How to expand only the selected node in treeview control?

Deepa Sudhir

I have a treeview control. By default the treeview expands and shows all its child nodes. I need to show only the node that is selected.

14 Replies

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Vishnu Bhangale11y ago
try this http://cssmenumaker.com/menu/elegant-accordion-menu
Khargesh Rajput11y ago
not sure but you can try
http://www.dotnetsharepoint.com/2014/04/click-node-text-to-expandcollapse.html

http://forums.asp.net/t/1194490.aspx?Treeview+Navigation+Expand+and+Collapse+on+Node+click
Deepa Sudhir11y ago
It sure did work when the nodes are clicked. Thank you for guiding me...But i realized that it doesn't work when the text in the node is clicked. How to solve that? When the text is clicked, the topmost parent and child expands
Khargesh Rajput11y ago
on page load wriite to collapse

or visit link
http://www.dotnetcurry.com/showarticle.aspx?ID=257
Deepa Sudhir11y ago
I am using the DataSourceID="SiteMapDataSource1" so where do i specify TreeViewArtMaterial.CollapseAll();
Khargesh Rajput11y ago
no property to be add
but after bind treeview
try once
TreeViewArtMaterial.CollapseAll();

and below link may help you
http://www.dotnetcurry.com/showarticle.aspx?ID=257
Deepa Sudhir11y ago
width="250px" OnTreeNodeExpanded=" TreeViewArtMaterial_TreeNodeExpanded" >

Is there any other property to be set here?
Khargesh Rajput11y ago
protected void TreeView1_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
{
if (e.Node.Parent == null)
return;
string strNodeValue = e.Node.Value;
foreach (TreeNode node in e.Node.Parent.ChildNodes)
{
if (node.Value != strNodeValue)
node.Collapse();
}
}

working fine for me
Deepa Sudhir11y ago
I tried this. But when a new parent node is clicked the topmost parent node and child nodes expand without the current node being expanded.
It works fine only for the first node and its children.
Khargesh Rajput11y ago
write on treenode_expanded event

protected void TreeView1_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
    {
        if (e.Node.Parent == null)
            return;
        string strNodeValue = e.Node.Value;
        foreach (TreeNode node in e.Node.Parent.ChildNodes)
        {
            if (node.Value != strNodeValue)
                node.Collapse();
        }

    }
Deepa Sudhir11y ago
I am implementing the treeview along with sitemappath taking values from sitemap in a master page. By default all the treeview nodes are expanded which i don't need. Only the selected nodes have to be expanded.
Deepa Sudhir11y ago
Accordion menu can have only one submenu, right? I have another submenu inside the submenu. will Accordion help?
Khargesh Rajput11y ago
i think accordion menu is better then treeview to expand only selected node to be open at a time
see demo with source code.
http://www.dynamicdrive.com/dynamicindex17/ddaccordionmenu-bullet.htm

http://www.dynamicdrive.com/dynamicindex17/ddaccordionmenu.htm
Manish Kumar Choudhary11y ago
Go through following articles it will help you

http://stackoverflow.com/questions/14596723/how-can-i-get-all-expanded-nodes-in-treeview

https://msdn.microsoft.com/en-us/library/system.windows.forms.treeview.checkboxes%28v=vs.110%29.aspx

http://www.codeproject.com/Questions/196856/C-NET-Treeview-Node-Checked