LIstbox1双击编辑，回车提交修改

拖一个LIstbox1和Edit2到界面上

procedure TForm8.ListBox1DblClick(Sender: TObject);
var
  ItemIndex: Integer;
begin
  ItemIndex := ListBox1.ItemIndex;  // 获取双击的项
  if ItemIndex >= 0 then    begin
    // 弹出输入框 让用户输入
   edit2.Text:= ListBox1.Items[ItemIndex];
   edit2.SetBounds(listbox1.Left+2,listbox1.ItemHeight*(ListBox1.ItemIndex)//+ ToolBar2.Height
               ,listbox1.Width , listbox1.ItemHeight+2);
   edit2.Visible:=true;
   if edit2.CanFocus then  edit2.Focused;
  end;
end;

  

procedure TForm8.Edit2KeyPress(Sender: TObject; var Key: Char);       //双击 修改表名
var aListBoxIndex: integer;
begin
  case Key of
   #27:   begin      //ESC
      edit2.Visible:=false;
      edit2.Text:='';
      exit;
   end;

   #13: if   (trim(Edit2.Text) <> '')  then  begin //回车键
          aListBoxIndex:= listbox1.ItemIndex;
          if  listbox1.Items.IndexOf(trim(Edit2.Text)) >=0 then   begin
              //OutResltMemo.Lines.Text:='表 '+trim(Edit2.Text) +'重复' ;
               Exit;
          end;
          if (leftStr(Edit2.Text,1)>='0') and (leftStr(Edit2.Text,1)<='9') then   begin
             // OutResltMemo.Lines.Text:='表名 不能以 数字 开头' ;
              Exit;
          end;

        if FDConnection1.Connected then           begin
          FDConnection1.ExecSQL(' ALTER TABLE '+ ListBox1.Items[ListBox1.ItemIndex] +' rename to ' +trim(Edit2.Text));
          Edit2.Visible := false;
//          FDConnection1.GetTableNames('', '', '', ListBox1.Items);
          listbox1.ItemIndex:= aListBoxIndex;
        end;
   end;
  end;
end;