Tree View

[rpradeepa]

Hi,

I designed one treeview in asp.net

my treeview looks like

-level1
- A
- B
-level2
- C
- D

At startup I only see the root levels
- level 1
- level 2

I expand level 1 and click level2
then a postback is generated and the tree is rebuilt. This is a problem
because after the postback the state of the tree is forgotton.
Meaning it is back to
- level 1
- level 2

instead of
-level1
- A
- B
-level2


I want a way for the treeview to remember which nodes should be expanded and not.. All this
is forgotten when I rebulid my tree.

Anyone know how to fix this?

[DrBunchman]

It should maintain it's state across postbacks.

Can you print the aspx code for your tree and the .vb/c# code you're using to build the tree please.

Dr B

[rpradeepa]

 
 Private Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs)
new_dbconn1.ConnectionString = ConfigurationManager.ConnectionStrings("database name").ConnectionString
AMenu.Access_Menu(Session("form")) 
If Not IsPostBack Then
PopulateRootLevel()
MyTree.CollapseAll()
End If
_titleiconimageurl = "~/images/menuicon.jpg"
End Sub
 
<asp:TreeView ID="MyTree" runat="server" OnTreeNodePopulate="MyTree_TreeNodePopulate" CollapseImageToolTip="" ExpandImageToolTip="" NodeStyle-ForeColor="DarkBlue"
SkinID ="MSDN" > 
</asp:TreeView>
 

[DrBunchman]

If you put a breakpoint on the MyTree.CollapseAll() line in your Page_Load Sub does it hit this when you do a postback?

Do you invoke the CollapseAll() method anywhere else in your code which could be causing this?

Dr B

PS Please remember to surround all code in your posts with code tags using the # button at the top of the editor window - it makes your posts much easier to read. Thanks.