XML 增、删、改和查示例_XHTML/WEB_黑客防线网安服务器维护基地--Powered by WWW.RONGSEN.COM.CN

XML 增、删、改和查示例

作者:黑客防线网安XML教程基地 来源:黑客防线网安XML教程基地 浏览次数:0

本篇关键词: 节点genrerunat
黑客防线网安网讯:  1.已知有一个XML文件(bookstore.xml)如下:      <?xml version="1.0" encoding="gb2312"?>  <bookstore>    <book genre="fantasy" ISBN="2-3631-4">      <title>Oberon&...

  1.已知有一个XML文件(bookstore.xml)如下:

  
   <?xml version="1.0" encoding="gb2312"?>
  <bookstore>
    <book genre="fantasy" ISBN="2-3631-4">
      <title>Oberon's Legacy</title>
      <author>Corets, Eva</author>
      <price>5.95</price>
    </book>
  </bookstore>

   

   

   
    1、往<bookstore>节点中插入一个<book>节点:

   

  
      XmlDocument xmlDoc=new XmlDocument();
     xmlDoc.Load("bookstore.xml");
     XmlNode root=xmlDoc.SelectSingleNode("bookstore");//查找<bookstore>
     XmlElement xe1=xmlDoc.CreateElement("book");//创建一个<book>节点
     xe1.SetAttribute("genre","李赞红");//设置该节点genre属性
     xe1.SetAttribute("ISBN","2-3631-4");//设置该节点ISBN属性
   
     XmlElement xesub1=xmlDoc.CreateElement("title");
     xesub1.InnerText="CS从入门到精通";//设置文本节点
     xe1.AppendChild(xesub1);//添加到<book>节点中
     XmlElement xesub2=xmlDoc.CreateElement("author");
     xesub2.InnerText="候捷";
     xe1.AppendChild(xesub2);
     XmlElement xesub3=xmlDoc.CreateElement("price");
     xesub3.InnerText="58.3";
     xe1.AppendChild(xesub3);
   
     root.AppendChild(xe1);//添加到<bookstore>节点中
     xmlDoc.Save("bookstore.xml");

   

   

    //================
    结果为:

   

  
   <?xml version="1.0" encoding="gb2312"?>
  <bookstore>
    <book genre="fantasy" ISBN="2-3631-4">
      <title>Oberon's Legacy</title>
      <author>Corets, Eva</author>
      <price>5.95</price>
    </book>
    <book genre="李赞红" ISBN="2-3631-4">
      <title>CS从入门到精通</title>
      <author>候捷</author>
      <price>58.3</price>
    </book>
  </bookstore>

   

   

  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
     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
      if(xe.GetAttribute("genre")=="李赞红")//如果genre属性值为“李赞红”
      {
       xe.SetAttribute("genre","update李赞红");//则修改该属性为“update李赞红”
   
       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=="author")//如果找到
        {
         xe2.InnerText="亚胜";//则修改
         break;//找到退出来就可以了
        }
       }
       break;
      }
     }
   
     xmlDoc.Save("bookstore.xml");//保存

   

  
    //=================

    最后结果为:

  
   <?xml version="1.0" encoding="gb2312"?>
  <bookstore>
    <book genre="fantasy" ISBN="2-3631-4">
      <title>Oberon's Legacy</title>
      <author>Corets, Eva</author>
      <price>5.95</price>
    </book>
    <book genre="update李赞红" ISBN="2-3631-4">
      <title>CS从入门到精通</title>
      <author>亚胜</author>
      <price>58.3</price>
    </book>
  </bookstore>

   

   
    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;
   
     foreach(XmlNode xn in xnl)
     {
      XmlElement xe=(XmlElement)xn;
   

   

   

   

   

       if(xe.GetAttribute("genre")=="fantasy")
      {
       xe.RemoveAttribute("genre");//删除genre属性
      }
      else if(xe.GetAttribute("genre")=="update李赞红")
      {
       xe.RemoveAll();//删除该节点的全部内容
      }
     }
     xmlDoc.Save("bookstore.xml");

   

    //====================
   
    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");
   
     XmlNodeList xnl=xn.ChildNodes;
    
     foreach(XmlNode xnf in xnl)
     {
      XmlElement xe=(XmlElement)xnf;
      Console.WriteLine(xe.GetAttribute("genre"));//显示属性值
      Console.WriteLine(xe.GetAttribute("ISBN"));
   
      XmlNodeList xnf1=xe.ChildNodes;
      foreach(XmlNode xn2 in xnf1)
      {
       Console.WriteLine(xn2.InnerText);//显示子节点点文本
      }
     }
   

  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(".dbdbGuest.xml"));
              dgShow.DataSource = ds.Tables[0].DefaultView;
              dgShow.DataBind();
              XmlDocument doc = new XmlDocument();
              doc.Load(Server.MapPath(".dbdbGuest.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
          override protected void OnInit(EventArgs e)
          {
              //
              // CODEGEN:该调用是 ASP.NET Web 窗体设计器所必需的。
              //
              InitializeComponent();
              base.OnInit(e);
          }
         
          /**//// <summary>
          /// 设计器支持所需的方法 - 不要使用代码编辑器修改
          /// 此方法的内容。
          /// </summary>
          private void InitializeComponent()
          {   
              this.btnQuery.Click += new System.EventHandler(this.btnQuery_Click);
              this.btnChange.Click += new System.EventHandler(this.btnChange_Click);
              this.btnDelete.Click += new System.EventHandler(this.btnDelete_Click);
              this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
              this.Load += new System.EventHandler(this.Page_Load);

          }
          #endregion

          private void btnQuery_Click(object sender, System.EventArgs e)
          {
              XmlDocument doc = new XmlDocument();
              doc.Load(Server.MapPath(".dbdbGuest.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(".dbdbGuest.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(".dbdbGuest.xml"));
              Bind();
          }

          private void btnDelete_Click(object sender, System.EventArgs e)
          {
              XmlDocument xmlDoc = new XmlDocument();
              xmlDoc.Load(Server.MapPath(".dbdbGuest.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(".dbdbGuest.xml"));
              Bind();
          }

          private void btnAdd_Click(object sender, System.EventArgs e)
          {
              XmlDocument xmlDoc = new XmlDocument();
              xmlDoc.Load(Server.MapPath(".dbdbGuest.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(".dbdbGuest.xml"));
              Bind();
          }
      }
  }
  http://www.cnblogs.com/skylaugh/archive/2006/12/18/595634.html

    黑客防线网安服务器维护方案本篇连接:http://www.rongsen.com.cn/show-15921-1.html
网站维护教程更新时间:2012-04-06 01:01:39  【打印此页】  【关闭
我要申请本站N点 | 黑客防线官网 |  
专业服务器维护及网站维护手工安全搭建环境,网站安全加固服务。黑客防线网安服务器维护基地招商进行中!QQ:29769479

footer  footer  footer  footer