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The Q2 2015 update of Telerik UI for ASP.NET AJAX is one of our strongest releases yet. Allow me to list the most important additions and explain the benefits.

Mobile Support and Responsive Web Capabilities

The mobile capabilities of UI for ASP.NET AJAX, RenderMode="Mobile," introduce the following:

Web Forms Mobile Editor

The new mobile rendering of RadEditor offers exceptional usability not only on smartphones but on tablets, influenced by the leading native rich text editors, Microsoft Word Mobile and Google Docs Mobile. The UI, specially designed for small screens, is easy for touch, with bigger buttons, touch-friendly dropdowns and dialogs. All popular tools, including formatting-related buttons, color pickers, image, hyperlink and table managers are improved for optimal experience in mobile browsers:

Mobile WYSIWYG Editor
Figure 1: The Telerik UI for ASP.NET AJAX Mobile

Mobile Capabilities in the Image Gallery, TreeList and DataPager

To turn on these new features, all you need to do is set the RenderMode property of the three controls to Mobile. This setting will force their responsive capabilities, and you can deliver mobile-friendly UI and gestures that will significantly facilitate user experience (UX) in mobile browsers. You can see below how responsive rendering of the three controls changes on different resolutions/devices:

Mobile Image Gallery

Figure 2: A sample mobile gallery.


Mobile TreeList
Figure 3: A mobile TreeList.


Mobile Data Pager


Figure 4: Mobile Data Pager.

Modern Lightweight Rendering

Thanks to the introduction of modern rendering in the Input Manager, Notification, Progress Area, Ribbonbar, Scheduler, TabStrip and ToolBar, we managed to reduce footprints and significantly facilitate customization of their Skins. All you need to do to enable the new rendering is to set RenderMode=”Lightweight.”

Toolbar 3D Lightweight vs Classic Rendering
Figure 5: Modern (Lightweight) Rendering.


We know how important rendering modernization and easy skin creation and customization is for your development. Our goal is to provide lightweight rendering for all controls until the Q3 2015 release. You can check our current level of progress in this help article.

Stability Improvements Across all Controls

Stability is a major factor for each of our projects. We take it seriously and put in extra effort to reduce the known issues in our bug-tracking system to the best possible minimum. Our work in this area has given us good results, and by the end of 2015, I’m sure we’ll have a far more stable UI for ASP.NET AJAX suite. I invite you to actively use the Feedback portal to vote for the issues you find most critical. This will help us to sift them out, raise their priority and fix them first.

RadDiagram becomes official

The RadDiagram control is not only pretty stable, but also features the base functionality for a diagramming tool, so it’s time to remove the beta tag from it. You can give it a spin and see its full potential in the Diagramming sample app.

Exciting New Features in a Number of Controls

New RadGrid Features in Telerik UI for ASP.NET AJAX in Q2 2015

By default, group aggregates are calculated only for the currently loaded records on the selected page view. With the new release, RadGrid provides a long anticipated feature to visualize information from all pages when calculating group aggregates.

Drag and Drop File Editor

A new nice ability to drag and drop files over the FileBrowser dialogs and to upload them is added.

Improved HtmlChart Visualizations

Everyone who loves to customize the appearance of the control will find the new charting ability quite useful for implementing custom visualizations for legend items, axis titles, labels, markers and series. A live demo is available for test.

Client Export Manager

A newly introduced functionality in the control will allow you to split the exported PDF content into different pages.

Appearance Improvements and Better Bootstrap Support

Less than a month after the Q2 2015 release, you can expect the appearance of our new Theme Builder tool that will offer even more capabilities, including the ability to:

  • Create and edit skins for modern rendering (lightweight and mobile).
  • Import a custom Bootstrap theme and apply its specific color information to the built-in Telerik Bootstrap skin.

Q2 Release of Telerik UI for ASP.NET AJAX Resources

Release Webinar - Sign Up Here

About the Author

Rumen Jekov

Rumen Jekov (@Rumen_Jekov) started his career at Telerik’s ASP.NET team in 2004 as a tech support engineer and passed through the position of a team lead to a product manager. He has answered more than 51,500 tickets helping customers to achieve their goals. Presently, he is a product owner of Telerik UI for ASP.NET AJAX and a manager of the AJAX crew at Progress. Off work, he enjoys traveling across the globe, watching movies and tech shows, reading books and listening to podcasts.

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