Telerik Reporting

Release History

Progress® Telerik® Reporting R1 2020 SP1 (

February 19, 2020

Add WebServiceDataSource Timeout property

  • The property enables control over web request duration.

Support cookie-based two-factor authentication in WebServiceDataSource

  • Add support for web services utilizing cookie-based two-factor authentication, including OpenEdge application server.

Add version to the web viewers and designer resources requests

  • This will reduce the chances for using old resources and enable better resources cache for already available resources

What's Improved

  • Add a parameter to Round() built-in math function that specifies the number of fractional digits used for rounding


  • Instantiating reports in multiple threads might throw an exception

Web Service Data Source

  • In design time the data is requested from the service when both inline JSON and service URL are set

Desktop Designers

  • LineType changes only in Preview Mode
  • Renaming calculated field to the name of deleted field throws error

Standalone Report Designer

  • Adding reports with spaces in the name breaks the Report Book

Visual Studio Designer

  • Upgrade Wizard is not starting in VS 2010

Web Designer

  • Adding the WebReportDesigner service throws error when running in a .NET Core 3.1 app
  • An error occured while loading the data schema for WebServiceDataSourceName JSON.parse: unexpected character at line 1 column 1
  • Changes to the DataSource property of a data item are not saved in the report definition
  • Context menu items contain incorrect "Edit" entry when the selection is changed through the design surface
  • DataSource schema is not cleared when the connection string or another relevant field is reset
  • Delete command on Style sheet from Explorer tree does not work
  • Graph's axis misses CrossAxisPositions editor
  • Report parameter cannot be deleted from Explorer
  • ReportParameter.AvailableValues.DataSource is not set correctly
  • Setting DataSource to none corrupts the report definition
  • The SQL DataSource Wizard does not skip the parameters pages when no SQL parameter is needed
  • WebServiceDataSource properties are not saved correctly
  • An error appears in the console when the SQL DS wizard finishes
  • Crosstab wizard closing animation lags
  • Expression editor does not insert the selected value on the cursor position
  • Multiselect of explorer tab doesn't work in IE11
  • Multi-selection can't be deselected
  • Removing DataSource doesn't reset the data item DataSource property
  • The SQL DataSource Wizard's Preview page does not clearly notify the user if no data is retrieved upon command execution


  • Dev example projects refer to Trial NuGet packages
  • Telerik.Reporting.OpenXmlRendering is missing dependency to DocumentFormat.OpenXml
  • Telerik.Reporting.Services.AspNetCore NuGet is missing dependency to Microsoft.AspNetCore.Mvc.NewtonsoftJson


  • An error occurs when rendering report with cacheDefinitionProperties turned off
  • Report renders too many pages in Linux or Mac


  • A NullReferenceException might be thrown when reports are simultaneously rendered in multiple threads
  • Boolean Report Parameter value not updated when evaluated from another parameter
  • PaperSize Custom doesn't calculate the height correctly
  • When a symbol is not supported by the Encoder of a Barcode item a non-informative error is thrown

CSV Rendering

  • Rendering a report with Choropleth item causes an error

HTML Rendering

  • When exporting report containing images to HTML or HTML5, the image files referred in the html lack extensions

PDF Rendering

  • Fonts are not embedded correctly when the report is rendered in PDF in Mac OS

Word Rendering

  • TOC doesn't appear when exported with ReportProcessor


  • File Cache of the reporting engine is not cleaned by the REST Service

HTML5 Report Viewer

  • The /api/reports/formats request does not respect the authenticationToken value
  • The Print button doesn't invoke print dialog in Chromium Edge
  • When ReportsController is authorized and User is NOT logged in the viewer displays "loading report..." instead of an error

Web Forms HTML5 Report Viewer

  • Failed requests due to incorrect paths to Kendo font

Product Dependencies

Telerik Reporting
- Microsoft .NET Framework 4
- .NET Standard 2.0
- .NET Core 3.0

- Microsoft.AnalysisServices.AdomdClient ( or later)

HTML5 Report Viewer
- Telerik Kendo UI (2015.3.1111 or later)
- jQuery (1.9.1 or higher if required by Kendo)

ASP.NET WebAPI REST Report Service
- Microsoft ASP.NET Web API (4.0.20710.0 or later) - Newtonsoft.Json (9.0.1 or later)

ServiceStack REST Report Service
- ServiceStack (

ASP.NET MVC Extension of the HTML5 Report Viewer
- Microsoft ASP.NET MVC Framework (4.0.20710.0 or later)

WPF Report Viewer for .NET Core
- Telerik UI Controls for WPF (2020.1.218.310) targeting .NET Core 3.1

WPF Report Viewer
- Telerik UI Controls for WPF (2020.1.218.40)

Silverlight Report Viewer
- Telerik UI Controls for Silverlight (2020.1.218.1050)

Database cache ICache implementation
- Telerik Data Access ORM (2015.1.220.1)

.NET Core Reporting Engine
- SQLitePCLRaw.bundle_green (2.0.1 or later)

Telerik Reporting

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