回憶一個C#對XML的增删改查操作

好久不用XML了。最近做Silverlight項目，需要通過Web Service通路一些C++的Dll.

使用XML傳遞資料。正好複習一下XML操作。

大氣象

using System;

using System.Collections.Generic;

using System.Linq;

using System.Web;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Xml;

using System.IO;

namespace HCLoad.Web

{

    public partial class TestXml : System.Web.UI.Page

    {

        protected void Page_Load(object sender, EventArgs e)

        {

            LoadXml();

        }

        private void LoadXml()

            XmlDocument xmlDoc = new XmlDocument();

            string strXml =

            @"<?xml version=""1.0"" encoding=""utf-16"" ?>

            <projects>

                <project id=""1"">p1</project>

                <project id=""2"">

                    <name>p2</name>

                </project>

            </projects>";

            xmlDoc.LoadXml(strXml);

            //Response.Write("<script>alert('" + xmlDoc.OuterXml + "');</script>");//OuterXml是該結點包含的全部内容

            //Response.Write(xmlDoc.OuterXml);//直接在浏覽器中輸出xml文檔是空白，因為浏覽器無法解析這些标簽。

            //根據屬性值查詢

            XmlElement theProject = (XmlElement)xmlDoc.DocumentElement.SelectSingleNode("/projects/project[@id='1']");

            Response.Write(theProject.InnerText);

            //根據子節點值查詢

            XmlElement theProject2 = (XmlElement)xmlDoc.DocumentElement.SelectSingleNode("/projects/project[name='p2']");

            Response.Write(theProject2.InnerText);//注意是查詢到name那一層了。

            //通過标簽名查詢，并修改

            xmlDoc.GetElementsByTagName("project").Item(0).InnerText = "p11";

            //Response.Write("<script>alert('" + xmlDoc.OuterXml + "');</script>");

            //增加屬性

            XmlElement theElement = xmlDoc.DocumentElement.FirstChild as XmlElement;

            theElement.SetAttribute("no", "001");

            //删除結點

            //theElement.ParentNode.RemoveChild(theProject);

            //删除結點集

            XmlNodeList nodeList = xmlDoc.DocumentElement.SelectNodes("/projects/project[@id<3]");

            for (int i = 0; i < nodeList.Count; i++)

            {

                nodeList.Item(i).ParentNode.RemoveChild(nodeList.Item(i));

            }

            Response.Write("<script>alert('" + xmlDoc.OuterXml + "');</script>");

    }

}

看到一位新手的筆記：