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 End-User Documentation

Callback Panel

The BootstrapCallbackPanel control represents a container area whose content can be updated using an AJAX-based callback technology. The collection of the Callback Panel's child controls can be accessed via the ASPxPanelContainerBase.Controls property.

The Callback Panel control implements a comprehensive client-side, and server-side functionality that enables updating its content on demand via callbacks. The client-side object model contains the client object for the Callback Panel control (BootstrapClientCallbackPanel), its method required to send a callback to the server (BootstrapClientCallbackPanel.PerformCallback), and methods allowing specific client operations to be performed when a callback sends to and comes from the server side (BootstrapClientCallbackPanel.BeginCallback and BootstrapClientCallbackPanel.EndCallback). Use the control's BootstrapCallbackPanel.ClientSideEvents property to assign a handler for the available client-side events. An instance of the BootstrapClientCallbackPanel object can be easily identified on the client by using the client programmatic identifier set via the ASPxPanelBase.ClientInstanceName property.

The required server-side processing of a callback sent from the client side by using the BootstrapClientCallbackPanel.PerformCallback method can be performed in a handler of the control's server-side BootstrapCallbackPanel.Callback event.

The code sample below demonstrates the use of the Bootstrap Callback Panel.

Expanded See Also

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