Telerik UI for ASP.NET AJAX

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Telerik UI for ASP.NET AJAX

Release History

UI for ASP.NET AJAX R3 2017 (version 2017.3.913)

September 12, 2017


  • NullReferenceException in RadScriptManager and RadStyleSheetManager from Telerik.Web.UI.CryptoService.GetService()


  • Improved Accessibility


  • Information about the signing date is added in 'Signature Validation Status' dialog.
  • Different exceptions can be thrown when creating documents in multiple threads simultaneously.
  • A color is not imported correctly when the color component of an RGB color space is outside of allowed ranges.
  • UriFormatException is thrown when importing Action without the HTTP prefix.
  • InvalidCastException is thrown by PdfFormatProvider when importing CID font widths array containing real width values.
  • Field values are not visible in Adobe Reader when "Show border hover color for fields" setting is selected.


  • Exposed WorksheetUIUpdateContextBase.GetDataValidationRuleResult(CellIndex) public method, useful for creating custom data validation layers.
  • Added support for the VLOOKUP and HLOOKUP functions.
  • Added support for MATCH function.
  • Added support for the DAYS function.
  • Wrong exception messages are constructed sometimes, due to problem in the internal guard methods.
    • Guard.ThrowExceptionIfTrue now throws InvalidOperationException with text " should be false.
    • Guard.ThrowExceptionIfFalse now throws InvalidOperationException with text " should be true.
  • Characters different than digits or letters entered in Formulabar are not visible in Expression_Dark, VisualStudio2013 dark and Green dark themes.
  • InvalidOperationException is sometimes thrown when exporting to XLSX format in multi-threaded scenario.
  • Updated the default values of first three FormulaSelectionColors to be visible in Expression_Dark, Green and VisualStudio2013 Dark themes.


  • Added IWorkbookExporter.GetSheetInfos() method for accessing the names of the sheets within the workbook.
  • Default encoding of CSV documents changed to UTF8 with BOM, so you can easily work with special characters like Umlauts.


  • Getting actual style property value is evaluating Normal style last when a paragraph without explicitly assigned style is in a table.
  • RtfFormatProvider: Non-breaking spaces declared with control word are missing after import.

Telerik UI for ASP.NET AJAX

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