procedure Tcpya_app.FormCreate(Sender: TObject);
begin
datamodule2.tree.close;
datamodule2.tree.sql.clear;
datamodule2.tree.sql.add('select name from plat order by name');
datamodule2.tree.Active:=true;
datamodule2.tree.Open;
while not datamodule2.tree.Eof do
begin
with tv.Items do
begin
MyTreeNode1 := Add(nil,trim(datamodule2.tree.fields[0].asstring));//增加根节点
with datamodule2 do
begin
child.close;
child.SQL.Clear;
child.SQL.Add('select comp from dalei where plat='''+Trim(datamodule2.tree.Fields[0].asstring)+''''+' order by comp');
child.Active:=true;
child.Open;
While Not child.Eof do
begin
TV.Items.AddChild(mytreenode1,trim(child.Fields[0].AsString));
child.Next;
end; end;
datamodule2.tree.Next;
end;
end;
end;
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 }
{ and add a child node to it}
MyTreeNode2 := TreeView1.Items[3];
AddChild(MyTreeNode2,'ChildNode2a');
{Add another child to ChildNode2, after ChildNode2a }
Add(MyTreeNode2,'ChildNode2b');
{add another root node}
Add(MyTreeNode1, 'RootTreeNode3');
end;