demos/quickstart/protected/pages/ActiveControls/Callback.page


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<com:TContent ID="body" >

<h1 id="188005">TCallback</h1>
<com:DocLink ClassPath="System.Web.UI.ActiveControls.TCallback" />

<p class="block-content">
<tt>TCallback</tt> provides a basic callback handler that can be invoked from the
client side by using the javascript ojbect obtained from the
<tt>ActiveControl.Javascript</tt> property.
You can set the <tt>CallbackParameter</tt> property from javascript directly on
the object returned by <tt>ActiveControl.Javascript</tt>.
Once you are ready, you can call the <tt>dispatch()<tt> method on the object to
execute the callback.
The server-side event <tt>OnCallback</tt> is raised when a callback is requested made.
</p>

<p class="block-content">
Example usage:
</p>
<com:TTextHighlighter Language="text" CssClass="source block-content" >
&lt;com:TCallback ID="callback1" OnCallback="callback1_Requested" /&gt;
&lt;script type="text/javascript"&gt;
  function do_callback1()
  {
    var request = &lt;%= $this->callback1->ActiveControl->Javascript %&gt;;
    request.dispatch();
  }
&lt;/script&gt;
&lt;div onclick="do_callback1()">Click Me!&lt;/div&gt;
</com:TTextHighlighter>

<com:RunBar PagePath="ActiveControls.Samples.TCallback.Home" />

<div class="last-modified">$Id$</div></com:TContent>