1.已知有一个XML文件（bookstore.xml）如下：
|
<?xml version="1.0" encoding="gb2312"?> |
1、往<bookstore>节点中插入一个<book>节点：
|
XmlDocument xmlDoc=new XmlDocument(); |
//================
结果为：
|
<?xml version="1.0" encoding="gb2312"?> |
2、修改节点：将genre属性值为“李赞红“的节点的genre值改为“update李赞红”，将该节点的子节点<author>的文本修改为“亚胜”。
|
XmlNodeList nodeList=xmlDoc.SelectSingleNode("bookstore").ChildNodes;//获取bookstore节点的所有子节点 |
//=================
最后结果为：
|
<?xml version="1.0" encoding="gb2312"?> |
3、删除 <book genre="fantasy" ISBN="2-3631-4">节点的genre属性，删除 <book genre="update李赞红" ISBN="2-3631-4">节点。
|
XmlNodeList xnl=xmlDoc.SelectSingleNode("bookstore").ChildNodes; |
|
if(xe.GetAttribute("genre")=="fantasy") |
//====================
最后结果为：
| <?xml version="1.0" encoding="gb2312"?> <bookstore> <book ISBN="2-3631-4"> <title>Oberon's Legacy</title> <author>Corets, Eva</author> <price>5.95</price> </book> <book> </book> </bookstore> |
4、显示所有数据。
|
XmlNode xn=xmlDoc.SelectSingleNode("bookstore"); |
留做参考,原文地址http://blog.yesky.com/75/richsee/1211075.shtml
2前台代码：html
<%@ Page language="c#" Codebehind="Main.aspx.cs" AutoEventWireup="false" Inherits="DsAndXML.OpXMLFile.Main" %>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>Main</title> <meta name="GENERATOR" Content="Microsoft Visual Studio 7.0"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Main" method="post" runat="server"> <FONT face="宋体"> <asp:DataGrid id="dgShow" style="Z-INDEX: 100; LEFT: 113px; POSITION: absolute; TOP: 32px" runat="server" Width="480px" Height="178px"></asp:DataGrid> <asp:Label id="Label3" style="Z-INDEX: 111; LEFT: 187px; POSITION: absolute; TOP: 383px" runat="server" Width="120px" Height="21px">新邮件地址：</asp:Label> <asp:Label id="Label2" style="Z-INDEX: 107; LEFT: 333px; POSITION: absolute; TOP: 274px" runat="server" Width="83px" Height="21px">邮件地址：</asp:Label> <asp:Button id="btnAdd" style="Z-INDEX: 104; LEFT: 298px; POSITION: absolute; TOP: 324px" runat="server" Text="添加"></asp:Button> <asp:Button id="btnDelete" style="Z-INDEX: 103; LEFT: 199px; POSITION: absolute; TOP: 324px" runat="server" Text="删除"></asp:Button> <asp:Button id="btnChange" style="Z-INDEX: 102; LEFT: 102px; POSITION: absolute; TOP: 382px" runat="server" Text="修改"></asp:Button> <asp:Button id="btnQuery" style="Z-INDEX: 101; LEFT: 101px; POSITION: absolute; TOP: 324px" runat="server" Text="查询"></asp:Button> <asp:DropDownList id="ddlName" style="Z-INDEX: 105; LEFT: 210px; POSITION: absolute; TOP: 274px" runat="server" Width="95px" Height="78px"></asp:DropDownList> <asp:Label id="Label1" style="Z-INDEX: 106; LEFT: 100px; POSITION: absolute; TOP: 274px" runat="server" Width="83px" Height="21px">姓名：</asp:Label> <asp:Label id="lbEmail" style="Z-INDEX: 109; LEFT: 459px; POSITION: absolute; TOP: 274px" runat="server" Width="231px"></asp:Label> <asp:TextBox id="tbNewMail" style="Z-INDEX: 110; LEFT: 330px; POSITION: absolute; TOP: 381px" runat="server" Width="208px" Height="26px"></asp:TextBox></FONT> </form> </body></HTML><?xml version="1.0" standalone="yes"?><dbGuest> <User> <Name>aaa</Name> <City>shanghai</City> <Email>aaa@263.net</Email> <Message>ok</Message> <STime>2004-07-12T00:00:00.0000000+08:00</STime> </User> <User> <Name>shaoazhd</Name> <City>beijing</City> <Email>sss@22.net</Email> <Message>afsa</Message> <STime>2004-7-12 15:07:39</STime> </User> <User> <Name>Guset</Name> <City>上海</City> <Email>sfaf@22.net</Email> </User> <User> <Name>Guset</Name> <City>上海</City> <Email>ss@22.net</Email> </User></dbGuest>using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;using System.Xml;using System.Xml.XPath;namespace DsAndXML.OpXMLFile{
