XsltArgumentList.AddExtensionObject(String, Object) Method
Definition
Important
Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.
Adds a new object to the XsltArgumentList and associates it with the namespace URI.
public:
void AddExtensionObject(System::String ^ namespaceUri, System::Object ^ extension);public void AddExtensionObject (string namespaceUri, object extension);member this.AddExtensionObject : string * obj -> unitPublic Sub AddExtensionObject (namespaceUri As String, extension As Object)Parameters
- namespaceUri
- String
The namespace URI to associate with the object. To use the default namespace, specify an empty string.
- extension
- Object
The object to add to the list.
Exceptions
The namespaceUri is either null or http://www.w3.org/1999/XSL/Transform
The namespaceUri already has an extension object associated with it.
The caller does not have sufficient permissions to call this method.
Examples
In the following example, the style sheet uses an XSLT extension object to convert the book price.
using System;
using System.IO;
using System.Xml;
using System.Xml.XPath;
using System.Xml.Xsl;
public class Sample {
public static void Main() {
// Create the XslCompiledTransform and load the stylesheet.
XslCompiledTransform xslt = new XslCompiledTransform();
xslt.Load("prices.xsl");
// Create an XsltArgumentList.
XsltArgumentList xslArg = new XsltArgumentList();
// Add an object to calculate the new book price.
BookPrice obj = new BookPrice();
xslArg.AddExtensionObject("urn:price-conv", obj);
using (XmlWriter w = XmlWriter.Create("output.xml"))
{
// Transform the file.
xslt.Transform("books.xml", xslArg, w);
}
}
// Convert the book price to a new price using the conversion factor.
public class BookPrice{
private decimal newprice = 0;
public decimal NewPriceFunc(decimal price, decimal conv){
decimal tmp = price*conv;
newprice = decimal.Round(tmp, 2);
return newprice;
}
}
}
Imports System.IO
Imports System.Xml
Imports System.Xml.XPath
Imports System.Xml.Xsl
Public Class Sample
Public Shared Sub Main()
' Create the XslCompiledTransform and load the stylesheet.
Dim xslt As New XslCompiledTransform()
xslt.Load("prices.xsl")
' Create an XsltArgumentList.
Dim xslArg As New XsltArgumentList()
' Add an object to calculate the new book price.
Dim obj As New BookPrice()
xslArg.AddExtensionObject("urn:price-conv", obj)
Using w As XmlWriter = XmlWriter.Create("output.xml")
' Transform the file.
xslt.Transform("books.xml", xslArg, w)
End Using
End Sub
' Convert the book price to a new price using the conversion factor.
Public Class BookPrice
Private newprice As Decimal = 0
Public Function NewPriceFunc(ByVal price As Decimal, ByVal conv As Decimal) As Decimal
Dim tmp As Decimal = price * conv
newprice = Decimal.Round(tmp, 2)
Return newprice
End Function 'NewPriceFunc
End Class
End Class
The example uses the following data files as input.
books.xml
<bookstore>
<book genre="autobiography" publicationdate="1981" ISBN="1-861003-11-0">
<title>The Autobiography of Benjamin Franklin</title>
<author>
<first-name>Benjamin</first-name>
<last-name>Franklin</last-name>
</author>
<price>8.99</price>
</book>
<book genre="novel" publicationdate="1967" ISBN="0-201-63361-2">
<title>The Confidence Man</title>
<author>
<first-name>Herman</first-name>
<last-name>Melville</last-name>
</author>
<price>11.99</price>
</book>
<book genre="philosophy" publicationdate="1991" ISBN="1-861001-57-6">
<title>The Gorgias</title>
<author>
<name>Plato</name>
</author>
<price>9.99</price>
</book>
</bookstore>
prices.xsl
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:myObj="urn:price-conv">
<!--Price conversion factor-->
<xsl:param name="conv" select="1.15"/>
<xsl:template match="bookstore">
<bookstore>
<xsl:for-each select="book">
<book>
<xsl:copy-of select="node()"/>
<new-price>
<xsl:value-of select="myObj:NewPriceFunc(./price, $conv)"/>
</new-price>
</book>
</xsl:for-each>
</bookstore>
</xsl:template>
</xsl:stylesheet>
Remarks
The params keyword, which allows an unspecified number of parameters to be passed, is currently not supported. XSLT style sheets that utilize methods defined with the params keyword does not work correctly. For more information, see params.
Applies to
See also
.NET