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TreeView checkboxes AutoPostBack with AJAX

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There is a known problem with TreeView checkboxes in ASP.NET: they can't do AutoPostBack. So I've solved this problem like this:

<script language="javas cript" type="text/javascript">

function postbackOnCheck ()
var o = window.event.sr cElement;
if (o.tagName == 'INPUT' && o.type == 'checkbox' &&
o.name != null && o.name.indexOf( 'CheckBox') > -1)
__doPostBack("" ,"");


<asp:TreeView onclick="postba ckOnCheck()" ID="treeContent "
runat="server"> ... And so on ... </TreeView> This way I get full postback each time the user checks\unchecks the checkbox.

But now I want to modify this code in order to make use of AJAX: I don't want the FULL postback, but I only want the tree itself to be updated. Of course, I've started by placing it inside the UpdatePanel. But what now? Can somebody help me with this issue?
Mar 20 '07 #1
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