c# 服务端去解析dom元素，或者xml，或者其它方法实现

Question

比如我有一段字符串 <div class="mzc_stepBar" style="float: left; text-align: right; width: 70%;">
                <ul>
                    <li class="mzc_active"><span>1</span></li>
                    <li><span>2</span></li>
                    <li class="mzc_last"><span>3</span></li>
                </ul>
                <div class="mzc_barLeft mzc_active">
                </div>
                <div class="mzc_barRight">
                </div>
            </div>
我在服务端如果想找到属于3的span，用什么方法最合适呢？
有人说可以在服务端用jquery的函数
有人说解析成dom
又有人说正则表达式(实在无奈可以用）
大家有没有真正在服务端实现用dom或者jquery呢？如果有的话，请附上代码，或者针对性的解决方案。

Answer 1

只会在JS里实现，需要遍历DOM节点的。
好像C#里正则是可以的。

Answer 2

正则，或者HtmlAgilityPack
去网上查查吧！

Answer 3

正则，或者HtmlAgilityPack
去网上查查吧！ 

Answer 4

用dom最好。
我只能给你复制我自己的代码 
dom写的找不到了。不好意思 ， 参考这个吧。
 private void button1_Click(object sender, EventArgs e)
        {
            string test = Application.StartupPath + "WriteLines.html";
            string textResult = Convert(test );
            MessageBox.Show(textResult );
        }
        public static string Convert(string html)
        {
            if (string.IsNullOrEmpty(html.Trim()))
            {
                return string.Empty;
            }
            using (SgmlReader reader = new SgmlReader())
            {
                reader.DocType = "HTML";
                reader.InputStream = new StringReader(html);
                using (StringWriter stringWriter = new StringWriter())
                {
                    using (XmlTextWriter writer = new XmlTextWriter(stringWriter))
                    {
                        reader.WhitespaceHandling = WhitespaceHandling.None;
                        writer.Formatting = Formatting.Indented;
                        XmlDocument doc = new XmlDocument();
                        doc.Load(reader);
                        doc.Save("c:\\txt.xml");
                        if (doc.DocumentElement == null)
                        {
                            return string.Empty;
                        }
                        else
                        {
                            doc.DocumentElement.WriteContentTo(writer);
                        }
                        writer.Close();
                        string xhtml = stringWriter.ToString();
                        return xhtml;
                    }
                }
            }
        }        private void button2_Click(object sender, EventArgs e)
        {
            object Zero = 0;
            object EmptyString = "";
            axWebBrowser1.Navigate(textBox1.Text, ref Zero, ref EmptyString, ref EmptyString, ref EmptyString);
        }        private void axWebBrowser1_DocumentComplete(object sender, AxSHDocVw.DWebBrowserEvents2_DocumentCompleteEvent e)
        {
            IHTMLDocument2 HTMLDocument = (IHTMLDocument2)axWebBrowser1.Document;
            IHTMLElementCollection links = HTMLDocument.links;            listBox1.Items.Clear();
            string uspath = Application.StartupPath + "\\WriteLines.html";
            uspath.Remove(0);
            //using ( StreamWriter sw = new StreamWriter(@"C:\WriteLines.html", true))
            using (StreamWriter sw = new StreamWriter(uspath, true))
                foreach (HTMLAnchorElementClass el in links)
                {
                    listBox1.Items.Add(el.outerHTML);
                    sw.WriteLine(el.outerHTML);
                    sw.Close();
                }
        }        private void button3_Click(object sender, EventArgs e)
        {
            string uspath = Application.StartupPath + "\\WriteLines.html";
            StreamReader objreder = new StreamReader(uspath );
            string sling = "";
            ArrayList arlist = new ArrayList();
            while (sling != null)
            {
                sling = objreder.ReadLine();
                //插入数组；
                Convert(sling );
                if (sling != null)
                    arlist.Add(sling);
            }
            objreder.Close();
            foreach (string strout in arlist)
            {
                MessageBox.Show(strout );
            }
        }    }

Answer 5

c#解析dom 强烈推荐HtmlAgilityPack