delphi 遍历treeview某个节点下所有节点的函数

function treeallnode(anode:Ttreenode):string;
 var
 i:integer;
 mystr:string;
begin
for i:=0 to anode.Count-1 do
 begin
 if mystr<>'' then
 mystr:=mystr+'|'+trim(trim(anode[i].Text))
 else
 xxx:=trim(trim(anode[i].Text));
 if anode[i].HasChildren then
  if mystr<>'' then
   mystr:=mystr+'|'+trim(treeallnode(anode[i]))
  else
   mystr:=trim(treeallnode(anode[i]));
end;
result:=mystr;
end;