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使用C#对XML进行增删改查操作 (可封装)

xml文件格式

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<?xml version="1.0" encoding="utf-8"?> 
<messageList> 
  <message id="1"> 
    <Name>熊猫</Name> 
    <QQ>123456</QQ> 
    <Email>panda@qq.com</Email> 
    <Content>asfdsafasdfasdfsad我是内容</Content> 
    <Time>2009-10-1</Time> 
  </message> 
</messageList> 
<?xml version="1.0" encoding="utf-8"?>
<messageList>
  <message id="1">
    <Name>熊猫</Name>
    <QQ>123456</QQ>
    <Email>panda@qq.com</Email>
    <Content>asfdsafasdfasdfsad我是内容</Content>
    <Time>2009-10-1</Time>
  </message>
</messageList>

增加>>>>

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XmlDocument xmld = new XmlDocument();  
                xmld.Load(Server.MapPath("App_Code/Message.xml"));//加载xml文件   
                XmlNode root = xmld.SelectSingleNode("messageList");//查找messageList节点  
 
                int i = xmld.SelectSingleNode("messageList").ChildNodes.Count + 1;  
                XmlElement xml0 = xmld.CreateElement("message");  
                xml0.SetAttribute("id", i.ToString());  
 
                XmlElement xml1 = xmld.CreateElement("Name");//创建一个Name节点  
                xml1.InnerText = this.txtName.Value.Trim();  
                xml0.AppendChild(xml1);//添加  
 
                XmlElement xml2 = xmld.CreateElement("QQ");//创建QQ节点  
                xml2.InnerText = this.txtQQ.Value.Trim();  
                xml0.AppendChild(xml2);//添加  
 
                XmlElement xml3 = xmld.CreateElement("Email");//创建一个Email节点  
                xml3.InnerText = this.txtEmail.Value.Trim();  
                xml0.AppendChild(xml3);//添加  
 
                XmlElement xml4 = xmld.CreateElement("Content");//创建一个Content节点  
                xml4.InnerText = this.txtContent.Value;  
                xml0.AppendChild(xml4);//添加  
 
                XmlElement xml5 = xmld.CreateElement("Time");//创建一个Time节点  
                xml5.InnerText = DateTime.Now.ToString("yyyy-MM-dd");  
                xml0.AppendChild(xml5);//添加  
 
                root.AppendChild(xml0);  
 
                xmld.Save(Server.MapPath("App_Code/Message.xml")); 
XmlDocument xmld = new XmlDocument();
                xmld.Load(Server.MapPath("App_Code/Message.xml"));//加载xml文件
                XmlNode root = xmld.SelectSingleNode("messageList");//查找messageList节点

                int i = xmld.SelectSingleNode("messageList").ChildNodes.Count + 1;
                XmlElement xml0 = xmld.CreateElement("message");
                xml0.SetAttribute("id", i.ToString());

                XmlElement xml1 = xmld.CreateElement("Name");//创建一个Name节点
                xml1.InnerText = this.txtName.Value.Trim();
                xml0.AppendChild(xml1);//添加

                XmlElement xml2 = xmld.CreateElement("QQ");//创建QQ节点
                xml2.InnerText = this.txtQQ.Value.Trim();
                xml0.AppendChild(xml2);//添加

                XmlElement xml3 = xmld.CreateElement("Email");//创建一个Email节点
                xml3.InnerText = this.txtEmail.Value.Trim();
                xml0.AppendChild(xml3);//添加

                XmlElement xml4 = xmld.CreateElement("Content");//创建一个Content节点
                xml4.InnerText = this.txtContent.Value;
                xml0.AppendChild(xml4);//添加

                XmlElement xml5 = xmld.CreateElement("Time");//创建一个Time节点
                xml5.InnerText = DateTime.Now.ToString("yyyy-MM-dd");
                xml0.AppendChild(xml5);//添加

                root.AppendChild(xml0);

                xmld.Save(Server.MapPath("App_Code/Message.xml"));

删除>>>>

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XmlDocument xmld = new XmlDocument();  
 
       xmld.Load(Server.MapPath("App_Code/Message.xml"));  
 
       XmlNodeList list = xmld.SelectSingleNode("messageList").ChildNodes;  
 
       foreach (XmlNode var in list)  
       {  
           XmlElement xmle = (XmlElement)var;  
 
           if (xmle.GetAttribute("id") == Id)//如果ID等于文本的值就删除  
           {  
               xmle.RemoveAll();  
               xmld.Save(Server.MapPath("App_Code/Message.xml"));//删除后记得一定要保存  
               Page.ClientScript.RegisterStartupScript(GetType(), "", "alert('删除成功!!');", true);  
           }  
           else 
           {  
               Page.ClientScript.RegisterStartupScript(GetType(), "", "alert('删除失败!!');", true);  
           }  
       } 
 XmlDocument xmld = new XmlDocument();

        xmld.Load(Server.MapPath("App_Code/Message.xml"));

