listview小弟我添加数据不显示[急]

/// <summary>
        /// 将数据存储到lv里面
        /// </summary>
        private void refreshList(List<defInfo> list)
        {
            this.lv_Show.Items.Clear();
            for (int i = 0; i < list.Count; i++)
            {
                ListViewItem lvi = new ListViewItem();
                lvi.SubItems.Add(list[i].defName);
                lvi.SubItems.Add(list[i].defValue);
                this.lv_Show.Items.Add(lvi);
            }
            this.lv_Show.Refresh();
        }