XML transformation with extension

<%--
Code Revised from
       
Professional ASP.NET 2.0 XML (Programmer to Programmer) (Paperback)
by Thiru Thangarathinam 

# Publisher: Wrox (January 18, 2006)
# Language: English
# ISBN: 0764596772
--%>       
       
       
       
<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml" %>
<%@ Import Namespace="System.Xml.Xsl" %>
<%@ Import Namespace="System.Xml.XPath" %>

<script runat="server"> 
public class Discount
{
  public Discount()
  {
  }

    public string ReturnDiscount(string price)
    {
        decimal priceValue = Convert.ToDecimal(price);
        return (priceValue * 15 / 100).ToString();
    }

}
               
    void Page_Load(object sender, System.EventArgs e)
  {
        string xmlPath = MapPath("BooksWithStyle.xml");
        string xslPath = MapPath("Books_with_extensions.xsl");      
      XPathDocument xpathDoc = new XPathDocument(xmlPath);      
        XslCompiledTransform transform = new XslCompiledTransform();
        XsltArgumentList argsList = new XsltArgumentList();
        Discount obj = new Discount();
        argsList.AddExtensionObject("urn:myDiscount", obj);
        //Load the XSL stylsheet into the XslCompiledTransform object
        transform.Load(xslPath);                
        transform.Transform(xpathDoc, argsList, Response.Output);            
    }        
</script>

<%--
<?xml version='1.0'?>
<bookstore>
  <book genre="A">
    <title>title 1</title>
    <author>
      <first-name>A</first-name>
      <last-name>B</last-name>
    </author>
    <price>99.99</price>
  </book>
  <book genre="B">
    <title>title 2</title>
    <author>
      <first-name>B</first-name>
      <last-name>C</last-name>
    </author>
    <price>11.99</price>
  </book>
</bookstore>

--%>

<%--
<?xml version="1.0"?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:myDiscount="urn:myDiscount">
  <xsl:output method="html" />  
  <xsl:template match="/">
    <html>
      <title>XSL Transformation</title>
      <body>
        <h2>My Book Collection</h2>
        <table border="1">
          <tr bgcolor="#9acd32">
            <th align="left">Title</th>
            <th align="left">Price</th>
            <th align="left">Calculated Discount</th>
          </tr>
          <xsl:for-each select="bookstore/book">
            <tr>
              <td>
                <xsl:value-of select="title"/>
              </td>
              <td>
                <xsl:value-of select="price"/>
              </td>
              <td>
                <xsl:value-of select="myDiscount:ReturnDiscount(price)" />                
              </td>
            </tr>
          </xsl:for-each>
        </table>
      </body>
    </html>
  </xsl:template>
</xsl:stylesheet>
--%>

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XML transformation with extension : Transform « XML « ASP.Net

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