Dock and Modal Popups - Docking AJAX

The DockPanel extension has the capability to load panel content on demand via callbacks. Several content loading modes are available via the following settings of the LoadContentViaCallback property.

  • None - The content is always (initially) rendered inside a dock panel (the default behavior).
  • OnPageLoad - Loading of panel contents starts immediately after an entire page has been loaded.
  • OnFirstShow - Loading of panel contents starts when a dock panel is invoked for the first time.
  • OnDock - Loading of panel contents starts every time a panel has been docked to a dock zone.
  • OnDockStateChange - Loading of panel contents starts every time a panel's dock state has been changed (that is a docked panel starts floating or a floated panel docks to a zone).
  • OnFloating - Loading of panel contents starts every time a panel has been made floated.

Using a delayed load of panel contents, you can enhance the response time of your web page on its initial load. You can also update the content of a dock panel programmatically on demand.

Note that in this example, we purposely pause callback processing on the server side for half a second in order to make the loading panel visible during this time.

Version: v2017 vol 1.7
Copyright © 2006-2017 Developer Express Inc
Your Next Great MVC App Starts Here

Get started today and download your 30-day trial of DevExpress MVC Extensions (includes 30 days of free technical support).

All demos ship with full source code and are included in the DevExpress MVC distribution. Refer to the Demos and Sample Applications topic to learn more.

DevExpress MVC Extensions ship as part of DevExpress Universal, DXperience and ASP.NET Subscriptions and are backed by a 60 day unconditional money-back guarantee.
To learn more and obtain pricing information, visit the Compare Features and Pricing webpage. For immediate assistance, contact us by Email at or by phone at +1 (818) 844-3383 between 7:30am and 4:30pm Pacific Time.