TreeViewAddChild (Delphi)

Description

The following example demonstrates how to add nodes and child nodes to a TTreeView control.

Code

procedure TForm1.Button1Click(Sender: TObject);
var
  MyTreeNode1, MyTreeNode2: TTreeNode;
begin
  with TreeView1.Items do
  begin
    Clear; { Remove any existing nodes. }
    MyTreeNode1 := Add(nil, 'RootTreeNode1'); { Add a root node. }
    { Add a child node to the node just added. }
    AddChild(MyTreeNode1,'ChildNode1');

    {Add another root node}
    MyTreeNode2 := Add(MyTreeNode1, 'RootTreeNode2');
    {Give MyTreeNode2 to a child. }
    AddChild(MyTreeNode2,'ChildNode2');

    {Change MyTreeNode2 to ChildNode2 }
    { Add a child node to it. }
    MyTreeNode2 := TreeView1.Items[3];
    AddChild(MyTreeNode2,'ChildNode2a');

    { Add another child to ChildNode2, after ChildNode2a. }
    AddChild(MyTreeNode2,'ChildNode2b');

    { Add another root node. }
    Add(MyTreeNode1, 'RootTreeNode3');
  end;
end;

Uses

• Vcl.ComCtrls.TTreeNodes.Add ( fr | de | ja )
• Vcl.ComCtrls.TTreeNodes.AddChild ( fr | de | ja )