • RibbonWindow doesn't respect the OS taskbar location, when it is different than bottom.
  • The RibbonWindow buttons are not displayed when ShowInTaskbar is set to false.
  • RibbonView buttons are not consistent on MouseOver in Windows8 theme.
  • Path and Border of RibbonComboBox in NonEditable variant do not respect Disabled state in Office2013 theme.
  • ViewportWidth of RadGallery is bigger than ItemWidth in Windows8Touch theme.
  • RibbonGallery's buttons are clipped and DropDownButton's Path is not centered in Windows8Touch theme.
  • Application Button, ApplicationMenu and QAT FontSize default value is changed to 15 px in Windows8Touch and Office2013 themes.
  • Application Menu and ApplicationDropDown button look and feel improvements for all themes.
  • The Backstage FontSize and FontFamily properties in Windows8, Windows8Touch, Office2013 and VisualStudio2013 themes are now set in the default style.
  • RibbonWindow Background changed to match the Background of other controls in ExpressionDark theme.


  • Exposed API in SelectionRange to identify if the selected element is table, row or cell.
  • Implemented pasting of new table with the respective number of rows and cells when copying and pasting a table column.
  • Introduced command for unmerging table cells.
  • Exposed API for registering custom fields which need paginated document to work correctly.
  • StreamFromUriResolving event is not raised on the main document when an InsertPictureField is included in header/footer.
  • Going into header/ footer mode does not raise CommandExecuting/Executed event when double-clicking.
  • FooterBottomMargin or HeaderTopMargin properties are not properly respected when the document is created from code.
  • Memory leak when a style in the main document refers to document elements in header and footer.
  • Changing fields display mode of the main editor does not affect the fields in header/footer.
  • Copy-paste of two adjoining tables with different column count results in a broken layout of the second table.
  • Docx Format Provider: Exporting non committed IME text's decoration underline throws exception.
  • Watermark is not drawn behind headers and footers content when exported to PDF.
  • RadRichTextBox does not show the context menu on TapAndHold gesture.
  • When UpdateAllFields is called all PageReferenceFields and PageFields are updated to 1.
  • When linked style is applied over Р° paragraph, only its paragraph part should be applied. When linked style is applied over selection of words, only its character part should be applied.
  • Field code and result fragments do nРѕt inherit style properties from its parent if they are not locally set when importing RTF document.
  • Importing XAML documents which contains multiple line or page breaks in a single Span and are exported with past versions of the provider causes loss of text.
  • Deprecated FieldsUpdateManager.RegisterFieldUpdatePriority method. Use FieldsUpdateManager.RegisterFieldUpdateInfo instead.


  • Clearing a bound to the SpecialSlotsSource collection causes memory leak.
  • NullReferenceException is thrown when DaysOfMonth property of the RecurrencePattern is changed to null.
  • Incorrect recurrence dialog localization strings in French.
  • When importing custom Appointment with custom Resources, CalendarImporterBase throws exception.


  • Words in Hebrew or other languages which do not have capital letters are not spell checked.


  • Introduced support for setting style properties of rows and columns.
  • Introduced "Summary Rows Below Detail" and "Summary Columns to Right of Detail" properties to control the position of grouping's summary row/column.
  • Import of the content of macro-enabled workbooks.
  • The SetValue method that takes ICellValue as parameter should throw exception if null is passed as parameter.
  • RadSpreadsheet crashes when a document with merged columns is imported or exported.
  • Column style is not properly applied.
  • Removed obsolete API. For more information and detailed list of removed API, please check the following link.


  • Added CellEditorBase.Insert method to insert text at the current caret position.
  • Introduced support for setting style properties of rows and columns.
  • Introduced UI for hidden rows and columns.
  • Import of the content of macro-enabled workbooks.
  • Fill tab in Format Cells Dialog is not aligned in VisualStudio2013 theme.
  • The pattern color dropdown button has wrong size in Office2013 theme.
  • The style name textbox in cell style dialog is resizing on typing in Windows8Touch theme.
  • Up and down buttons in Sort dialog are too small in VisualStudio2013 theme.
  • Inconsistences in font size of Protect Sheet and Protect Workbook buttons in Office2013 theme.
  • Border tab in FormatCell is not aligned properly.
  • The SetValue method that takes ICellValue as parameter should throw exception if null is passed as parameter.
  • [WPF] The method GetBoundsRelativeTo throws InvalidOperationException when RadSpreadsheet is shown.
  • RadSpreadsheet crashes when a document with merged columns is imported or exported.
  • Column style is not properly applied.
  • Gallery Headers have black foreground instead of white foreground in Windows8Touch theme.
  • Border presets are clipped in Border tab of Format Cell dialog in Office2013 theme.
  • PageSetup dialog has different width in different tabs in Windows8Touch theme.
  • SheetSelector crashes on close when there are more sheet tab items than available space.
  • Removed obsolete API. For more information and detailed list of removed API, please check the following link.


  • Tile exposes Command, CommandTarget and CommandParameter dependency properties.
  • Groups' display indices are not initialized if they are added in code behind one by one.
  • Incorrect calculation of available rows when there are more instances of RadTileList in one view.
  • RadTileList is hold by TilesPlacementLocator when the control is unloaded, thus causing a memory leak.
  • A tile belongs to two groups when reordering between multiple groups.
  • Groups having equal items count are overlapped when they are being resized.


  • SelectionRange Title FontSize can not be changed dynamically in Windows8, Windows8Touch and Office2013 themes.
  • ItemControl and GroupControl's FontSize default values are changed to 12px and 20px respectively in VisualStudio2013 theme.


  • ToolTipTemplate is not applied when the tooltip is set on a RadTimeline's ItemControl and the timeline is zoomed out while tooltip is open.
  • ToolTipService shows tooltips for elements that are not hovered if their parent element also has set ToolTipContent.

Touch Manager

  • TouchIndicator is now represented by a single circle.
  • The type of the attached property TouchManager.IsTouchHitTestVisible is changed from bool? with default value Null to bool with default value True.


  • RadTabControl with ContentPresenter replaced by RadTransitionControl breaks design time in VisualStudio 2010.


  • Connecting lines are not rendered correctly when filtering TreeListView.
  • Connecting lines are not rendered correctly when sorting TreeListView.
  • Left validation border disappears while scrolling RadTreeListView in VS2013 theme.


  • Improved DragDrop on Touch Devices. Drag Drop is now possible with holding the finger on TreeViewItem and then moving it.
  • Added a protected virtual CreateDragVisualContent method for customizing the Content of the DragVisual.
  • MouseOver state on Expand/Collapse ToggleButton is added for all themes.


  • When RadWindow is maximized and the DPI is higher than 100%, the header buttons are not visible.
  • RadWindow crashes XAML designer in Office 2013 theme.
  • The Textbox in the Prompt Window doesn't get the focus with ExpressionDark theme.


  • WizardPage.ButtonVisibilityMode = "None" is not respected if set initially.
  • Swapped the positions of the Cancel and Finish buttons in order to be consistent with other types of Wizard controls.

UI for Silverlight


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