How to apply an XSL Transformation from an XML document to an XML document by using Visual Basic .NET (300929)

SUMMARY

This article illustrates how to apply an Extensible Stylesheet Language (XSL) Transformation (XSLT) to an Extensible Markup Language (XML) document using the XslTransform class to create a new XML document. XSL is an XML-based language that is designed to transform one XML document into another XML document or an XML document into any other structured document.

Requirements

The following list outlines the recommended hardware, software, network infrastructure, and service packs that you need:

Microsoft Visual Studio .NET
Microsoft .NET Software Development Kit (SDK) Quickstarts

This article assumes that you are familiar with the following topics:

XML terminology
Creating and reading an XML file
XML Path Language (XPath) syntax
XSL

Steps to build the sample

This example uses two files named Books.xml and Books.xsl. You can create your own Books.xml and Books.xsl files or use the sample files that are included with the .NET Software Development Kit (SDK) QuickStarts. You must copy the Books.xml and Books.xsl files to the \Bin folder that is located underneath the folder in which you create this project. In Visual Studio .NET 2003, these files can be found in the following folder:

..\Program Files\Microsoft Visual Studio .NET 2003\SDK\v1.1\QuickStart\Howto\Samples\Xml\Transformxml\Vb

In Visual Studio .NET 2002, these files can be found in the following folder:

..\Program Files\Microsoft Visual Studio .NET\FrameworkSDK\Samples\QuickStart\Howto\Samples\Xml\Transformxml\Vb

Create a new Console Application in Visual Basic .NET.
Make sure that the project contains a reference to the System.Xml namespace, and add a reference if it does not.
Use the Imports statement on the Xml and Xsl namespaces so that you are not required to qualify declarations in those namespaces later in your code. You must use the Imports statement prior to any other declarations:
```
Imports System.Xml
Imports System.Xml.Xsl
					
```
Declare the appropriate variables. Declare an XslTransform object to transform XML documents:
```
Dim myXslTransform As XslTransform
					
```
Construct a new XslTransform object. The XslTransform class is an XSLT Processor that implements the XSLT version 1.0 recommendation:
```
myXslTransform = New XslTransform()
```
Use the Load method to load the XslTransform object with the style sheet. This style sheet transforms the details of the Books.xsl file into a simple International Standard Book Number (ISBN) list of books.
```
myXslTransform.Load("books.xsl")
					
```
Call the Transform method to initiate the transformation, passing in the source XML document and the transformed XML document name:
```
myXslTransform.Transform("books.xml", "ISBNBookList.xml")
					
```
Build and run your project. You can find the resultant ISBNBookList.xml file in the \Bin folder under your project file's folder.

Complete code sample

Imports System.Xml
Imports System.Xml.Xsl
Module Module1

    Sub Main()
        Dim myXslTransform As XslTransform
        myXslTransform = New XslTransform()
        myXslTransform.Load("books.xsl")
        myXslTransform.Transform("books.xml", "ISBNBookList.xml")
    End Sub

End Module

REFERENCES

For more information about the XslTransform class, see the following Microsoft .NET Framework Class Library documentation:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemxmlxslxsltransformclasstopic.asp

For more information about the XslTransform class with the XslTransform object, see the following Microsoft .NET Framework Developer's Guide documentation:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpguide/html/cpconxsltransformclassimplementsxsltprocessor.asp

For a practical comparison of XSLT and ASP.NET, see the following MSDN Online Voices Extreme XML column:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnexxml/html/xml02192001.asp

For more information about XML in .NET, see the "XML in .NET: .NET Framework XML Classes and C# Offer Simple, Scalable Data Manipulation" article from MSDN Magazine at the following Microsoft Web site:

http://msdn.microsoft.com/msdnmag/issues/01/01/xml/default.aspx

For more information, refer to the following book:

R. Allen Wyke, Sultan Rehman, Brad Leupen. XML Programming (Core Reference). Microsoft Press, 2001

For more information, refer to the following Microsoft Training & Certification course:

Microsoft Corporation 2500 Introduction to XML and the Microsoft .NET Platform