        XmlNodeList list = xmld.SelectSingleNode("messageList").ChildNodes;

        foreach (XmlNode var in list)
        {
            XmlElement xmle = (XmlElement)var;

            if (xmle.GetAttribute("id") == Id)//如果ID等于文本的值就删除
            {
                xmle.RemoveAll();
                xmld.Save(Server.MapPath("App_Code/Message.xml"));//删除后记得一定要保存
                Page.ClientScript.RegisterStartupScript(GetType(), "", "alert('删除成功!!');", true);
            }
            else
            {
                Page.ClientScript.RegisterStartupScript(GetType(), "", "alert('删除失败!!');", true);
            }
        }

更改>>>>

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XmlDocument xmld = new XmlDocument();  
       xmld.Load(Server.MapPath("App_Code/Message.xml"));  
 
       XmlNodeList list = xmld.SelectSingleNode("messageList").ChildNodes;  
 
       foreach (XmlNode xmln in list)  
       {  
           XmlElement xmle = (XmlElement)xmln;//格式转换  
           if (Request["ID"].Equals(xmle.GetAttribute("id")))  
           {  
               xmle.ChildNodes[0].InnerText = this.txtName.Value;  
               xmle.ChildNodes[1].InnerText = this.txtQQ.Value;  
               xmle.ChildNodes[2].InnerText = this.txtEmail.Value;  
               xmle.ChildNodes[3].InnerText = this.txtContent.Value;  
 
               xmld.Save(Server.MapPath("App_Code/Message.xml"));  
               Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('修改成功！！！');location.href='MessageList.aspx'",true);  
           }  
       } 
 XmlDocument xmld = new XmlDocument();
        xmld.Load(Server.MapPath("App_Code/Message.xml"));

        XmlNodeList list = xmld.SelectSingleNode("messageList").ChildNodes;

        foreach (XmlNode xmln in list)
        {
            XmlElement xmle = (XmlElement)xmln;//格式转换
            if (Request["ID"].Equals(xmle.GetAttribute("id")))
            {
                xmle.ChildNodes[0].InnerText = this.txtName.Value;
                xmle.ChildNodes[1].InnerText = this.txtQQ.Value;
                xmle.ChildNodes[2].InnerText = this.txtEmail.Value;
                xmle.ChildNodes[3].InnerText = this.txtContent.Value;

                xmld.Save(Server.MapPath("App_Code/Message.xml"));
                Page.ClientScript.RegisterStartupScript(this.GetType(), "", "alert('修改成功！！！');location.href='MessageList.aspx'",true);
            }
        }

查询>>>>>

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//下面的代码开始是用页面编码的方式实现的  
XmlDocument xmld = new XmlDocument();//构建xml文档  
            xmld.Load(Server.MapPath("App_Code/Message.xml"));//加载  
 
            XmlNodeList list = xmld.SelectSingleNode("messageList").ChildNodes;//获取子节点  
            if (list!=null)  
            {  
            foreach (XmlNode node in list)  
            {  
                XmlElement xmle = (XmlElement)node;//转换   
//这里到时候明天补上 

 

 

 

 

 

 

 

  //---------------------------------------------------------------------------------------------------

   XmlNodeReader reader = null;
  try
  {
   string s = "" ;
   XmlDocument doc = new XmlDocument ( ) ;
   // 装入指定的XML文档
   doc.Load ( "C:\\Documents and Settings\\Administrator\\桌面\\1.xml" ) ;
   // 设定XmlNodeReader对象来打开XML文件
   reader = new XmlNodeReader ( doc ) ;
   // 读取XML文件中的数据，并显示出来
   while ( reader.Read ( ) )
   {
    //判断当前读取得节点类型
    switch ( reader.NodeType )
    {
     case XmlNodeType.Element :
      s = reader.Name ;
      break ;
     case XmlNodeType.Text :
                        if (s.Equals("name"))
       myItem = Listview1.Items.Add ( reader.Value ) ;
      else
       myItem.SubItems.Add ( reader.Value ) ;
      break ;
    }
   }
  }
  finally
  {
   //清除打开的数据流
   if ( reader != null )
    reader.Close ( ) ;
  }
}

  //---------------------------------------------------------------------------------------------------

 

 

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/zhoukang0916/archive/2009/10/17/4684210.aspx

posted on 2009-12-14 17:02  stephen&amp;#183;周  阅读(286)  评论(0)  编辑  收藏  举报