/// <summary>

        /// 获取html网页标签内容

        /// 例如：<span class="index_infoItem__ESU0o"></span>

        /// </summary>

        /// <param name="html">html内容</param>

        /// <param name="tag">标签 例如：span</param>

        /// <param name="attribute">标签属性 例如：class</param>

        /// <param name="value">标签属性值 例如：index_infoItem__ESU0o</param>

        /// <returns></returns>

        public static string[] RegexHtmlToFormat(string html, string tag, string attribute, string value)

        {

            List<string> list = new List<string>();

            string regex_html = @"<"+ tag + ".*?"+ attribute + "=.*?"+ value + ".*?[^>]*?>.*?</" + tag + ">"; //定义html标签的正则表达式

            Regex regex = new Regex(regex_html, RegexOptions.IgnoreCase);

            if (regex.IsMatch(html))

            {

                MatchCollection matchCollection = regex.Matches(html);

                foreach (Match match in matchCollection)

                {

                    var valueHtml = match.Value;

                    valueHtml = Regex.Replace(valueHtml, @"<(.[^>]*)>", "", RegexOptions.IgnoreCase);//去除html标签

                    list.Add(valueHtml);//获取到的

                }

            }

            return list.ToArray();

        }