XML 增、删、改和查示例

                <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文件dbGuest.xml
<?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#region Web Form Designer generated code

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