/// <summary>
/// Main 的摘要说明。
/// </summary> public class Main : System.Web.UI.Page { protected System.Web.UI.WebControls.Button btnQuery; protected System.Web.UI.WebControls.Button btnChange; protected System.Web.UI.WebControls.Button btnDelete; protected System.Web.UI.WebControls.Button btnAdd; protected System.Web.UI.WebControls.DropDownList ddlName; protected System.Web.UI.WebControls.Label Label1; protected System.Web.UI.WebControls.Label Label2; protected System.Web.UI.WebControls.Label lbEmail; protected System.Web.UI.WebControls.TextBox tbNewMail; protected System.Web.UI.WebControls.Label Label3; protected System.Web.UI.WebControls.DataGrid dgShow; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 if(!IsPostBack) Bind(); } private void Bind() { DataSet ds = new DataSet(); ds.ReadXml(Server.MapPath(".\\db\\dbGuest.xml")); dgShow.DataSource = ds.Tables[0].DefaultView; dgShow.DataBind(); XmlDocument doc = new XmlDocument(); doc.Load(Server.MapPath(".\\db\\dbGuest.xml")); XmlNodeList elemList = doc.GetElementsByTagName("Name"); ddlName.Items.Clear(); for(int i=0;i<elemList.Count;i++) ddlName.Items.Add(elemList[i].InnerXml); }
Web Form Designer generated code private void btnQuery_Click(object sender, System.EventArgs e) { XmlDocument doc = new XmlDocument(); doc.Load(Server.MapPath(".\\db\\dbGuest.xml")); lbEmail.Text = doc.SelectSingleNode("//User[Name='"+ddlName.SelectedItem.Text+"']").ChildNodes.Item(2).InnerText; } private void btnChange_Click(object sender, System.EventArgs e) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(Server.MapPath(".\\db\\dbGuest.xml")); XmlNodeList nodeList=xmlDoc.SelectSingleNode("dbGuest").ChildNodes;//获取dbGuest节点的所有子节点 foreach(XmlNode xn in nodeList)//遍历所有子节点 { XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型 XmlNodeList node = xe.GetElementsByTagName("Name"); if(node.Count>0) { if(node[0].InnerText==ddlName.SelectedItem.Text) { XmlNodeList nls=xe.ChildNodes;//继续获取xe子节点的所有子节点 foreach(XmlNode xn1 in nls)//遍历 { XmlElement xe2=(XmlElement)xn1;//转换类型 if(xe2.Name=="Email")//如果找到 { xe2.InnerText=tbNewMail.Text;//则修改 break;//找到退出来就可以了 } } break; } } } xmlDoc.Save(Server.MapPath(".\\db\\dbGuest.xml")); Bind(); } private void btnDelete_Click(object sender, System.EventArgs e) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(Server.MapPath(".\\db\\dbGuest.xml")); XmlNodeList xnl=xmlDoc.SelectSingleNode("dbGuest").ChildNodes; foreach(XmlNode xn in xnl) { XmlElement xe=(XmlElement)xn; XmlNodeList node = xe.GetElementsByTagName("Name"); if(node.Count>0) { if(node[0].InnerText==ddlName.SelectedItem.Text) xe.RemoveAll();//删除该节点的全部内容 break; } } xmlDoc.Save(Server.MapPath(".\\db\\dbGuest.xml")); Bind(); } private void btnAdd_Click(object sender, System.EventArgs e) { XmlDocument xmlDoc = new XmlDocument(); xmlDoc.Load(Server.MapPath(".\\db\\dbGuest.xml")); XmlNode root=xmlDoc.SelectSingleNode("dbGuest");//查找<dbGuest> XmlElement xe1=xmlDoc.CreateElement("User");//创建一个<User>节点 XmlElement xesub1=xmlDoc.CreateElement("Name"); xesub1.InnerText="Guset";//设置文本节点 xe1.AppendChild(xesub1);//添加到<User>节点中 XmlElement xesub2=xmlDoc.CreateElement("City"); xesub2.InnerText="上海"; xe1.AppendChild(xesub2); XmlElement xesub3=xmlDoc.CreateElement("Email"); xesub3.InnerText="ss@22.net"; xe1.AppendChild(xesub3); root.AppendChild(xe1);//添加到<dbGuest>节点中 xmlDoc.Save(Server.MapPath(".\\db\\dbGuest.xml")); Bind(); } }
}