c# 操作xml 增加节点...............................................新手求解,在线等

Question

<?xml version="1.0" encoding="utf-8" ?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap>
<loc>http://www.example.com/sitemap1.xml.gz</loc>
<lastmod>2004-10-01T18:23:17+00:00</lastmod>
</sitemap>
<sitemap>
<loc>http://www.example.com/sitemap2.xml.gz</loc>
<lastmod>2005-01-01</lastmod>
</sitemap>
</sitemapindex>public static void XmlInsertElement(string xmlPath, string MainNode, string Element, string Content)
        {
            XmlDocument objXmlDoc = new XmlDocument();
            objXmlDoc.Load(xmlPath);
            XmlNode objNode = objXmlDoc.SelectSingleNode(MainNode);
            XmlElement objElement = objXmlDoc.CreateElement(Element);
            objElement.InnerText = Content;
            objNode.AppendChild(objElement);
            objXmlDoc.Save(xmlPath);
        }调用 XmlInsertElement("xxx.xml","sitemapindex","sitemap","");
     XmlInsertElement("xxx.xml","sitemapindex/sitemap","loc","www.baidu.com");
     XmlInsertElement("xxx.xml","sitemapindex/sitemap","lastmod","2012-11-11");谁帮我改进下XmlInsertElement这个方法，能一次增加sitemap和下面多个子节点+值
注意：创建的时候 loc、lastmod不要跑到别的sitemap节点下
求解,要代码.谢谢~

Answer 1

多个就循环里面的objNode.AppendChild(objElement);

Answer 2

 XmlDocument doc = new XmlDocument();
            doc.LoadXml(xml);            XmlNodeList nodeList = doc.DocumentElement.ChildNodes;
            XmlElement newNode = null;
            foreach (XmlNode node in nodeList)
            {
                if (node.Name == "")
                {
                    foreach (XmlNode li in node.ChildNodes)
                    {
                        if (li.Name == "")
                        {
                            string s = li.Attributes[""].Value;                            newNode = doc.CreateElement("x");
                            newNode.SetAttribute("xx", "");
                            node.InsertAfter(newNode, li);
                        }
                    }
                }
            }

Answer 3

        public static void XmlInsertElement(string xmlPath, string locValue, string lastmod)
        {
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlPath);            XmlElement node = xmlDoc.CreateElement("sitemap");            XmlElement locNode= xmlDoc.CreateElement("loc");
            locNode.InnerText=locValue;
            node.AppendChild(locNode);            XmlElement lastmodNode = xmlDoc.CreateElement("lastmod");
            lastmodNode.InnerText = lastmod;
            node.AppendChild(lastmodNode);            xmlDoc.DocumentElement.AppendChild(node);
            xmlDoc.Save(xmlPath);
        }        // XmlInsertElement("..\\..\\test2.xml", "aasdfg", "123456");