C# XML 之簡單操作

添加XML

 

        XmlDocument xmldoc = new XmlDocument();

        xmldoc.Load(Server.MapPath("~") + "/test.xml");

        XmlNode root = xmldoc.SelectSingleNode("bookstore");


        XmlElement xe1 = xmldoc.CreateElement("book");

        xe1.SetAttribute("genre", "張三");

        xe1.SetAttribute("ISBN", "2-3631-4");

        XmlElement xesub1 = xmldoc.CreateElement("title");
        xesub1.InnerText = "C#從入門到精通";
        xe1.AppendChild(xesub1);

        XmlElement xesub2 = xmldoc.CreateElement("Author");
        xesub2.InnerText = "侯捷";
        xe1.AppendChild(xesub2);

        XmlElement xesub3 = xmldoc.CreateElement("Price");
        xesub3.InnerText = "69.8";
        xe1.AppendChild(xesub3);

        root.AppendChild(xe1);

        xmldoc.Save(Server.MapPath("~/test.xml"));

 

修改XML

 

XmlDocument xmldoc = new XmlDocument();

        xmldoc.Load(Server.MapPath("~") + "/test.xml");

        XmlNodeList NodeList = xmldoc.SelectSingleNode("bookstore").ChildNodes;

        foreach (XmlNode node in NodeList)
        {
            XmlElement xe = (XmlElement)node;

            Response.Write(xe.GetAttribute("genre"));

            if (xe.GetAttribute("genre") == "Jack")
            {
                xe.SetAttribute("genre", "Update張三");
              
                XmlNodeList xnl = xe.ChildNodes;

                foreach (XmlNode xn in xnl)
                {
                    XmlElement xe2 = (XmlElement)xn;
                    if (xe2.Name == "Author")
                    {
                        Response.Write(xe2.InnerText);
                        xe2.InnerText = "李四";
                        break;
                    }
                }
            }
        }

        xmldoc.Save(Server.MapPath("~") + "/test.xml");

 

刪除XML節點

XmlDocument xmldoc = new XmlDocument();

        xmldoc.Load(Server.MapPath("~") + "/test.xml");

        XmlNodeList nodeList = xmldoc.SelectSingleNode("bookstore").ChildNodes;

        foreach (XmlNode node in nodeList)
        {
            XmlElement xe = (XmlElement)node;

            if (xe.GetAttribute("genre") == "fantasy")
            {
                xe.RemoveAttribute("genre");
            }

            if (xe.GetAttribute("genre") == "張三")
            {
                xe.RemoveAll();
            }
        }
       
        xmldoc.Save(Server.MapPath("~") + "/test.xml");

 

 

讀取XML

 

        XmlDocument xmldoc = new XmlDocument();

        xmldoc.Load(Server.MapPath("~") + "/test.xml");

        XmlNodeList NodeList = xmldoc.SelectSingleNode("bookstore").ChildNodes;

        foreach (XmlNode xn in NodeList)
        {
            XmlElement xe = (XmlElement)xn;

            Response.Write(xe.GetAttribute("genre") + "<br>");

            Response.Write(xe.GetAttribute("ISBN") + "<br>");

            XmlNodeList xnl = xn.ChildNodes;

            foreach (XmlNode xn2 in xnl)
            {
                Response.Write(xn2.InnerText + "<br>");
            }
        }