Hi,

I'm working on webdatatree with a simple postback onselectionchaged as below

protected void WebDataTree1_OnSelectionChanged(object sender, Infragistics.Web.UI.NavigationControls.DataTreeSelectionEventArgs

e)

{

Label1.Text = e.NewSelectedNodes[0].Value;

//WebDataTree1.Visible = false;

}

it seem to work at first but as i load more nodes (more than 800) into the tree i got this error:

[InvalidOperationException: Operation is not valid due to the current state of the object.]
   System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeDictionary(Int32 depth) +580240
   System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +155
   System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeList(Int32 depth) +141
   System.Web.Script.Serialization.JavaScriptObjectDeserializer.DeserializeInternal(Int32 depth) +231
   System.Web.Script.Serialization.JavaScriptObjectDeserializer.BasicDeserialize(String input, Int32 depthLimit, JavaScriptSerializer serializer) +80
   System.Web.Script.Serialization.JavaScriptSerializer.Deserialize(JavaScriptSerializer serializer, String input, Type type, Int32 depthLimit) +44
   System.Web.Script.Serialization.JavaScriptSerializer.DeserializeObject(String input) +13
   Infragistics.Web.UI.Framework.ObjectBase.LoadCollectionsStateFromViewState() +182
   Infragistics.Web.UI.Framework.RunBot.HandleLoadViewState() +60
   Infragistics.Web.UI.Framework.Data.HierarchicalDataBoundControlMain.LoadViewState(Object savedState) +422
   Infragistics.Web.UI.NavigationControls.NavControl.LoadViewState(Object savedState) +194
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +187
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +148
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +225
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +148
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +225
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +148
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +225
   System.Web.UI.Control.LoadChildViewStateByIndex(ArrayList childState) +148
   System.Web.UI.Control.LoadViewStateRecursive(Object savedState) +225
   System.Web.UI.Page.LoadAllState() +312
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +747

I tried changing the width and height does not seem to work. the tree load fine but when i click on the node i got the error as above

thank in advance.

Zaid