.NET下拉框的悬浮提示

        /// <summary>
        /// 悬浮提示
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void DropDownList_F8_DataBound(object sender, EventArgs e)
        {
            ListItemCollection items = ((DropDownList)sender).Items;

            for (int i = 0; i < items.Count; i++)
            {

                ListItem item = items[i];

                item.Attributes.Add("title", item.Text);

            }
        }