青色熊

 public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        string xmlPath = System.Windows.Forms.Application.StartupPath + "\\html\\home.html";

        private void buttonBuild_Click(object sender, EventArgs e)
        {
              
            string navStr = "<ul class=\"navbar-nav ms-auto  \"><li class=\"nav-item \"><a class=\"nav-link \" href=\"#\" style=\"min-width: 60px\">主頁</a></li><li class=\"nav-item\"><a class=\"nav-link\" href=\"#\" style=\"min-width: 60px\">下載</a></li></ul>";


            XmlDocument navDoc = new XmlDocument();
            navDoc.LoadXml(navStr);


             

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlPath);
            XmlNode divNode = xmlDoc.SelectSingleNode("html/body/nav/div/div");

           
            XmlElement divElement = (XmlElement)divNode;

            XmlNode   navNode= xmlDoc.ImportNode(navDoc.DocumentElement, true);


            divElement.AppendChild(navNode);

            xmlDoc.Save(xmlPath);

        }

        private void buttonActive_Click(object sender, EventArgs e)
        {
            
            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.Load(xmlPath);
            XmlNode homeNode = xmlDoc.SelectSingleNode("html/body/nav/div/div/ul/li/a");
            System.Diagnostics.Trace.WriteLine(homeNode.Name);

            XmlElement homeElement = (XmlElement)homeNode;
            string classStr = homeElement.GetAttribute("class");

            string activeStr = "active";
            int activeIndex = classStr.IndexOf(activeStr);
            if (activeIndex < 0)
            {
                classStr += " " + activeStr;
                homeElement.SetAttribute("class", classStr);
            }



            xmlDoc.Save(xmlPath);
        }
    }