Here is my code


and my code-behind:



I have worked with this for over 8 hours and I think I am just not getting it ... can someone please just give me an example or help by fixing the code!

Here is what I want to accomplish...A user right clicks (context menu) on the tree view and selects, "Add Folder"
I just want to get that selected folders ItemID (or value or anything I can use to identify it)

No matter what I do - I am getting a "Object Not Found"

I have gone through all 7 pages of related questions ... and I went through the samples ... and the documentation ... have concluded that I am dumb! This seems straightforward and intuitive - but I cannot find an example that makes it work
:(

I really appreciate any help ... thanks

Got it... still having a problem:
1. I am using populate on demand...

2. When I create a node under my ItemID=0 (see .aspx "<eo:TreeNode Text="Pages" ItemID="0" Value="0,0,F"></eo:TreeNode>") getting the "nodeItem" (see Menu1_ItemClick event) works just fine.

3. When I attempt to create sub-nodes however getting the "nodeItem" throws the same exception (object not found).

4. Note that in both ("PopulateFirstLevel" and "GetSubNodes") - I am adding both a ".value" and a ".ItemID" (referring to the previous response).

Question: Why is that I am unable to retrieve the selected contextnode value from sub nodes but I am on their parents? and what do I need to do to get these values and stop throwing exceptions



Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not Page.IsPostBack Then
PopulateFirstLevel()
Else
SelectedNode = ViewState("SelectedNode")
SelectedOrder = ViewState("SelectedOrder")
SelectedType = ViewState("SelectedType")
End If
End Sub

Protected Sub Menu1_ItemClick(ByVal sender As Object, ByVal e As NavigationItemEventArgs)
Dim nodeItem As TreeNode = TreeView1.ContextNode 'Throws error for all subnodes
...

End Sub
Protected Sub TreeView1_ItemPopulate(ByVal sender As Object, ByVal e As EO.Web.NavigationItemEventArgs)

'Get the parent node
Dim parentNode As EO.Web.TreeNode = CType(e.NavigationItem, EO.Web.TreeNode)
GetSubNodes(parentNode)
End Sub

Private Sub GetSubNodes(ByVal ParentNode As TreeNode)
Dim n As MMS.Content.Nodes = New MMS.Content.Nodes(User.Identity.Name)
Dim dt As DataTable = Nothing
Dim ParentNodeID As Integer = 0

Try
ParentNodeID = CInt(ParentNode.ItemID)
Catch ex As Exception
End Try

If ParentNodeID > 0 Then
'NodeID, ParentNodeID, DisplayOrder, ItemName, ItemType
dt = n.getFolderData(MMS.Content.Nodes.ObjectType.Site, ParentNodeID)
For Each dr As DataRow In dt.Rows
Dim node As TreeNode = New TreeNode(dr(3))
node.ItemID = dr(0).ToString
node.Value = dr(0).ToString & "," & dr(2).ToString & "," + dr(4).ToString
If dr(4) = "P" Then
node.ImageUrl = "00030203"
node.PopulateOnDemand = False
Else
node.PopulateOnDemand = True
End If
ParentNode.SubGroup.Nodes.Add(node)
Next
ParentNode.ExpandPath()
End If
End Sub

Private Sub PopulateFirstLevel()
Dim n As MMS.Content.Nodes = New MMS.Content.Nodes(User.Identity.Name)
Dim dt As DataTable = Nothing

dt = n.getFolderData(MMS.Content.Nodes.ObjectType.Site)

'NodeID, ParentNodeID, DisplayOrder, ItemName, ItemType
For Each dr As DataRow In dt.Rows
Dim node As TreeNode = New TreeNode(dr(3))
node.ItemID = dr(0).ToString
node.Value = dr(0).ToString & "," & dr(2).ToString & "," + dr(4).ToString
If dr(4) = "P" Then
node.ImageUrl = "00030203"
node.PopulateOnDemand = False
Else
node.PopulateOnDemand = True
End If
TreeView1.TopGroup.Nodes(0).ChildNodes.Add(node)
Next
TreeView1.ExpandAll()
End Sub

.aspx code: everything between my form tags:

