XML的增删改查时间：2022-10-20 22:08:54 <%@ Page Language="C#" %> <%@ Import Namespace="System.Xml" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server"> private string file = HttpContext.Current.Server.MapPath("bookstore.xml"); private XmlDocument doc = new XmlDocument(); private StringBuilder sb = new StringBuilder(); public void Page_Load(Object sender, EventArgs e) { if (!IsPostBack) ReadXml(); } //显示所有数据 private void ReadXml() { doc.Load(file); XmlNodeList nodeList = doc.SelectSingleNode("bookstore").ChildNodes; foreach (XmlNode node in nodeList) { XmlElement element = (XmlElement)node; sb.Append(element.GetAttribute("genre") + "<br />"); //显示属性值 sb.Append(element.GetAttribute("ISBN") + "<br />"); XmlNodeList nextNodeList = element.ChildNodes; foreach (XmlNode nextNode in nextNodeList) { sb.Append(nextNode.InnerText + "<br />"); //显示子节点文本 } } ltXml.Text = sb.ToString(); } //增加 protected void btnAdd_Click(object sender, EventArgs e) { doc.Load(file); XmlNode node = doc.SelectSingleNode("bookstore"); //查找<bookstore>节点 XmlElement element = doc.CreateElement("book"); //创建一个<book>节点 element.SetAttribute("genre", "Text"); //设置该节点genre属性 element.SetAttribute("ISBN", "7-8-98"); //设置该节点ISBN属性 XmlElement titleElement = doc.CreateElement("title"); titleElement.InnerText = "TextTitle"; //设置文本 element.AppendChild(titleElement); XmlElement authorElement = doc.CreateElement("author"); authorElement.InnerText = "TextAuthor"; element.AppendChild(authorElement); XmlElement priceElement = doc.CreateElement("price"); priceElement.InnerText = "9.22"; element.AppendChild(priceElement); node.AppendChild(element); //添加到<bookstore>节点中 doc.Save(file); ReadXml(); } //修改 protected void btnUpdate_Click(object sender, EventArgs e) { doc.Load(file); XmlNodeList nodeList = doc.SelectSingleNode("bookstore").ChildNodes; foreach(XmlNode node in nodeList) { XmlElement element = (XmlElement)node; //将子节点类型转换为XmlElement类型 if (element.GetAttribute("genre") == "Text") //如果genre属性值为“Text” { element.SetAttribute("genre", "updateText"); //则修改该属性为“updateText” XmlNodeList nextNodeList = element.ChildNodes; //继续获取element子节点的所有子节点 foreach (XmlNode nextNode in nextNodeList) { if (nextNode.Name == "author") { nextNode.InnerText = "亚胜"; break; } } break; } } doc.Save(file); ReadXml(); } //删除 protected void btnDelete_Click(object sender, EventArgs e) { doc.Load(file); XmlNodeList nodeList = doc.SelectSingleNode("bookstore").ChildNodes; foreach (XmlNode node in nodeList) { XmlElement element = (XmlElement)node; if (element.GetAttribute("genre") == "fantasy") element.RemoveAttribute("genre"); //按名称移除属性 else if (element.GetAttribute("genre") == "updateText") element.RemoveAll(); //移除所有属性和子级 } doc.Save(file); ReadXml(); } </script> <html xmlns="http://www.w3.org/1999/xhtml"> <head runat="server"> <title>Xml增删改查</title> </head> <body> <form runat="server"> <div> <asp:Literal ID="ltXml" runat="server"></asp:Literal><br /> <asp:Button ID="btnAdd" runat="server" Text="AddXml" onclick="btnAdd_Click" /> <asp:Button ID="btnUpdate" runat="server" Text="UpdateXml" onclick="btnUpdate_Click" /> <asp:Button ID="btnDelete" runat="server" Text="DeleteXml" onclick="btnDelete_Click" /> </div> </form> </body> </html> bookstore.xml的内容如下： <?xml version="1.0" encoding="utf-8"?> <bookstore> <book genre="fantasy" ISBN="2-3631-4"> <title>Oberon's Legacy</title> <author>Corets, Eva</author> <price>5.95</price> </book> </bookstore>
