c#获取url中的查询字符串参数

        /// <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 = string.Empty;

                if (pair.Length > 1)
                    value = pair[1];

                values.Add(name, value);
            }

            return values;
        }