ASP.NET中的XML表单控件

  1<asp:xml runat="server/">，我只给代码，不给解释，大家自己下课后去研究吧。   
  2另外，由于是beta1，在这个控件中你使用的xslt里面不能使用<xsl:sort>，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。   
  3另外，我从微软得到的回答就是在beta2里面，它将支持<xsl:sort>，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。   
  4请看下例：   
  5webform2.cs   
  6\-   
  7using System;   
  8using System.Collections;   
  9using System.ComponentModel;   
 10using System.Data;   
 11using System.Drawing;   
 12using System.Web;   
 13using System.Web.SessionState;   
 14using System.Web.UI;   
 15using System.Web.UI.WebControls;   
 16using System.Web.UI.HtmlControls;   
 17using System.Text;   
 18using System.IO;   
 19using System.Xml; 
 20
 21public class WebForm2 : Page   
 22{   
 23public StringBuilder outputQ;   
 24public StringBuilder outputXml;   
 25public DocumentNavigator nav = null;   
 26public HtmlInputFile XmlFile;   
 27  
 28public System.Web.UI.WebControls.Xml MyXml; 
 29
 30public System.Web.UI.WebControls.TextBox TextBox1;   
 31public System.Web.UI.WebControls.TextBox TextBox2;   
 32public System.Web.UI.WebControls.TextBox TextBox3;   
 33public System.Web.UI.WebControls.Button Query;   
 34public System.Web.UI.WebControls.Label FileLabel;   
 35  
 36public void On_KeyUp(object sender, System.EventArgs e)   
 37{   
 38Response.Write("Works");   
 39} 
 40
 41protected void Page_Load(object sender, EventArgs e)   
 42{   
 43if (!IsPostBack)   
 44{   
 45//   
 46// Evals true first time browser hits the page   
 47//   
 48}   
 49} 
 50
 51public void Query_Click(object sender, System.EventArgs e)   
 52{   
 53HttpPostedFile xmlfile = XmlFile.PostedFile;   
 54XmlDocument doc = new XmlDocument();   
 55MyXml.Document = new XmlDocument();   
 56// TextBox2.Text="";   
 57// TextBox3.Text=""; 
 58
 59if (xmlfile.FileName != String.Empty)   
 60{   
 61try   
 62{   
 63FileLabel.Text= xmlfile.FileName; 
 64
 65MyXml.Document.Load(xmlfile.FileName);   
 66outputXml = new StringBuilder();   
 67XmlTextReader reader = new XmlTextReader (xmlfile.FileName);   
 68ShowDocument();   
 69TextBox3.Text = outputXml.ToString(); 
 70
 71outputQ = new StringBuilder();   
 72doc.Load(xmlfile.FileName);   
 73DocumentNavigator nav = new DocumentNavigator(doc);   
 74// Perform the query e.g. "descendant::book/price"   
 75XPathQuery(nav, TextBox1.Text);   
 76TextBox2.Text = outputQ.ToString(); 
 77
 78}   
 79catch (Exception exp) {   
 80//outputQ.Append("<font color='\"#FF6600\"'>"+ exp.Message+"</font><xmp>");   
 81}   
 82finally {}   
 83}   
 84else if (FileLabel.Text != String.Empty)   
 85{   
 86try   
 87{   
 88MyXml.Document.Load(FileLabel.Text);   
 89outputXml = new StringBuilder();   
 90XmlTextReader reader = new XmlTextReader (FileLabel.Text);   
 91ShowDocument();   
 92TextBox3.Text = outputXml.ToString(); 
 93
 94ShowDocument(); 
 95
 96outputQ = new StringBuilder();   
 97doc.Load(FileLabel.Text);   
 98DocumentNavigator nav = new DocumentNavigator(doc);   
 99// Perform the query e.g. "descendant::book/price"   
100XPathQuery(nav, TextBox1.Text);   
101TextBox2.Text = outputQ.ToString(); 
102
103}   
104catch (Exception exp) {   
105outputQ.Append("</xmp><font color='\"#FF6600\"'>"+ exp.Message+"</font><xmp>");   
106}   
107finally {}   
108}   
109} 
110
111private void XPathQuery(XmlNavigator navigator, String xpathexpr )   
112{   
113try   
114{   
115// Save context node position   
116navigator.PushPosition();   
117navigator.Select (xpathexpr);   
118FormatXml(navigator); 
119
120// Restore context node position   
121navigator.PopPosition();   
122}   
123catch (Exception e)   
124{   
125}   
126}   
127  
128//***************************** Navigator ************************************   
129private void FormatXml (XmlNavigator navigator)   
130{   
131while (navigator.MoveToNextSelected())   
132{   
133switch (navigator.NodeType)   
134{   
135case XmlNodeType.ProcessingInstruction:   
136Format (navigator, "ProcessingInstruction");   
137break;   
138case XmlNodeType.DocumentType:   
139Format (navigator, "DocumentType");   
140break;   
141case XmlNodeType.Document:   
142Format (navigator, "Document");   
143break;   
144case XmlNodeType.Comment:   
145Format (navigator, "Comment");   
146break;   
147case XmlNodeType.Element:   
148Format (navigator, "Element");   
149break;   
150case XmlNodeType.Text:   
151Format (navigator, "Text");   
152break;   
153case XmlNodeType.Whitespace:   
154Format (navigator, "Whitespace");   
155break;   
156}   
157}   
158outputQ.Append("\r\n");   
159} 
160
161// Format the output   
162private void Format (XmlNavigator navigator, String NodeType)   
