Applied XML Programming for Microsoft .NET.pdf - Csbdu.in

Console.WriteLine("Exception: {0}",e.GetType().ToString());}}}return;The heart of the application is found in the following three lines of rather selfexplanatorycode:XslTransform xslt = new XslTransform();xslt.Load(stylesheet);xslt.Transform(source, output);The style sheet can be loaded from a variety of sources, including XPath documents,XML readers, local disk files, and URLs. The Load method compiles the style sheet anduses the stored information to initialize the XSLT processor. When Load returns, theprocessor is ready to perform any requested transformation.The Transform method loads an XML document, runs the XSLT script, and writes theresults to the specified stream. Transform is particularly handy, because it saves youfrom explicitly loading the source document and creating the output file. As we'll seemore in detail in the section "Performing Transformations," on page 314, Transformuses an intermediate XPath document to transform the XML.NoteSeveral other programming environments allow you to exercise totalcontrol over the XSLT process. In particular, in Microsoft Win32, thecombined use of two distinct instances of the Microsoft.XMLDOMCOM object lets you programmatically perform an XSLTtransformation. The following JScript code illustrates how toproceed:// Collects arguments from the WSH command linesource = WScript.Arguments(0);stylesheet = WScript.Arguments(1);output = WScript.Arguments(2);// Instantiates the XMLDOM for the sourcexml = new ActiveXObject("Microsoft.XMLDOM");xml.load(source);// Instantiates the XMLDOM for the style sheetxsl = new ActiveXObject("Microsoft.XMLDOM");xsl.load(stylesheet);// Creates the outputfso = newActiveXObject("Scripting.FileSystemObject");f = fso.CreateTextFile(output);f.Write(xml.transformNode(xsl.documentElement));f.Close();251