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Expand the child nodes of selected TreeNodeAdvIn the TreeViewAdv, TreeNodeAdv can be expanded by using the Expand and ExpandAll functions. 1. Expand: This function helps to expand a particular TreeNodeAdv. 2. ExpandAll: This function helps to expand the node and all its sub nodes.
To expand all the child nodes under the selected TreeNodeAdv programmatically, follow the steps: 1. Handle AfterSelect event that is triggered when the TreeNodeAdv is selected. 2. Iterate the TreeNodeAdvCollection and invoke the Expand function. C# //The event is raised on TreeNodeAdv selection. private void treeViewAdv1_AfterSelect(object sender, EventArgs e) { string selectedNode = this.treeViewAdv1.SelectedNode.Text; if (this.treeViewAdv1.Nodes.Count > 0) { foreach (TreeNodeAdv treeNode in Collect(this.treeViewAdv1.Nodes)) { if (selectedNode == treeNode.Text) { //Expands all the TreeNodeAdv. treeNode.ExpandAll(); break; } } } } VB 'The event is raised on TreeNodeAdv selection. Private Sub treeViewAdv1_AfterSelect(ByVal sender As Object, ByVal e As EventArgs) Handles treeViewAdv1.AfterSelect Dim selectedNode As String = Me.treeViewAdv1.SelectedNode.Text If Me.treeViewAdv1.Nodes.Count > 0 Then For Each treeNode As TreeNodeAdv In Me.treeViewAdv1.Nodes If selectedNode = treeNode.Text Then 'Expands all the TreeNodeAdv. treeNode.ExpandAll() Exit For End If Next treeNode End If End Sub
Figure 1: Before expanding the TreeNodeAdv Figure 2: After expanding the TreeNodeAdv on selection Samples: |
2X faster development
The ultimate WinForms UI toolkit to boost your development speed.
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