使用XmlDocument创建XML文档及增加删除更新节点
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- using System;
- using System.Windows.Forms;
- using System.Xml;
-
- namespace XMLDemo
- {
- public partial class FrmXMLDOMDemo : Form
- {
- public FrmXMLDOMDemo()
- {
- InitializeComponent();
- }
-
- private void btnLoad_Click(object sender, EventArgs e)
- {
- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("Books.xml");
- MessageBox.Show(xmlDoc.InnerXml);
- }
-
- private void btnCreate_Click(object sender, EventArgs e)
- {
- XmlDocument xmlDoc = new XmlDocument();
-
-
- XmlDeclaration dec = xmlDoc.CreateXmlDeclaration("1.0", "GB2312", null);
- xmlDoc.AppendChild(dec);
-
-
- XmlElement root = xmlDoc.CreateElement("Books");
- xmlDoc.AppendChild(root);
-
- XmlNode book = xmlDoc.CreateElement("Book");
-
- XmlElement title = xmlDoc.CreateElement("Title");
- title.InnerText = "SQL Server";
- book.AppendChild(title);
-
- XmlElement isbn = xmlDoc.CreateElement("ISBN");
- isbn.InnerText = "444444";
- book.AppendChild(isbn);
-
- XmlElement author = xmlDoc.CreateElement("Author");
- author.InnerText = "jia";
- book.AppendChild(author);
-
- XmlElement price = xmlDoc.CreateElement("Price");
- price.InnerText = "120";
- price.SetAttribute("Unit", "$");
-
- book.AppendChild(price);
- root.AppendChild(book);
-
- xmlDoc.Save("Books.xml");
- }
-
- private void btnInsert_Click(object sender, EventArgs e)
- {
- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("Books.xml");
-
- XmlNode root = xmlDoc.SelectSingleNode("Books");
-
- XmlElement book = xmlDoc.CreateElement("Book");
-
- XmlElement title = xmlDoc.CreateElement("Title");
- title.InnerText = "XML";
- book.AppendChild(title);
-
- XmlElement isbn = xmlDoc.CreateElement("ISBN");
- isbn.InnerText = "333333";
- book.AppendChild(isbn);
-
- XmlElement author = xmlDoc.CreateElement("Author");
- author.InnerText = "moon";
- book.AppendChild(author);
-
- XmlElement price = xmlDoc.CreateElement("Price");
- price.InnerText = "120";
- price.SetAttribute("Unit", "¥");
-
- book.AppendChild(price);
-
- root.AppendChild(book);
-
- xmlDoc.Save("Books.xml");
- MessageBox.Show("数据已写入!");
- }
-
- private void btnUpdate_Click(object sender, EventArgs e)
- {
- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("Books.xml");
-
-
-
- XmlNodeList nodeList = xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
-
-
- foreach (XmlNode xn in nodeList)
- {
-
- XmlElement xe = (XmlElement)xn;
- if (xe.Name == "Author")
- {
- xe.InnerText = "amandag";
- }
-
- if (xe.GetAttribute("Unit") == "$")
- {
- xe.SetAttribute("Unit", "¥");
- }
- }
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- xmlDoc.Save("Books.xml");
- }
-
- private void btnDelete_Click(object sender, EventArgs e)
- {
- XmlDocument xmlDoc = new XmlDocument();
- xmlDoc.Load("Books.xml");
-
- XmlNodeList nodeList = xmlDoc.SelectSingleNode("Books//Book").ChildNodes;
-
-
- foreach (XmlNode xn in nodeList)
- {
-
- XmlElement xe = (XmlElement)xn;
- if (xe.Name == "Author")
- {
- xe.RemoveAll();
- }
-
- if (xe.GetAttribute("Unit") == "¥")
- {
- xe.RemoveAttribute("Unit");
- }
- }
- xmlDoc.Save("Books.xml");
- }
- }
- }