C# XML 之简单操作

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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", "张三");

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

        XmlElement xesub1 = xmldoc.CreateElement("title");
        xesub1.InnerText = "C#从入门到精通";
        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张三");

                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");

删除XML节点

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") == "张三")
            {
                xe.RemoveAll();
            }
        }

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

读取XML