Hi,

i'm using the UltraWebTree Component (V. 9.1) with these Properties:

<ignav:UltraWebTree ID="wtLog" runat="server" OnDemandLoad="wtLog_DemandLoad"
LoadOnDemand="ManualSmartCallbacks" Height="297px" Indentation="20" TargetUrl=""
ImageDirectory="~/images/infragistics/" EnableViewState="true"
Width="163px" WebTreeTarget="ClassicTree" ExpandAnimation="None"
onnodeclicked="wtLog_NodeClicked" ExpandOnClick="True">
<ClientSideEvents NodeClick="wtLog_NodeClick" />
</ignav:UltraWebTree>

But when i perform any postback, all Nodes become collapsed.

On Page_Load i add some root nodes if !PostBack. OnDemandLoad i add folder nodes / file nodes.

Node newNode = new Node()
{
Text = GetShortLogFileName(file.Name),
ShowExpand = false,
DataPath = file.FullName,
ToolTip = file.Name,
Tag = "file",
ImageUrl = "~/images/730-list.gif"
};
nodes.Add(newNode);

via client side event wtLog_NodeClick i stop the node-click-postbacks when tag != "file"

<script type="text/javascript">
function wtLog_NodeClick(treeId, nodeId, button) {
var tree1 = igtree_getTreeById(treeId);
var Nodeclick = igtree_getNodeById(nodeId);

if (Nodeclick.getTag() != "file") {
tree1.CancelPostBack = true;
}
}
</script>

But the only thing what happen, when i click on a file node is: Page_Load, Page_Unload

wtLog_NodeClicked will not be called. And all nodes are gone after this postback.

Alle nodes are also gone, when i perform a postback via an other control e.g. a button. 

please help me with this issue.

regards.