How to expand a selected treeview node

How to expand a selected treeview node

By : Debashis
Date : November 22 2020, 11:12 AM
around this issue I just coded as below to expand a selected node after a postback. But it is not working. What am I missing? , If I'm correct method FindNode definition is:
code :
public TreeNode FindNode(
string valuePath)

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WPF Treeview Expand only a first node and selected item?

WPF Treeview Expand only a first node and selected item?

By : user3108434
Date : March 29 2020, 07:55 AM
I wish did fix the issue.
I have different object type to bind and use ViewModel will be to painfull... IMO
Expand selected node after refresh TreeView in C#

Expand selected node after refresh TreeView in C#

By : user3826537
Date : March 29 2020, 07:55 AM
will help you I'm using this with a WinForms TreeView. It saves the nodes expanded state between refreshes:
code :
// Save the path of the expanded tree branches
var savedExpansionState = treeView1.Nodes.GetExpansionState();


// TreeView is populated
// ...

// Once it is populated, we need to restore expanded nodes

public static class TreeViewExtensions
    public static List<string> GetExpansionState(this TreeNodeCollection nodes)
        return nodes.Descendants()
                    .Where(n => n.IsExpanded)
                    .Select(n => n.FullPath)

    public static void SetExpansionState(this TreeNodeCollection nodes, List<string> savedExpansionState)
        foreach (var node in nodes.Descendants()
                                  .Where(n => savedExpansionState.Contains(n.FullPath)))

    public static IEnumerable<TreeNode> Descendants(this TreeNodeCollection c)
        foreach (var node in c.OfType<TreeNode>())
            yield return node;

            foreach (var child in node.Nodes.Descendants())
                yield return child;
How do I expand a node (parent node) in an ASP.NET Dynamic TreeView Control upon click of the text of the node?

How do I expand a node (parent node) in an ASP.NET Dynamic TreeView Control upon click of the text of the node?

By : reymon payat
Date : March 29 2020, 07:55 AM
wish help you to fix your issue Sorry forgot getting back to this. I messed around using the built in "TreeView_ToggleNode" javascript function, that gets rendered along with the TreeView Control. Got exactly what I needed.
how to expand the parent nodes of a selected child node on kendo treeview

how to expand the parent nodes of a selected child node on kendo treeview

By : Torben Lajer
Date : March 29 2020, 07:55 AM
Hope this helps If you want to click all ancestors of items which id are in data, add the following lines of code:
code :
var ancestors = $(node).parents("li[role='treeitem']");
$(">div>span>input", ancestors).click();
  data.forEach(function (entry) {
      var treeView = $("#treeview").data('kendoTreeView');
      var dataSource = treeView.dataSource;
      var dataItem = dataSource.get(entry);
      var node = treeView.findByUid(dataItem.uid);
      var checkbox = $("input[type='checkbox']", node)[0];
      var ancestors = $(node).parents("li[role='treeitem']");
      $(">div>span>input", ancestors).click();
Refresh a treeview and expand last selected node

Refresh a treeview and expand last selected node

By : whoansoo kim
Date : March 29 2020, 07:55 AM
should help you out The AfterSelect on the TreeView have a parameter TreeViewEventArgs e. e.Node will return the selected node. eg:
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