Hi,

I have a TreeView in a WebPanel. The height of the WebPanel is 600px.
The treeview is populated with nodes of an XML document.
I tried to select a certain Node with the following code:

node.ExpandPath();
node.Selected = true;
node.EnsureVisible();

But it does not work. The treeview is expanded, the node is selected, but not visible if it is too deep in the treeview structure.
How do I ensure the node is visible (so that it is visible within the 600px webpanel)?

Hi,

I still have some problems with the function EnsureVisible(). Based on your advice I made the code mentioned below:

<eo:TreeView ID="TreeViewDocumentExplorer" runat="server" OnItemClick="TreeViewDocumentExplorer_ItemClick1"
AutoExpandOnClick="False" ClientSideOnContextMenu="ShowContextMenu"
OnItemPopulate="TreeViewDocumentExplorer_ItemPopulate" Width = "350px" Height = "450px">
<LookNodes>
<eo:TreeNode ItemID="_Default" SelectedStyle-CssClass="DocumentExplorerTreeNodeSelected">
</eo:TreeNode>
</LookNodes>
</eo:TreeView>

I read on the forum that

node.Selected = true;
node.EnsureVisible();

should make the node visible, but that doesn’t work.
EnsureVisible() is used, but I can’t see the node selected. TreeView is scrolling to the highest element in the tree.

Hi,

I stil have the TreeView problem.
I created a new project with only a treeview with 5 nodes on my page.
The treeview has a fixed height and width. In Default.aspx.cs the 5th node is selected en EnsureVisible() is executed:

protected void Page_Load(object sender, EventArgs e)
{
EO.Web.TreeNode tn = this.TreeView1.Nodes[4];
tn.Selected = true;
tn.EnsureVisible();
}

But again the node is not visible. My code can be found on the following location:

http://www.amiran.nl/TestTreeview_.zip

Regards,

Amiran

Hello,

I have the same problem, can I urgently get the fix for this problem?

Hi,

You can find the test page here:
https://docs.google.com/leaf?id=0Bx8XBa5kqGszYzc2ZmJmNGMtMTlkMC00MGQ0LTkzNDktYjFjYzI4M2VhMDk5&hl=en&authkey=CPC158oJ
If you click the button, the page should select the "Recycle Bin" node, wich located at the bottom of the tree, which should be visible since I use ensurevisible. But it's not. Did I do it wrongly? Please help.

Hi,

I think I've solved my problem;
I omit TreeView1.ExpandAll() at the pageLoad then

in the button _click:
Protected Sub Button1_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim paths() As String = TextBox1.Text.Split("/")
Dim mypath As String = ""
Dim i As Integer
For i = 0 To paths.Length() - 1
mypath = mypath + "/" + paths(i)
TreeView1.FindItem(mypath).Expanded = True
Next

TreeView1.FindItem(mypath).Expanded = True
TreeView1.FindItem(mypath).Selected = True
TreeView1.SelectedNode.EnsureVisible()
End Sub

I still use loop to expand the tree. I don't want it to expanded at all the nodes, I only want to expand it at the specific nodes. And if I use TreeView1.FindItem(textbox1.text).Expanded = True, it won't expand at all. Is this a bug?

Thank you.