ASP.NET XML操作示例-优快云博客

本文链接：https://blog.youkuaiyun.com/leo_qh/article/details/2075978

本文介绍了一个使用ASP.NET进行XML文件读写操作的具体实例，包括读取XML中已知和未知属性、向XML文件中添加新的元素及修改和删除元素的过程。

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using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Xml;

public partial class Default2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        //读取XML
        //已知属性名
        //XmlDocument xmlDoc = new XmlDocument();
        //xmlDoc.Load(Server.MapPath("test.xml"));

//XmlNode xn = xmlDoc.SelectSingleNode("bookstore");

//XmlNodeList xnl = xn.ChildNodes;

//foreach (XmlNode xn1 in xnl)
 //{
 // XmlElement xe = (XmlElement)xn1;
 // Response.Write(xe.GetAttribute("genre")+" ");
 // Response.Write(xe.GetAttribute("ISBN") + " ");

// XmlNodeList subxn = xe.ChildNodes;
 // foreach (XmlNode xn2 in subxn)
 // {
 // Response.Write(xn2.InnerText+" ");
 // }
 // Response.Write(" ");
 //}
 //未知属性名
 XmlDocument XmlDoc = new XmlDocument();
 XmlDoc.Load(Server.MapPath("test.xml"));
 XmlNode xn = XmlDoc.SelectSingleNode("bookstore");
 XmlNodeList xnl = xn.ChildNodes;
 foreach (XmlNode xn1 in xnl)
 {
 XmlElement xe = (XmlElement)xn1;
 XmlAttributeCollection xc = xe.Attributes;
 for (int i = 0; i < xe.Attributes.Count; i++)
 {
 Response.Write(xc.Item(i).Name + ":&nbsp");
 Response.Write(xc.Item(i).Value + " ");
 }
 XmlNodeList xnl2 = xe.ChildNodes;
 foreach (XmlNode xn2 in xnl2)
 {
 Response.Write(xn2.InnerText);
 Response.Write(" ");
 }
 Response.Write(" ");
 }

    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        //写入XML
        XmlDocument XmlDoc = new XmlDocument();
        XmlDoc.Load(Server.MapPath("test.xml"));
        XmlNode xn = XmlDoc.SelectSingleNode("bookstore");

        XmlElement subxml1 = XmlDoc.CreateElement("book");
        subxml1.SetAttribute("genre", "leo");
        subxml1.SetAttribute("ISBN", "123-456-789");

        XmlElement subXmlxe1 = XmlDoc.CreateElement("title");
        subXmlxe1.InnerText = "饮食学";
        subxml1.AppendChild(subXmlxe1);

        XmlElement subXmlxe2 = XmlDoc.CreateElement("author");
        subXmlxe2.InnerText = "秦浩";
        subxml1.AppendChild(subXmlxe2);

        XmlElement subXmlxe3 = XmlDoc.CreateElement("price");
        subXmlxe3.InnerText = "888888";
        subxml1.AppendChild(subXmlxe3);

xn.AppendChild(subxml1);

XmlDoc.Save(Server.MapPath("test.xml"));

    }
    protected void Button3_Click(object sender, EventArgs e)
    {
        XmlDocument XmlDoc = new XmlDocument();
        XmlDoc.Load(Server.MapPath("test.xml"));
        XmlNodeList xnl = XmlDoc.SelectSingleNode("bookstore").ChildNodes;//获取bookstore节点的所有子节点
        foreach(XmlNode xn in xnl)
        {
            XmlElement xe = (XmlElement)xn;
            if(xe.GetAttribute("genre")=="leo")
            {
                xe.SetAttribute("genre","qinhao");
                XmlNodeList xel = xe.ChildNodes;
                foreach(XmlNode xn1 in xel)
                {
                    XmlElement xe1=(XmlElement)xn1;
                    if(xe1.Name=="title")
                    {
                        xe1.InnerText = "C#";
                    }
                }
            }
        }
        XmlDoc.Save(Server.MapPath("test.xml"));
    }
    protected void Button4_Click(object sender, EventArgs e)
    {
        XmlDocument XmlDoc = new XmlDocument();
        XmlDoc.Load(Server.MapPath("test.xml"));
        XmlNodeList xnl1 = XmlDoc.SelectSingleNode("bookstore").ChildNodes;
        foreach(XmlNode xn1 in xnl1 )
        {
            XmlElement xe = (XmlElement)xn1;
            if (xe.GetAttribute("genre") == "qinhao")
            {
                //xe.RemoveAttribute("genre");
                xe.RemoveAll();
            }

        }
        XmlDoc.Save(Server.MapPath("test.xml"));
    }
}