string resoureHtml = "<ul><li><img src=http://www.mamicode.com/‘123‘/>
";        Lexer lexer = new Lexer(resoureHtml);        Parser parser = new Parser(lexer);        //获取UL标签        string tagName = "ul";        NodeFilter filter = new TagNameFilter(tagName);        StringBuilder sb = new StringBuilder();        NodeList nodeList = parser.Parse(filter);        var lis = nodeList[0].Children;        for (int i = 0; i < lis.Count; i++)        {            var li = lis[i];            sb.Append("<li>");            var img = li.Children;            for (int j = 0; j < img.Count; j++) {                var tag = (ImageTag)img[0];                var src= http://www.mamicode.com/tag.GetAttribute("src");                sb.AppendFormat("<img src=http://www.mamicode.com/"{0}\" data-value=http://www.mamicode.com/"{1}\"/>", src + "ti",src+"ti");            }            sb.Append("</li>");        }        var aaa = sb.ToString();