<script type="text/javascript">
function ShowContextMenu(e, treeView, node) {
var menu = eo_GetObject("<%=Menu1.ClientID%>");
eo_ShowContextMenu(e, "<%=Menu1.ClientID%>");
return true;
}
function ContextClicked(evt, eventInfo) {
eo_Callback('<%=callbackPanel.ClientID%>', eventInfo.getItem().getValue());
return true;
}
</script>
<eo:ScriptEvent ID="ScriptEvent1" runat="server"></eo:ScriptEvent>
<eo:CallbackPanel ID="callbackPanel" runat="server" Height="150px" Width="230px" OnExecute="treePanel_Execute">
<eo:TreeView ID="TreeView1" runat="server" Width="230px" ViewStateMode="Enabled" ControlSkinID="None" AutoWrap="True" AutoSelectSource="ItemClick" OnItemPopulate="TreeView1_ItemPopulate" ClientSideOnContextMenu="ShowContextMenu" RaisesServerEvent="true">
<LookNodes>
<eo:TreeNode ImageUrl="00030301" DisabledStyle-CssText="background-color:transparent;border-bottom-style:none;border-left-style:none;border-right-style:none;border-top-style:none;color:Gray;padding-bottom:1px;padding-left:1px;padding-right:1px;padding-top:1px;"
CollapsedImageUrl="00030301" ItemID="_Default" NormalStyle-CssText="PADDING-RIGHT: 1px; PADDING-LEFT: 1px; PADDING-BOTTOM: 1px; COLOR: black; BORDER-TOP-STYLE: none; PADDING-TOP: 1px; BORDER-RIGHT-STYLE: none; BORDER-LEFT-STYLE: none; BACKGROUND-COLOR: transparent; BORDER-BOTTOM-STYLE: none"
ExpandedImageUrl="00030302" SelectedStyle-CssText="background-color:#316ac5;border-bottom-color:#999999;border-bottom-style:solid;border-bottom-width:1px;border-left-color:#999999;border-left-style:solid;border-left-width:1px;border-right-color:#999999;border-right-style:solid;border-right-width:1px;border-top-color:#999999;border-top-style:solid;border-top-width:1px;color:White;padding-bottom:0px;padding-left:0px;padding-right:0px;padding-top:0px;"></eo:TreeNode>
</LookNodes>
<TopGroup Style-CssText="color:black;cursor:hand;font-family:Tahoma;font-size:8pt;padding-bottom:2px;padding-left:2px;padding-right:2px;padding-top:2px;">
<Nodes>
<eo:TreeNode Text="Pages" ItemID="0" Value="0,0,F"></eo:TreeNode>
</Nodes>
</TopGroup>
</eo:TreeView>
</eo:CallbackPanel>
<eo:ContextMenu id="Menu1" Width="144px" runat="server" ControlSkinID="None" RaisesServerEvent="true" OnItemClick="Menu1_ItemClick">
<TopGroup Style-CssText="cursor:hand;font-family:Verdana;font-size:11px;">
<Items>
<eo:MenuItem Text-Html="Add a Page"></eo:MenuItem>
<eo:MenuItem Text-Html="Add a Folder"></eo:MenuItem>
<eo:MenuItem Text-Html="Delete"></eo:MenuItem>
<eo:MenuItem IsSeparator="True"></eo:MenuItem>
<eo:MenuItem Text-Html="Properties"></eo:MenuItem>
</Items>
</TopGroup>
<LookItems>
<eo:MenuItem IsSeparator="True" ItemID="_Separator" NormalStyle-CssText="background-color:#E0E0E0;height:1px;width:1px;"></eo:MenuItem>
<eo:MenuItem HoverStyle-CssText="color:#F7B00A;padding-left:5px;padding-right:5px;" ItemID="_Default" NormalStyle-CssText="padding-left:5px;padding-right:5px;">
<SubMenu ExpandEffect-Type="GlideTopToBottom" Style-CssText="border-right: #e0e0e0 1px solid; padding-right: 3px; border-top: #e0e0e0 1px solid; padding-left: 3px; font-size: 12px; padding-bottom: 3px; border-left: #e0e0e0 1px solid; cursor: hand; color: #606060; padding-top: 3px; border-bottom: #e0e0e0 1px solid; font-family: arial; background-color: #f7f8f9" CollapseEffect-Type="GlideTopToBottom" OffsetX="3" ShadowDepth="0" OffsetY="-4" ItemSpacing="5"></SubMenu>
</eo:MenuItem>
</LookItems>
</eo:ContextMenu>

I am confused.

I just wanted a treeview that populates on demand.

The only objective I still have is to be able to right click on any node within my tree and be able to know what the ItemID is for that node.

Just so I am clear,
I have told you that this behavior works fine at the root node - but when I right-click on a sub-node (something beneath the "populate first level" - you are telling me that, by design, I have no way of getting that selected sub-node's ItemID?

Here is a link to a complete sample project that should completely illustrate the issue:
http://tinyurl.com/eoTreeView

Note, also there is a PDF "walkthrough" with screen shots that illustrates the behavior exactly.


Bill