Windows Forms FAQ resources

24. Windows Forms TreeView

The following code snippet demonstrates how you can clone or copy all the nodes in TreeView1 to TreeView2 by clicking on Button1.

[C#]

private void IterateTreeNodes (TreeNode originalNode, TreeNode rootNode)

{

foreach( TreeNode childNode in originalNode.Nodes)

{

TreeNode newNode = new TreeNode(childNode.Text);

newNode.Tag = childNode.Tag;

this.treeView2.SelectedNode = rootNode;

this.treeView2.SelectedNode.Nodes.Add(newNode);

IterateTreeNodes(childNode, newNode);

}

//Button Click code

private void button1_Click(object sender, System.EventArgs e)

{

foreach( TreeNode originalNode in this.treeView1.Nodes)

{

TreeNode newNode = new TreeNode(originalNode.Text);

newNode.Tag = originalNode.Tag;

this.treeView2.Nodes.Add(newNode);

IterateTreeNodes(originalNode, newNode);

}

[VB.NET]

Private Sub IterateTreeNodes(ByVal originalNode As TreeNode, ByVal rootNode As TreeNode)

Dim childNode As TreeNode

For Each childNode In originalNode.Nodes

Dim NewNode As TreeNode = New TreeNode(childNode.Text)

NewNode.Tag = childNode.Tag

Me.treeView2.SelectedNode = rootNode

Me.treeView2.SelectedNode.Nodes.Add(NewNode)

IterateTreeNodes(childNode, NewNode)

End Sub

'Button Click code

Private Sub button1_Click(ByVal sender As Object, ByVal e As System.EventArgs)

Dim originalNode As TreeNode

For Each originalNode In Me.treeView1.Nodes

Dim NewNode As TreeNode = New TreeNode(originalNode.Text)

NewNode.Tag = originalNode.Tag

Me.treeView2.Nodes.Add(NewNode)

IterateTreeNodes(originalNode, NewNode)

End Sub