帮我看这个for写的对不.

Question

    for   i:=0   to   TreeView1.Items.Count-1   do
      if   TreeView1.Items[0].Item[i].Text=c_str   then
      begin
              TreeView1.Items[0].Item[i].Delete;
              exit;
      end;每次Delete都是最后一个.不知道为什么

Answer 1

delete有重后向前，否则很容易出错的，你这样每次删除 count都会变化

Answer 2

删除的话要倒着来for i:=TreeView1.Items.Count-1 downto 0 do
  if TreeView1.Items[0].Item[i].Text=c_str then
  begin
  TreeView1.Items[0].Item[i].Delete;
  exit;
  end;

Answer 3

因为删除了之后调用了exit，所以和遍历顺序无关，而至楼主用错了count的对象
for i:=0 to TreeView1.Items[0].Count-1 do  //是Items[0]的子节点个数，不是总个数
  if TreeView1.Items[0].Item[i].Text=c_str then
  begin
  TreeView1.Items[0].Item[i].Delete;
  exit;
  end;

Answer 4

删除的话，会引起Count变化，最好用downto

Answer 5

占个位置
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