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
<%@Pagelanguage="c#"Codebehind="Main.aspx.cs"AutoEventWireup="false"Inherits="DsAndXML.OpXMLFile.Main"%>
<!DOCTYPEHTMLPUBLIC"-//W3C//DTDHTML4.0Transitional//EN">
<HTML>
<HEAD>
<title>Main</title>
<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.xml
<?xmlversion="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>2004-7-1215:07:39</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>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
{
///<summary>
///Main的摘要说明。
///</summary>
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(".\\db\\dbGuest.xml"));
dgShow.DataSource=ds.Tables[0].DefaultView;
dgShow.DataBind();
XmlDocumentdoc=newXmlDocument();
doc.Load(Server.MapPath(".\\db\\dbGuest.xml"));
XmlNodeListelemList=doc.GetElementsByTagName("Name");
ddlName.Items.Clear();
for(inti=0;i<elemList.Count;i++)
ddlName.Items.Add(elemList[i].InnerXml);
}
WebFormDesignergeneratedcode#regionWebFormDesignergeneratedcode
overrideprotectedvoidOnInit(EventArgse)
{
//
//CODEGEN:该调用是ASP.NETWeb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>
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);
}
#endregion
privatevoidbtnQuery_Click(objectsender,System.EventArgse)
{
XmlDocumentdoc=newXmlDocument();
doc.Load(Server.MapPath(".\\db\\dbGuest.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(".\\db\\dbGuest.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==ddlName.SelectedItem.Text)
{
XmlNodeListnls=xe.ChildNodes;//继续获取xe子节点的所有子节点
foreach(XmlNodexn1innls)//遍历
{
XmlElementxe2=(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();
}
privatevoidbtnDelete_Click(objectsender,System.EventArgse)
{
XmlDocumentxmlDoc=newXmlDocument();
xmlDoc.Load(Server.MapPath(".\\db\\dbGuest.xml"));
XmlNodeListxnl=xmlDoc.SelectSingleNode("dbGuest").ChildNodes;
foreach(XmlNodexninxnl)
{
XmlElementxe=(XmlElement)xn;
XmlNodeListnode=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();
}
privatevoidbtnAdd_Click(objectsender,System.EventArgse)
{
XmlDocumentxmlDoc=newXmlDocument();
xmlDoc.Load(Server.MapPath(".\\db\\dbGuest.xml"));
XmlNoderoot=xmlDoc.SelectSingleNode("dbGuest");//查找<dbGuest>
XmlElementxe1=xmlDoc.CreateElement("User");//创建一个<User>节点
XmlElementxesub1=xmlDoc.CreateElement("Name");
xesub1.InnerText="Guset";//设置文本节点
xe1.AppendChild(xesub1);//添加到<User>节点中
XmlElementxesub2=xmlDoc.CreateElement("City");
xesub2.InnerText="上海";
xe1.AppendChild(xesub2);
XmlElementxesub3=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();
}
}
}