代码如下: class ExchangeRate { private const string _BASEURL = “网页地址”; public const string CURRENCYCODE = “货币类型以’|’隔开”;//货币类型 public Hashtable GetValues() { Hashtable htReturn = new Hashtable(); string url = _BASEURL; //+ HttpUtility.UrlEncode(tmSet.ToString(“yyyy/MM/dd”, DateTimeFormatInfo.InvariantInf