导 读：介绍了有关ASP.NET中XML控件的使用,有个小BUG:在WEBFORM.ASPX中出现的XML控件,其中的transformsource属性设定了样式表文件路径,可是在文章出处没有找到这个XSL文件.:( 自己解决吧. 在这个代码中揭示了微软在ASP.NET架构中隐藏的一个WEB表单控件，即
，我只给代码，不给解释，大家自己下课后去研究吧。 另外，由于是beta1，在这个控件中你使用的xslt里面不能使用，当然，亦不能使用那个order-by了，因为它支持的xsl空间是带"1999"的那个，而不是原来的那个。 另外，我从微软得到的回答就是在beta2里面，它将支持，就可以全部转向xml+xsl了，而不用再为源代码保密问题头疼了。 请看下例： webform2.cs - 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.Text; using System.IO; using System.Xml; public class WebForm2 : Page { public StringBuilder outputQ; public StringBuilder outputXml; public DocumentNavigator nav = null; public HtmlInputFile XmlFile; public System.Web.UI.WebControls.Xml MyXml; public System.Web.UI.WebControls.TextBox TextBox1; public System.Web.UI.WebControls.TextBox TextBox2; public System.Web.UI.WebControls.TextBox TextBox3; public System.Web.UI.WebControls.Button Query; public System.Web.UI.WebControls.Label FileLabel; public void On_KeyUp(object sender, System.EventArgs e) { Response.Write("Works"); } protected void Page_Load(object sender, EventArgs e) { if (!IsPostBack) { // // Evals true first time browser hits the page // } } public void Query_Click(object sender, System.EventArgs e) { HttpPostedFile xmlfile = XmlFile.PostedFile; XmlDocument doc = new XmlDocument(); MyXml.Document = new XmlDocument(); // TextBox2.Text=""; // TextBox3.Text=""; if (xmlfile.FileName != String.Empty) { try { FileLabel.Text= xmlfile.FileName; MyXml.Document.Load(xmlfile.FileName); outputXml = new StringBuilder(); XmlTextReader reader = new XmlTextReader (xmlfile.FileName); ShowDocument(); TextBox3.Text = outputXml.ToString(); outputQ = new StringBuilder(); doc.Load(xmlfile.FileName); DocumentNavigator nav = new DocumentNavigator(doc); // Perform the query e.g. "descendant::book/price" XPathQuery(nav, TextBox1.Text); TextBox2.Text = outputQ.ToString(); } catch (Exception exp) { //outputQ.Append(""+ exp.Message+""); } finally {} } else if (FileLabel.Text != String.Empty) { try { MyXml.Document.Load(FileLabel.Text); outputXml = new StringBuilder(); XmlTextReader reader = new XmlTextReader (FileLabel.Text); ShowDocument(); TextBox3.Text = outputXml.ToString(); ShowDocument(); outputQ = new StringBuilder(); doc.Load(FileLabel.Text); DocumentNavigator nav = new DocumentNavigator(doc); // Perform the query e.g. "descendant::book/price" XPathQuery(nav, TextBox1.Text); TextBox2.Text = outputQ.ToString(); } catch (Exception exp) { outputQ.Append(""+ exp.Message+""); } finally {} } } private void XPathQuery(XmlNavigator navigator, String xpathexpr ) { try { // Save context node position navigator.PushPosition(); navigator.Select (xpathexpr); FormatXml(navigator); // Restore context node position navigator.PopPosition(); } catch (Exception e) { } } //***************************** Navigator ************************************ private void FormatXml (XmlNavigator navigator) { while (navigator.MoveToNextSelected()) { switch (navigator.NodeType) { case XmlNodeType.ProcessingInstruction: Format (navigator, "ProcessingInstruction"); break; case XmlNodeType.DocumentType: Format (navigator, "DocumentType"); break; case XmlNodeType.Document: Format (navigator, "Document"); break; case XmlNodeType.Comment: Format (navigator, "Comment"); break; case XmlNodeType.Element: Format (navigator, "Element"); break; case XmlNodeType.Text: Format (navigator, "Text"); break; case XmlNodeType.Whitespace: Format (navigator, "Whitespace"); break; } } outputQ.Append("\r\n"); } // Format the output private void Format (XmlNavigator navigator, String NodeType) { String value = String.Empty; String name = String.Empty; if (navigator.HasChildren) { name = navigator.Name; navigator.MoveToFirstChild(); if (navigator.HasValue) { value = navigator.Value; } } else { if (navigator.HasValue) { value = navigator.Value; name = navigator.Name; } } outputQ.Append(NodeType + "<" + name + ">" + value); outputQ.Append("\r\n"); } // ********************************** XmlReader ***************************** public void ShowDocument () { outputXml = new StringBuilder(); XmlTextReader reader = new XmlTextReader (FileLabel.Text); while (reader.Read()) { switch (reader.NodeType) { case XmlNodeType.ProcessingInstruction: Format (reader, "ProcessingInstruction"); break; case XmlNodeType.DocumentType: Format (reader, "DocumentType"); break; case XmlNodeType.Comment: Format (reader, "Comment"); break; case XmlNodeType.Element: Format (reader, "Element"); break; case XmlNodeType.Text: Format (reader, "Text"); break; case XmlNodeType.Whitespace: break; } } TextBox3.Text = outputXml.ToString(); } protected void Format(XmlReader reader, String NodeType) { // Format the output for (int i=0; i < reader.Depth; i++) { outputXml.Append('\t'); } outputXml.Append(reader.Prefix + NodeType + "<" + reader.Name + ">" + reader.Value); // Display the attributes values for the current node if (reader.HasAttributes) { outputXml.Append(" Attributes:"); for (int j=0; j < reader.AttributeCount; j++) { outputXml.Append(reader[j]); } } outputXml.Append("\r\n"); } /// ************************* DOM ********************************* protected void ShowDocument(XmlNode node) { if (node != null) Format (node); if (node.HasChildNodes) { node = node.FirstChild; while (node != null) { ShowDocument(node); node = node.NextSibling; } } } // Format the output private void Format (XmlNode node) { if (!node.HasChildNodes) { outputXml.Append("\t" + "<" + node.Value + ">"); } else { outputXml.Append("<" + node.Name + ">"); if (XmlNodeType.Element == node.NodeType) { XmlNamedNodeMap map = node.Attributes; foreach (XmlNode attrnode in map) outputXml.Append(" " + attrnode.Name + "<" + attrnode.Value + "> "); } outputXml.Append("\r\n"); } } } 下面就是webform2.aspx了 webform2.aspx --- <%@ import="" namespace="System"> <%@ import="" namespace="System.IO"> <%@ assembly="" name="System.Xml"> <%@ import="" namespace="System.Xml"> <%@ page="" language="C#" inherits="WebForm2" src="WebForm2.cs" debug="true">