/// <summary>        /// 获取url中的查询字符串参数        /// </summary>        public static NameValueCollection ExtractQueryParams(string url)        {            int startIndex = url.IndexOf("?");            NameValueCollection values = new NameValueCollection();            if (startIndex <= 0)                return values;            string[] nameValues = url.Substring(startIndex + 1).Split(‘&‘);            foreach (string s in nameValues)            {                string[] pair = s.Split(‘=‘);                string name = pair[0];                string value = http://www.mamicode.com/string.Empty;>