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How can I expand or collapse the nodes in a TreeViewAdv programmatically?

Platform: WinForms |
Control: TreeViewAdv |
Published Date: April 30, 2011 |
Last Revised Date: July 10, 2014

 

TreeViewAdv has methods like ExpandAll and CollapseAll to expand and collapse all the nodes respectively. But to expand a particular node for a single level, you could use the Expand method in the TreeNodeAdv class. To collapse a node for a single level, set its Expanded property to false.

C#

//Expands All Cloapsed node

this.treeViewAdv1.ExpandAll();

//Expands the Node upto Single Level

this.treeViewAdv1.SelectedNode.Expand();

//Collapses All Expanded Nodes

this.treeViewAdv1.CollapseAll();

//Collapses a Node for Single Level

CollapseNode(this.treeViewAdv1.SelectedNode);

//Collapse the Node with all its Children nodes by Recursive method

private void CollapseNode(TreeNodeAdv node)

{

foreach(TreeNodeAdv tna in node.Nodes)

{

CollapseNode(tna);

}

node.Expanded = false;

}

VB

'Expands All Cloapsed node

Me.treeViewAdv1.ExpandAll()

'Expands the Node upto Single Level

Me.treeViewAdv1.SelectedNode.Expand()

'Collapses All Expanded Nodes

Me.treeViewAdv1.CollapseAll()

'Collapses a Node for Single Level

CollapseNode(Me.treeViewAdv1.SelectedNode)

'Collapse the Node with all its Children nodes by Recursive method

Private Sub CollapseNode(ByVal node As TreeNodeAdv)

For Each tna As TreeNodeAdv In node.Nodes

CollapseNode(tna)

Next tna

node.Expanded = False

End Sub

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