Add/Remove/Disable Nodes

With RadTreeView it is easy to add, remove or disable nodes at runtime. This example shows how to add, remove or disable a node upon NodeClick. For this purpose the NodeClick event is wired up.

[C#]

protected void RadTreeView1_NodeClick(object sender, RadTreeNodeEventArgs NodeEvent)
{
    RadTreeNode clickedNode = NodeEvent.Node;

    if (!(clickedNode.Owner is RadTreeView))
    {
        switch ( ((RadTreeNode) clickedNode.Owner).Value)
        {
            case "Add":
                RadTreeNode newNode = new RadTreeNode();
                newNode.Text = clickedNode.Text + " (Clone)";
                //Adds the node to the Nodes collection of the clicked node's owner - it might be the treeview itself
                clickedNode.Owner.Nodes.Add(newNode);
                break;
            case "Delete":
                RadTreeNode parent = (RadTreeNode)clickedNode.Parent;
                //Removes the node from the Nodes collection of the clicked node's parent
                parent.Nodes.Remove(clickedNode);
                break;
            case "Disable":
                //Disables the node
                clickedNode.Enabled = false;
                break;
        }
    }
}

Protected Sub RadTreeView1_NodeClick(ByVal sender As Object, ByVal NodeEvent As RadTreeNodeEventArgs) Handles RadTreeView1.NodeClick
    Dim clickedNode As RadTreeNode = NodeEvent.Node

    If Not TypeOf clickedNode.Owner Is RadTreeView Then
        Select Case CType(clickedNode.Owner, RadTreeNode).Value
            Case "Add"
                Dim newNode As New RadTreeNode()
                newNode.Text = clickedNode.Text + " (Clone)"
                'Adds the node to the Nodes collection of the clicked node's owner - it might be the treeview itself
                clickedNode.Owner.Nodes.Add(newNode)
            Case "Delete"
                'Removes the node from the Nodes collection of the clicked node's parent 
                CType(clickedNode.Parent, RadTreeNode).Nodes.Remove(clickedNode)
            Case "Disable"
                'Disables the node
                clickedNode.Enabled = False
        End Select
    End If
End Sub

Select a node and click a button.

Related Resources

• Working with Nodes in Server-Side Code
• Add a Node in edit mode by Default