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<%@ Page Language="C#" %>
<%@ Import Namespace="System.Xml.Xsl" %>
<script runat="server">
protected void bookSource_Transforming(object sender, EventArgs e)
{
int discountPercentage = 10;
XsltArgumentList argList = new XsltArgumentList();
argList.AddParam("discount", "", discountPercentage.ToString());
((XmlDataSource) sender).TransformArgumentList = argList;
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Handling XmlDataSource Events</title>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:GridView ID="bookView" Runat="server" DataSourceID="bookSource" AutoGenerateColumns="False">
<Columns>
<asp:BoundField HeaderText="ISBN" DataField="ISBN" SortExpression="ISBN"></asp:BoundField>
<asp:BoundField HeaderText="Title" DataField="Title" SortExpression="Title"></asp:BoundField>
<asp:BoundField HeaderText="Price" DataField="Price" SortExpression="Price"></asp:BoundField>
<asp:BoundField HeaderText="Discount" DataField="Discount" SortExpression="Discount"></asp:BoundField>
</Columns>
</asp:GridView>
<asp:XmlDataSource ID="bookSource" Runat="server" DataFile="~/Data.xml"
XPath="Data/genre[@name ='Fiction']/book" TransformFile="~/Data_with_parameter.xsl"
OnTransforming="bookSource_Transforming">
</asp:XmlDataSource>
</div>
</form>
</body>
</html>
File: ~/Data.xml
<Data>
<genre name="Fiction">
<book ISBN="1" Title="title 1" Price="19.99" Discount="1.999">
<chapter num="1" name="Introduction">
Abstract...
</chapter>
<chapter num="2" name="Body">
Abstract...
</chapter>
<chapter num="3" name="Conclusion">
Abstract...
</chapter>
</book>
</genre>
<genre name="NonFiction">
<book ISBN="2" Title="title 2" Price="27.95" Discount="2.795">
<chapter num="1" name="Introduction">
Abstract...
</chapter>
<chapter num="2" name="Body">
Abstract...
</chapter>
<chapter num="3" name="Conclusion">
Abstract...
</chapter>
</book>
</genre>
</Data>
File: ~/Data_with_parameter.xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:param name="discount"/>
<xsl:template match="Data">
<Data>
<xsl:apply-templates select="genre"/>
</Data>
</xsl:template>
<xsl:template match="genre">
<genre>
<xsl:attribute name="name">
<xsl:value-of select="@name"/>
</xsl:attribute>
<xsl:apply-templates select="book"/>
</genre>
</xsl:template>
<xsl:template match="book">
<book>
<xsl:attribute name="ISBN">
<xsl:value-of select="@ISBN"/>
</xsl:attribute>
<xsl:attribute name="title">
<xsl:value-of select="@Title"/>
</xsl:attribute>
<xsl:attribute name="price">
<xsl:value-of select="@Price"/>
</xsl:attribute>
<xsl:attribute name="discount">
<xsl:value-of select="$discount * @Price"/>
</xsl:attribute>
<xsl:apply-templates select="chapters/chapter" />
</book>
</xsl:template>
<xsl:template match="chapter">
<chapter>
<xsl:attribute name="num">
<xsl:value-of select="@num"/>
</xsl:attribute>
<xsl:attribute name="name">
<xsl:value-of select="@name"/>
</xsl:attribute>
<xsl:apply-templates/>
</chapter>
</xsl:template>
</xsl:stylesheet>
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