TCallbackClientSide

TCallbackClientSide is used to specify client-side callback request options and client-side event handlers. Each active control that inherits from TActiveBaseCallbackControl has a ClientSide property. The ClientSide property is an instance TCallbackClientSide containing the actual options and event handlers that are used by the client-side when that control is making a callback request. The following example demonstrates the toggling of a "loading" indicator when the client-side is making a callback request.

<com:TClientScript PradoScripts="effects" /> Loading... <com:TActiveButton Text="Click Me" OnCallback="button_callback" ActiveControl.CallbackParameter="value" > <prop:ClientSide OnLoading="Element.show('callback_status')" OnComplete="Element.hide('callback_status')" /> </com:TActiveButton>

Events

The following client side events are executing in order if the callback request and response are send and received successfuly.

* Note that theses 2 events are not fired correctly by Opera. To make them work in this browser, Prado will fire them just after onPreDispatch.

In a general way, onUninitialized, onLoading, onLoaded and onInteractive events are not implemented consistently in all browsers. When cross browser compatibility is needed, it is best to avoid use them.
The OnSuccess and OnFailure events are raised when the response is returned. A successful request/response will raise OnSuccess event otherwise OnFailure will be raised.

Properties

The following properties can be used to change the way the callback request is performed.

$Id$