/// <summary>        /// 讀取城市列表        /// </summary>        public void CityList() {            StringBuilder sb = new StringBuilder();            XmlDocument xmldoc = new XmlDocument();            xmldoc.Load(Server.MapPath("/XmlData/City.xml"));//加載xml            XmlNodeList xmlnlist = xmldoc.SelectNodes("/Cities/City");//讀取xml的節點列表            for (int i = 0; i < xmlnlist.Count; i++) {                sb.Append("<a href=/"index.aspx?cityid=" + xmlnlist[i].Attributes["ID"] .Value+ "/">" + xmlnlist[i].Attributes["CityName"] .Value+ "</a>");//循環讀取里面的值            }            citys = sb.ToString();        }////------附xml格式------/////////////////<?xml version="1.0" encoding="utf-8"?><Cities>  <City ID="218" CityName="南寧" PID="20" Z