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TreeView OnTreeNodeCheckChanged problem

Posted on 2008-06-12
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Last Modified: 2013-11-26
I have a problem, it's something that shouldn't happen, I have a treeview with a bunch of branches, I have added the OnTreeNodeCheckChanged event to the tree, when that happens it will Check or UnCheck all the Child nodes, when I click on the CheckBox nothing happens, but when I select the node I just changed the event gets fired, Shouldn't the OnSelectedNodeChanged be fired by a change in Selection? Why is it not firing with my Check Change?

Please help.

Thanks,
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Question by:victorbello
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Accepted Solution

by:
Dustin Hopkins earned 2000 total points
ID: 21776526
It is calling the event, but that event doesn't cause a post back and won't reload the control, which selected node change does do. So a work around is to use javascript to call the postback. Like this:
add the onclick event to your treeview:
<asp:TreeView ID="TreeView1" onClick="javascript:postbackOnCheck(event);" runat="server"  ShowCheckBoxes="All">

Then add this javascript function:

 <script type="text/javascript" language="javascript">
 
function postbackOnCheck(e) 
{ 
var isNav = (window.navigator.appName.toLowerCase().indexOf("netscape")>=0); 
var o; 
if (isNav && e != null) 
o = e.target; 
else 
o = window.event.srcElement; 
if (o.tagName == 'INPUT' && o.type == 'checkbox' 
&& o.name != null && o.name.indexOf('CheckBox') > -1) 
__doPostBack("",""); 
} 
</script>

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