1.已知有一个XML文件（bookstore.xml）如下：
1、往
XmlDocument xmlDoc=new XmlDocument();
xmlDoc.Load("bookstore.xml");
XmlNode root=xmlDoc.SelectSingleNode("bookstore");//查找
XmlElement xe1=xmlDoc.CreateElement("book");//创建一个
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
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
xmlDoc.Save("bookstore.xml");
//================
结果为：
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
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：
3、删除
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：
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
<%
@Pagelanguage="c#"Codebehind="Main.aspx.cs"AutoEventWireup="false"Inherits="DsAndXML.OpXMLFile.Main"%>
DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.0Transitional//EN"><HTML><HEAD><title>Maintitle><metaname="GENERATOR"Content="MicrosoftVisualStudio7.0"><metaname="CODE_LANGUAGE"Content="C#"><metaname="vs_defaultClientScript"content="JavaScript"><metaname="vs_targetSchema"content="http://schemas.microsoft.com/intellisense/ie5">HEAD><bodyMS_POSITIONING="GridLayout"><formid="Main"method="post"runat="server"><FONTface="宋体"><asp:DataGridid="dgShow"style="Z-INDEX:100;LEFT:113px;POSITION:absolute;TOP:32px"runat="server"Width="480px"Height="178px">asp:DataGrid><asp:Labelid="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:Labelid="Label2"style="Z-INDEX:107;LEFT:333px;POSITION:absolute;TOP:274px"runat="server"Width="83px"Height="21px">邮件地址：asp:Label><asp:Buttonid="btnAdd"style="Z-INDEX:104;LEFT:298px;POSITION:absolute;TOP:324px"runat="server"Text="添加">asp:Button><asp:Buttonid="btnDelete"style="Z-INDEX:103;LEFT:199px;POSITION:absolute;TOP:324px"runat="server"Text="删除">asp:Button><asp:Buttonid="btnChange"style="Z-INDEX:102;LEFT:102px;POSITION:absolute;TOP:382px"runat="server"Text="修改">asp:Button><asp:Buttonid="btnQuery"style="Z-INDEX:101;LEFT:101px;POSITION:absolute;TOP:324px"runat="server"Text="查询">asp:Button><asp:DropDownListid="ddlName"style="Z-INDEX:105;LEFT:210px;POSITION:absolute;TOP:274px"runat="server"Width="95px"Height="78px">asp:DropDownList><asp:Labelid="Label1"style="Z-INDEX:106;LEFT:100px;POSITION:absolute;TOP:274px"runat="server"Width="83px"Height="21px">姓名：asp:Label><asp:Labelid="lbEmail"style="Z-INDEX:109;LEFT:459px;POSITION:absolute;TOP:274px"runat="server"Width="231px">asp:Label><asp:TextBoxid="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.xmlxmlversion="1.0"standalone="yes"?><dbGuest><User><Name>aaaName><City>shanghaiCity><Email>aaa@263.netEmail><Message>okMessage><STime>2004-07-12T00:00:00.0000000+08:00STime>User><User><Name>shaoazhdName><City>beijingCity><Email>sss@22.netEmail><Message>afsaMessage><STime>2004-7-1215:07:39STime>User><User><Name>GusetName><City>上海City><Email>sfaf@22.netEmail>User><User><Name>GusetName><City>上海City><Email>ss@22.netEmail>User>dbGuest>
usingSystem;usingSystem.Collections;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Web;usingSystem.Web.SessionState;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web.UI.HtmlControls;usingSystem.Xml;usingSystem.Xml.XPath;namespaceDsAndXML.OpXMLFile{
/**////
///Main的摘要说明。
///publicclassMain:System.Web.UI.Page{protectedSystem.Web.UI.WebControls.ButtonbtnQuery;protectedSystem.Web.UI.WebControls.ButtonbtnChange;protectedSystem.Web.UI.WebControls.ButtonbtnDelete;protectedSystem.Web.UI.WebControls.ButtonbtnAdd;protectedSystem.Web.UI.WebControls.DropDownListddlName;protectedSystem.Web.UI.WebControls.LabelLabel1;protectedSystem.Web.UI.WebControls.LabelLabel2;protectedSystem.Web.UI.WebControls.LabellbEmail;protectedSystem.Web.UI.WebControls.TextBoxtbNewMail;protectedSystem.Web.UI.WebControls.LabelLabel3;protectedSystem.Web.UI.WebControls.DataGriddgShow;privatevoidPage_Load(objectsender,System.EventArgse){//在此处放置用户代码以初始化页面if(!IsPostBack)Bind();}privatevoidBind(){DataSetds=newDataSet();ds.ReadXml(Server.MapPath(".dbdbGuest.xml"));dgShow.DataSource=ds.Tables[0].DefaultView;dgShow.DataBind();XmlDocumentdoc=newXmlDocument();doc.Load(Server.MapPath(".dbdbGuest.xml"));XmlNodeListelemList=doc.GetElementsByTagName("Name");ddlName.Items.Clear();for(inti=0;i<elemList.Count;i++)ddlName.Items.Add(elemList[i].InnerXml);}WebFormDesignergeneratedcode#regionWebFormDesignergeneratedcodeoverrideprotectedvoidOnInit(EventArgse){////CODEGEN：该调用是ASP.NETWeb窗体设计器所必需的。//InitializeComponent();base.OnInit(e);}/**///////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。///privatevoidInitializeComponent(){this.btnQuery.Click+=newSystem.EventHandler(this.btnQuery_Click);this.btnChange.Click+=newSystem.EventHandler(this.btnChange_Click);this.btnDelete.Click+=newSystem.EventHandler(this.btnDelete_Click);this.btnAdd.Click+=newSystem.EventHandler(this.btnAdd_Click);this.Load+=newSystem.EventHandler(this.Page_Load);}#endregionprivatevoidbtnQuery_Click(objectsender,System.EventArgse){XmlDocumentdoc=newXmlDocument();doc.Load(Server.MapPath(".dbdbGuest.xml"));lbEmail.Text=doc.SelectSingleNode("//User[Name='"+ddlName.SelectedItem.Text+"']").ChildNodes.Item(2).InnerText;}privatevoidbtnChange_Click(objectsender,System.EventArgse){XmlDocumentxmlDoc=newXmlDocument();xmlDoc.Load(Server.MapPath(".dbdbGuest.xml"));XmlNodeListnodeList=xmlDoc.SelectSingleNode("dbGuest").ChildNodes;//获取dbGuest节点的所有子节点foreach(XmlNodexninnodeList)//遍历所有子节点{XmlElementxe=(XmlElement)xn;//将子节点类型转换为XmlElement类型XmlNodeListnode=xe.GetElementsByTagName("Name");if(node.Count>0){if(node[0].InnerText==
