ASP.NET中常用功能代码总结(6)——XML文件操作篇
整理:Terrylee
一.写入XML文件
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/// <summary>
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/// 写入XML文件
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/// </summary>
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private void WriteXML()
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{
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/// 创建一个表示所要生成的XML文件路径的字符串。如果该路径指向NTFS分区,则需要相关的访问权限。
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string filename = XMLFilePathTextBox.Text;
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/// 创建一个写入XML数据的文件流
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System.IO.FileStream myFileStream = new System.IO.FileStream(filename, System.IO.FileMode.Create);
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/// 使用文件流对象创建一个XmlTextWriter对象
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XmlTextWriter myXmlWriter = new XmlTextWriter(myFileStream, System.Text.Encoding.Unicode);
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myXmlWriter.Formatting = Formatting.Indented;
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try
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{
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/// 使用WriteXMLbyXmlWriter方法把数据写入XmlTextWriter对象中
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WriteXMLbyXmlWriter(myXmlWriter, "MSFT", 74.5, 5.5, 49020000);
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/// 通过Close方法的调用,XmlTextWriter对象的数据最终写入XML文件
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myXmlWriter.Close();
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Page.Response.Write("生成XML文档成功!");
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}
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catch
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{
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Page.Response.Write("生成XML文档失败!请检查路径是否正确,以及是否有写入权限。");
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}
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}
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private void WriteXMLbyXmlWriter(XmlWriter writer, string symbol, double price, double change, long volume)
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{
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writer.WriteStartElement("Stock");
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writer.WriteAttributeString("Symbol", symbol);
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writer.WriteElementString("Price", XmlConvert.ToString(price));
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writer.WriteElementString("Change", XmlConvert.ToString(change));
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writer.WriteElementString("Volume", XmlConvert.ToString(volume));
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writer.WriteEndElement();
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}
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二.通过DOM读取XML文件
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/// <summary>
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/// 通过DOM读取XML文件
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/// </summary>
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private void ReadXMLbyDOM()
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{
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/// 创建XmlDocument类的实例
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XmlDocument doc = new XmlDocument();
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ArrayList NodeValues = new ArrayList();
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/// 把people.xml文件读入内存,形成一个DOM结构
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doc.Load( Server.MapPath("people.xml") );
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XmlNode root = doc.DocumentElement;
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foreach( XmlNode personElement in root.ChildNodes )
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NodeValues.Add(personElement.FirstChild.Value);
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XMLNodeListBox.DataSource = NodeValues;
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XMLNodeListBox.DataBind();
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}
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三.通过XMLReader读取XML文件
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/// <summary>
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/// 通过XMLReader读取XML文件
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/// </summary>
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private void ReadXMLbyXmlReader()
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{
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///创建XML读取器
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XmlTextReader reader = new XmlTextReader( Server.MapPath("students.xml") );
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ArrayList NodeValues = new ArrayList();
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while( reader.Read() )
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{
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if( reader.NodeType == XmlNodeType.Element && reader.Name == "NAME" )
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{
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reader.Read();
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NodeValues.Add( reader.Value );
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}
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}
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XMLNodeListBox.DataSource = NodeValues;
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XMLNodeListBox.DataBind();
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}
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四.通过Xpath读取XML文件
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/// <summary>
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/// 通过Xpath读取XML文件
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/// </summary>
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private void ReadXMLbyXpath()
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{
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///注意:需要引入System.XML.XPath命名空间
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XPathDocument xpdoc = new XPathDocument( Server.MapPath("people.xml") );
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XPathNavigator nav = xpdoc.CreateNavigator();
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XPathExpression expr = nav.Compile("descendant::PEOPLE/PERSON");
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XPathNodeIterator iterator = nav.Select(expr);
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ArrayList NodeValues = new ArrayList();
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while (iterator.MoveNext())
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NodeValues.Add(iterator.Current.ToString());
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XMLNodeListBox.DataSource = NodeValues;
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XMLNodeListBox.DataBind();
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}
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五.通过XSL显示XML文件
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/// <summary>
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/// 通过XSL显示XML文件
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/// </summary>
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private void DisplayXML()
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{
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System.Xml.XmlDocument xmldoc = new System.Xml.XmlDocument();
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xmldoc.Load(Server.MapPath("user.xml"));
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System.Xml.Xsl.XslTransform xmltrans = new System.Xml.Xsl.XslTransform();
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xmltrans.Load(Server.MapPath("user.xsl"));
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Xml1.Document = xmldoc;
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Xml1.Transform = xmltrans;
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}
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六.验证XML文件
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