Kentico Xperience 13 documentation and ASP.NET Core

Most documentation about running Xperience applications under ASP.NET Core can be found in a dedicated section: Developing Xperience applications using ASP.NET Core. The rest of the documentation still applies, but some code samples and scenarios might need slight modifications for Core projects.

All major differences between the MVC 5 and Core platforms are summarized in Migrating to ASP.NET Core.


Page builder development in ASP.NET Core

As a developer, you can enable content editors to create content on ASP.NET Core sites using the page builder. The page builder provides a user-friendly interface where non-technical users can manage content using configurable widgets prepared by developers. Users can also work with page templates to quickly create new pages based on predefined layouts.

The page builder should be used when you want to allow editors to create pages using modular components and experiment with their design and layout. To learn more about scenarios for which the page builder is suitable, see Choosing the format of page content.

Download and inspect the LearningKit project to see the implementation of various page builder components.

To start using the page builder:

  1. Enable the page builder feature
  2. Create pages with editable areas
  3. Implement and register widgets
  4. Implement and register sections (layouts for widgets)

Page builder components

The page builder framework consists of several components, which fit together in the following hierarchy. Additionally, widget zones can contain any number of widgets.

Editable areas

Editable areas are the top-level layout component and may contain any number of sections. You can learn how to add editable areas to a view on the Creating pages with editable areas in ASP.NET Core page.


Page sections specify the visual layout of widget zones. They represent reusable pieces of markup that can store an arbitrary number of widget zones – areas where content creators place widgets. Sections are fully customizable, and as a developer, you have absolute freedom in the way you set each section's layout. See Developing page builder sections in ASP.NET Core to learn how to implement and customize page sections.

Widget zones

Widget zones are components that allow content editors to insert widgets using the plus button. Widget zones are defined in the views of sections.


Widgets are reusable components that can be easily manipulated by content editors and other non-technical users. Widgets give non-technical users more power and flexibility when adjusting page content, in addition to basic editing of text and images. By working with widgets, users can decide which components are placed on pages and where. You can learn more about widget development and customization on the Developing page builder widgets in ASP.NET Core page. The default system widgets are listed on the Reference - System widgets page.

Aside from editable regions, the page builder allows you to use page templates.

Page templates

Page templates allow content editors to gain greater control over the layout of pages, without the need to ask a developer to modify the code in the MVC project. With templates, it is easy to switch between page layouts, so they are suitable for creating pages with a predesigned or repeating structure, such as landing pages. You can learn more about page template development and customization on the Developing page templates in ASP.NET Core page.

Enabling the page builder

To use the page builder, you need to enable it as a feature in your Core project.

  1. Open your ASP.NET Core project in Visual Studio.

  2. Enable the page builder feature by performing the following call in your application's startup class.

    Note: The features must be enabled before you register routes into the application's routing table. The Kentico().MapRoutes() method called within the UseEndpoints method adds required routes based on the set of enabled features.

    Application startup class
    using Kentico.Web.Mvc;
    using Kentico.Content.Web.Mvc;
    using Kentico.PageBuilder.Web.Mvc;
    public void ConfigureServices(IServiceCollection services)
    	services.AddKentico(features => 
    		// Enables the page builder feature
  3. (Optional) Edit the project's Views\_ViewImports.cshtml file (or a more specific file, depending on your requirements) and add a using statement for the Kentico.PageBuilder.Web.Mvc namespace (together with any other frequently used namespaces).

    • The namespace allows you to easily access page builder extension methods in the code of your views.
    • Alternatively, you can add using statements for the namespace directly in the code of individual views.

      @using Kentico.Web.Mvc
      @using Kentico.PageBuilder.Web.Mvc
    • Some extension methods from the page builder API are also provided as ASP.NET Core Tag Helpers. See Reference - Xperience Tag Helpers for details. You can include Tag Helpers in your _ViewImports.cshtml files using the @addTagHelper directive (in the same manner as adding using statements). This makes the included Tag Helpers available within all views that fall under the corresponding _ViewImports.cshtml file in the hierarchy. 

      @* Adds all Tag Helpers from the Kentico.Content.Web.Mvc assembly *@
      @addTagHelper *, Kentico.Content.Web.Mvc

The basic page builder feature is now enabled. You can prepare pages with editable areas in your Core project and start developing widgets and sections.

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