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 Q3 2015 SP1

November 3, 2015

All Controls

  • The Text property of the MS TextBox is not shown in the CodedUI and it has Telerik.UIA technology name when the Extension.Core assembly is used.
  • TextBox is not recognized properly if nested in another control when recording CodedUI test.


  • There is no highlighted item when pasting a letter using mouse interactions.
  • NullReferenceException is thrown in the InitializeTextBoxPart() method when the control is disposed by its Dispose() method.


  • Decimal numbers 0 after the decimal point are not displayed until a different than 0 number is entered.


  • Axis is rendered incorrectly in a remove-add scenario.
  • Chart produces a legend item without a marker fill when the series is collapsed initially.
  • Non-positive values are incorrectly plotted as 1 on a logarithmic axis.


  • IsEditable ComboBox loses template binding background in Office2013 theme.


  • Exception is thrown when the ErrorTooltipContent is set to null and the current input cannot be parsed.
  • DateTimePicker internally breaks OneWay binding to the SelectedValue when selecting through the UI.


  • StackOverflow exception is thrown when the diagram is layouted with AStarRouter and connection bridges.
  • NullReferenceException is thrown by shape resizing.


  • Support for disabling the export of particular columns. GridViewDocumentExportOptions exposes a new property - ExcludedColumns of type IList<GridViewColumn>. When a column is added to that collection, it will not be exported.
  • Changing CreateItem method's access modifier from internal virtual to protected internal virtual.
  • Setting DragElementAction to "ExtendedSelect" prevents from deselecting with Ctrl + mouse click.
  • Changing AlternateRowBackground at run-time is not visually respected untill RadGridView is measured.
  • DataBinding is lost when setting a DataTemplate as ContentTemplate for GridViewCell.
  • ArgumentNullException is thrown on sorting GridViewExpressionColumn without Expression property being set.
  • Pressing Enter key when SelectionUnit is "Cell" does not move down the focus and selection.
  • When a cell is marked as invalid by a data error (INotifyDataErrorInfo, IDataErrorInfo), entering valid content does not remove the error until the edit operation is commited.
  • Updating language should not recreate DataMemberBinding if it has been null or modify its BindingMode.
  • IsPropertyChangedAggregationEnabled property cannot be set using Style.
  • NullReferenceException is thrown in SetIsTouchHitTestVisible when entering in edit mode of GridViewCombobox column.
  • Focus stays always on first element in predefined CellTemplate/CellEditTemplate.
  • ArgumentNullException is thrown in StringFilterEditorAutomationPeer.GetChildrenCore method.


  • Added a new property "IsScrollIntoViewEnabled" that allows selection of an item without scrolling to it.


  • IndexOutOfRangeException is produced when removing and adding points in PolylineData at runtime.
  • Missing image from CommandBar ShowLabels button in OfficeBlack, OfficeBlue, OfficeSilver, Summer, Vista, Transparent, ExpressionDark and Windows7 themes.


  • MaskedCurrencyInput with French Culture throws FormatException when pressing Up / Down arrow keys.
  • Cannot change value from 10 to 9 or from -1 to 0 in CurrencyInput and NumericInput with Mask="" and SpinMode="PositionAndValue".


  • MenuItem is not disabled when placed in MenuGroupItem and command's CanExecute returns false.

MS Controls

  • TextBox in Office2013 has a negative outer margin when disabled that hides parts of the hosting element.

PDF Viewer

  • When scrollbar width is changed, Fit To Width option does not set the width to fit the screen.
  • PDF document containing two cross reference tables does not merge defined entries correctly.
  • Fixed BindingExpression path errors.


  • Font that is not embedded and does not have FontFamily cannot be imported.
  • MediaBox, Rotate and Resources properties are not inherited from the parent Pages node.
  • Dash character is not exported when using standard fonts.


  • Property of type GridLength cannot be edited.


  • Exception is thrown (Width and Height must be non-negative) in the WindowTitlePanel when resizing.


  • The color pickers in RadRichTextBoxRibbonUI do not track the current style in the document.
  • HTML Format Provider: Table width style property is not imported correctly when the value is in points.
  • Paragraph formatting is lost when a field result fragment has multiple lines.
  • HTML Format Provider: Рўable width style property is not imported correctly when the value is in inches.
  • RTF Format Provider: Nested fields are imported as raw text .
  • Deleting middle column in a table, which has vertically merged cells in the first and the last columns, results in a wrong table layout.
  • Merging vertically equal number of table cells in all columns in a table with cell spacing leads to frozen UI.


  • An appointment can be dropped outside the visible hours when dragged to the top of the DayView, if SnapAppointments is enabled and DayStartTime is set.
  • GroupHeader's Content height is too small and cuts off the name of the days in the WeekViewDefinition in Windows8 theme.


  • Implemented public API for retrieving the used cell range for a specific property.
  • SetValue(DateTime value) overload resets previously set format.
  • Visibility property value is not respected and hiding/unhiding sheets does not work.
  • Cells without style id are not imported correctly which may lead to incorrect formatting.
  • Setting empty string using SetValueAsText creates document which can not be imported using Excel.
  • KeyNotFoundException is thrown when importing number formats with id 41, 42, 43 or 44.
  • Text in rows with zero height is rendered as dots when exporting to PDF.
  • Importing or creating formatCode string "General" is interpreted as text instead of General number format.


  • Cells without style id are not imported correctly which may lead to incorrect formatting.
  • Updating a number in a cell that is used in a formula as a referred one breaks the alignment of the cell which contains the result.
  • Text in rows with zero height is rendered as dots when exporting to PDF.
  • Setting the Workbook property using Task in the UI thread causes RadSpreadsheet to freeze.
  • Importing or creating formatCode string "General" is interpreted as text instead of General number format.


  • AutogeneratingTile event is not thrown if a new item is added to the source collection.
  • Command of a Tile is not executed when using Touch.


  • RadTreeListView throw an InvalidCastException when adding heterogeneous child items while having defined filtering.
  • Setting TreeLinesVisibility to "Hidden" at run-time does not hide the TreeLines.


  • The binding is not applied initially on a RadMaskedInput's Value defined in the ItemEditTemplate.


  • Window content is hidden after it was first closed then shown, minimized and maximized.


  • NullReferenceException when creating ZIP archive bigger than 4 GB.

UI for Silverlight


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