treeview expand depth 2 collapse to depth level 0.

I have treeview on update panel and loading folders based on user interaction. It works for depth level 2 but at this point clicking the node shows depth level 0 results. is there something I am missing?

here are few lines of crap...

Thanks for you help.

<asp:TreeViewid="SourceTreeView"runat="server"Width="100%"OnSelectedNodeChanged="SourceTreeView_SelectedNodeChanged"OnTreeNodeExpanded="SourceTreeView_TreeNodeExpanded"ShowCheckBoxes="Leaf"ImageSet="Simple"Height="100%"ExpandDepth="1"MaxDataBindDepth="10"NodeIndent="15">

<ParentNodeStyleFont-Bold="False"></ParentNodeStyle>

<HoverNodeStyleForeColor="#5555DD"Font-Underline="True"></HoverNodeStyle>

<SelectedNodeStyleHorizontalPadding="0px"ForeColor="#5555DD"VerticalPadding="0px"Font-Underline="True"></SelectedNodeStyle>

<NodeStyleNodeSpacing="0px"HorizontalPadding="0px"ForeColor="Black"VerticalPadding="0px"Font-Size="10pt"Font-Names="Tahoma"></NodeStyle>

</asp:TreeView>

I am adding nodes per users request using following code, which is same for depth 0,1 and 2.

newNode.Expanded =false;

newNode.ShowCheckBox =false;

newNode.PopulateOnDemand =true;newNode.SelectAction =TreeNodeSelectAction.Select;

treeNode.ChildNodes.Add(newNode);

sg20000:

is there something I am missing

You are missing, that the treeview is not supported in the updatepanel

Check here:

UpdatePanel Control Overview

Maybe you are right and thanks for your help.

I found at some places forward slash was being used, i fixed that and while trying to make it work, made some other changes to node before adding to tree and seems like it is working. I think some nodes had / (creating some escape sequences) or something else to trigger wrapping of tree.

is that treeview on update panel will behave unpredictablly or there are some other issues?

sg20000:

is that treeview on update panel will behave unpredictablly or there are some other issues?

I'm also using treeview with updatepanel, regardless is it not supported.

Main issue which I found that the tree state (selected node, expanded/collapsed nodes state etc.) stays out sync when a postback occurs. Especially when you use any client side capability (populate on demand, enableclientscript=true).

For example:

- Treeview in up

- User coll/exp nodes (no postback yet)

- User select a node, partial postback, selectednodechanged handled for example.

- User select a different node, same as before, but coll/exp state messed up.

- etc.

Without client script features it's ok in up, but slow (big complicated markup, big viewstate etc.)