Web parts represent a block of content or combination of content and functionality. They are the basic building blocks of portal engine page templates. Using existing web parts, users with the appropriate permissions can build or modify the structure of pages directly from a browser by using the CMS Desk -> Content -> Edit -> Design interface. All web parts must be placed into web part zones.

 

A web part is a user control (ASCX) that inherits from the CMSPortalControls.CMSAbstractWebPart class. You can easily create your own web parts using Visual Studio or Visual Web Developer Express Edition and use them to add your custom .NET code onto the pages of the website.

 

For complete documentation of all web parts and their properties, please see the Kentico CMS Web Parts reference.

 

Web parts can be managed in Site Manager -> Development -> Web parts. Each web part has the following properties on the General tab:

 

•Display name - the name of the web part displayed in the administration interface.

•Code name - the name of the web part used in website code.

•Category - here you can choose the category in the web part catalog where the web part will be placed.

•Type - the type of the web part. The following web part types are available:

•Standard - typical web parts displaying some content.

•Data source - do not display any content, only provide data to be displayed by a connected web part.

•Filter - can be connected to a data source and enables users to limit the data provided by it.

•Placeholder - used for the General -> Layout -> Page placeholder web part, which specifies an area where the content of sub-pages should be displayed.

•Invisible - are not displayed on the page at all and usually perform some type of background task.

•Basic - basic web parts without partial caching and AJAX UpdatePanel support.

•Widget only - these web parts are only intended to serve as base templates for widgets and are not available in the web part catalog.

•File name - contains the relative path to the user control that implements the web part. The path starts from the CMSWebParts folder. It is recommended to organize the web parts on the disk in the same way as in the categories. Example: Search/cmscompletesearchdialog.ascx

•Description - a text description of the web part that will be displayed in the web part catalog.

•Thumbnail - the image used in the web part catalog.

 

 

On the Properties tab, you can define the web part properties and how they appear in the Web part properties configuration dialog.

 

Each web part has the following default properties. These properties are loaded automatically when the web part is defined and their default values can be specified on the System properties tab. If you wish to modify more than the default value of one of these properties, such as its behaviour and attributes (e.g. for it not to be displayed in the web part configuration dialog) you can do so by adding and configuring it on the Properties tab.

 

Default

 

•Web part control ID - serves as an identifier for the web part. This ID must be unique within the context of each page template. The value of this property may only contain alphanumeric characters and the underscore character ( _ ).

•Web part title - title of the web part displayed on the Design tab of CMS Desk. If empty, the value of the Web part control ID property is used for this purpose.

•Disable view state - indicates if view state should be disabled for the web part.

•Disable macros - if checked, macros contained in the values of the web part's properties will no longer be resolved.

 

Visibility

 

•Visible - indicates if the web part should be displayed.

•Hide on subpages - indicates if the web part should be hidden on sub-pages. If checked, the web part will not be displayed on documents that inherit the web part from a parent document.

•Show for document types - contains a list of document types on which the web part should be displayed. If the currently selected document uses the page template containing the web part, but its type is not specified by this property, the web part will be hidden. The document types in the list must be specified by their code names and separated by semicolons (;). If empty, the web part will be displayed on all document types.

•Display to roles - contains a list of roles to which the web part should be displayed. This may be used to implement documents with specific functionality for different types of users. The roles in the list must be specified by their code names and separated by semicolons (;). If empty, the web part will be displayed to all users.

 

Web part container

 

•Web part container - specifies the name of the container (box) to be displayed around the web part. Only the containers defined at Site Manager -> Development -> Web part containers can be selected. The selected container can be edited directly by using the Edit button.

•Container title - sets a title for the container (if one is specified for the web part). This title is displayed only if the {%ContainerTitle%} macro is used in the code of the container.

•Container CSS class - CSS class used for the web part's container. Applied only if the {%ContainerCSSClass%} macro is used as the value of the Class attribute in the code of the container.

•Container custom content - custom content to be displayed in the web part's container. Applied only if the {%ContainerCustomContent%} macro is used in the code of the container.

 

HTML Envelope

 

•Content before - HTML content placed before the web part. Can be used to display a header or add some encapsulating code, such as <div> or <table> elements to achieve the required layout.

•Content after - HTML content placed after the web part. Can be used to display a footer or close the tags contained in the ContentBefore value, such as </div> or </table> elements.

 

AJAX

 

•Use update panel - indicates if an AJAX UpdatePanel container should be used for the web part.

 

Time zones

 

•Time zone - specifies the type of time zone used for the content of the web part. The following types are available:

•Inherit - inherits the time zone settings from the Page placeholder web part used to display the page template containing this web part (typically the one on the master page).

•Server - server time zone settings will be used by the web part.

•Web site - website time zone settings will be used by the web part.

•User - time zone settings of individual users will be used by the web part.

•Custom - some other time zone will be used based on the selection done in the Custom time zone property.

•Custom time zone - may be used to assign a custom custom time zone specifically for the content of this web part. If selected, the time zone will be used regardless of current user or website time zone settings.

 

Partial caching

 

•Partial cache minutes - sets the number of minutes for which the output HTML code of the web part should remain cached. This process is similar to full‑page caching, but only for the code of the web part specifically. If left empty or set to 0, partial caching will be not be used for the web part.

•Partial cache dependencies - contains a list of cache keys on which the partial cache of the web part depends. When the specified cache items change, the partial cache of the web part is deleted. Each line may only contain a single item. If the Use default cache dependencies box is checked, the default dependencies will be used, which include all possible object changes that could affect the specific web part.

 

The structure of a web part, its content before/after sections and its container is the following: