Telerik UI for Winforms

Release History

UI for WinForms R3 2023 (version 2023.3.1010)

October 11, 2023

What's new

  • New Control: RadPipsPager - allows the users to navigate through paginated content that is displayed linearly.
  • New Control: RadSlideView - flexible navigation control that allows you to slide between different views.
  • New component: RadNotifyIcon - adds notification icon in the notification tray for a specific application.
  • Windows 11 Dark Theme


  • Search textbox is now working in .NET Core.


  • Slow loading time when setting the ConnectionBridge.
  • The rotate icon must be hidden from the selected text shape using the text tool.


  • GridViewSpreadExport duplicates parent rows with no child records when exporting all child tabs.
  • GridAggregateFunction.StDev causes DivideByZeroException if all values are equal to 0 in the column.
  • NullReferenceException when dragging an item from the ColumnChooser to the grid at Telerik.WinControls.UI.RadGridViewDragDropService.GetDragImageHint.
  • Changes to the bound ObservableCollection are not reflected in the control in .NET 7.


  • Add hit-testing of the MSAA details cell accessible object and expose its text.


  • Introduce ReadOnly property that stops user interaction: context menu and zoom.


  • Bind to ICustomTypeProvider.


  • New AutoCheck property.


  • Introduced support for exporting documents containing BIN images.
  • Resizing, maximizing or restoring a window which hosts RichTextEditor containing table in Flow layout mode moves the table borders unexpectedly.
  • Sometimes Double mouse clicks will not execute when clicking into the middle of a letter.
  • Wrong tab stop position when copying form RichTextBox and pasting in Word.
  • The FontFamilly is not preserved when one is pasting from WordPad.
  • Importing a document that does not have a valid styles table causes NullReferenceException.


  • When ShowEmbeddedLabel property is enabled the text box does not receive focus if it is set with the Control.Focus method.


  • Caret is not moved with arrow keys when text with 50K characters are set.


  • The context menu of the initially selected node inside the property builder is not synced.
  • Node's Image can't be changed at design time when using an ImageList and PropertyBuilder.


  • Expose API to round the form's corners on Windows 11.


  • Add the Microsoft.AnalysisServices.AdomdClient dependency to the AllControls .NET Core 3.1, .NET6.0 and .NET 7.0 NuGets.


  • Prevent exporting exactly the same fonts more than once.
  • A NullReferenceException is thrown when loading a document with no Encoding containing MicrosoftNonSymbolicGlyph.
  • TrueType Postscript fonts perceived as Standard fonts are embedded on export.
  • Some documents containing Type1 font without Private Dict are not rendered as expected.
  • A NullReferenceException is thrown when importing a document containing an updated xref table that has an invalid offset.
  • A KeyNotFoundException when getting glyph width with a standard font and WinAnsiEncoding.
  • InvalidOperationException is thrown when importing a document with an invalid offset of the cross-reference table.
  • An InvalidDataException 'Unknown compression method (0x31)' thrown when importing a document.
  • An InvalidCastException caused by colorspace defined as nested indirect objects.
  • Filled values in forms are missing when exporting to an image.
  • An exception is thrown when exporting an encoded document containing an image with Index ColorSpace.
  • An endless loop when importing a document containing an EI keyword not followed by space or return.


  • Resolving a conditional formatting rule for cells with a row index greater than the max causes an exception.
  • Importing documents containing many formulas referring to constant values is causing a memory leak.
  • Importing an XLS document containing _xlfn.SINGLE defined name causes an InvalidOperationException.
  • Horizontal bar chart data is loaded incorrectly in some documents.
  • Exporting a document containing workbook properties and protection leads to an invalid document.
  • A NullReferenceException is thrown when copying a sheet containing chart with Marker which FIll is null.
  • Text is cut off when exporting to PDF with a specific font.


  • KeyNotFoundException is thrown when iterating cells having a disabled 'Normal font' formatting option.


  • Introduced support for import of documents containing runs as children of another run.
  • Introduced support for importing documents containing simple fields as a child of another run.
  • HtmlFormatProvider: Handle import of base64 images with no data source.
  • When exported, a table cell with set borders is visualized with only top and bottom borders.
  • A table cell with a dark background is always exported with a white foreground.
  • PdfFormatProvider: ArgumentException because of negative line height.
  • HtmlFormatProvider: Wrong parsing of border styles when both are set inline and in CSS.
  • DOCX document fails to import if it contains content control without content inside the first block in the header or footer.
  • Document with a shape containing PictureFill fails to export to DOCX.

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