163{   
164String value = String.Empty;   
165String name = String.Empty; 
166
167if (navigator.HasChildren)   
168{   
169name = navigator.Name;   
170navigator.MoveToFirstChild();   
171if (navigator.HasValue)   
172{   
173value = navigator.Value;   
174}   
175}   
176else   
177{   
178if (navigator.HasValue)   
179{   
180value = navigator.Value;   
181name = navigator.Name;   
182}   
183}   
184outputQ.Append(NodeType + "&lt;" + name + "&gt;" + value);   
185outputQ.Append("\r\n");   
186} 
187
188// ********************************** XmlReader *****************************   
189public void ShowDocument ()   
190{   
191outputXml = new StringBuilder();   
192XmlTextReader reader = new XmlTextReader (FileLabel.Text); 
193
194while (reader.Read())   
195{   
196switch (reader.NodeType)   
197{   
198case XmlNodeType.ProcessingInstruction:   
199Format (reader, "ProcessingInstruction");   
200break;   
201case XmlNodeType.DocumentType:   
202Format (reader, "DocumentType");   
203break;   
204case XmlNodeType.Comment:   
205Format (reader, "Comment");   
206break;   
207case XmlNodeType.Element:   
208Format (reader, "Element");   
209break;   
210case XmlNodeType.Text:   
211Format (reader, "Text");   
212break;   
213case XmlNodeType.Whitespace:   
214break;   
215}   
216}   
217TextBox3.Text = outputXml.ToString();   
218} 
219
220protected void Format(XmlReader reader, String NodeType)   
221{   
222// Format the output   
223for (int i=0; i &lt; reader.Depth; i++)   
224{   
225outputXml.Append('\t');   
226} 
227
228outputXml.Append(reader.Prefix + NodeType + "&lt;" + reader.Name + "&gt;" + reader.Value); 
229
230// Display the attributes values for the current node   
231if (reader.HasAttributes)   
232{   
233outputXml.Append(" Attributes:"); 
234
235for (int j=0; j &lt; reader.AttributeCount; j++)   
236{   
237outputXml.Append(reader[j]);   
238}   
239}   
240outputXml.Append("\r\n");   
241} 
242
243/// ************************* DOM *********************************   
244protected void ShowDocument(XmlNode node)   
245{   
246if (node != null)   
247Format (node); 
248
249if (node.HasChildNodes)   
250{   
251node = node.FirstChild;   
252while (node != null)   
253{   
254ShowDocument(node);   
255node = node.NextSibling;   
256}   
257}   
258} 
259
260// Format the output   
261private void Format (XmlNode node)   
262{   
263if (!node.HasChildNodes)   
264{   
265outputXml.Append("\t" + "&lt;" + node.Value + "&gt;");   
266} 
267
268else   
269{   
270outputXml.Append("&lt;" + node.Name + "&gt;");   
271if (XmlNodeType.Element == node.NodeType)   
272{   
273XmlNamedNodeMap map = node.Attributes;   
274foreach (XmlNode attrnode in map)   
275outputXml.Append(" " + attrnode.Name + "&lt;" + attrnode.Value + "&gt; ");   
276}   
277outputXml.Append("\r\n");   
278}   
279}   
280} 
281
282  
283下面就是webform2.aspx了   
284webform2.aspx   
285\---   

 1
 2<html><head>
 3<script language="C#" runat="server">   
 4// Put page script here   
 5public void On_KeyUp(object sender, System.EventArgs e)   
 6{   
 7Response.Write("Works");   
 8} 
 9
10</script>
11<!--<link REL="STYLESHEET" HREF="default.css" TYPE="text/css">\-->
12<title>test</title>
13</head>
14<body>
15<form action="WebForm2.aspx" enctype="multipart/form-data" method="post" runat="server">
16<div align="left">
17<table>
18<tr>
19<td>XML Document:</td>
20<td><input id="XmlFile" runat="server" type="file"/> FileName:</td>
21<td><asp:label id="FileLabel" runat="server"></asp:label></td>
22</tr>
23<tr>
24<td>XPath Expression</td>
25<td><asp:textbox height="20" id="TextBox1" onkey_up="On_KeyUp" runat="server" text=".//text()" width="300"></asp:textbox></td>
26<td><asp:button height="20" onclick="Query_Click" runat="server" text="Query" type="submit" width="91"></asp:button></td>
27</tr>
28</table>
29
30<table>
31<tr><td>Output from Query</td><td>XML Data</td><tr>
32<tr><td>Query Display: <asp:dropdownlist runat="server">
33<asp:listitem>Descriptive</asp:listitem>
34<asp:listitem>XML</asp:listitem>
35</asp:dropdownlist>
36</td><tr>
37<tr>
38<td align="left" valign="top" width="50%"><asp:textbox height="400" id="TextBox2" rows="10" runat="server" textmode="MultiLine" width="350"></asp:textbox></td>
39<td align="left" valign="top" width="50%"><asp:xml id="MyXml" runat="server/" transformsource="test.xsl"></asp:xml></td>
40</tr>
41</tr></tr></tr></tr></table>
42</div>
43<td><asp:textbox height="1" id="TextBox3" rows="110" runat="server" textmode="MultiLine" width="5"></asp:textbox></td>
44</form>
45</body>
46</html></xmp></xsl:sort></xsl:sort></asp:xml>