1、获取url字符串中的参数

/// 
        /// 从url里获取参数        /// 
        /// url        /// 参数key        /// 
     
      参数value
             private string GetUrlParamValue(string url,string key)        {            Regex urlRegex = new Regex(@"(?:^|/?|&)" + key + "=([^&]*)(?:&|$)");            Match m = urlRegex.Match(url.ToLower());            string value = string.Empty;            if (m.Success)            {                value = m.Groups[1].Value;            }            return value;        }