C#.NET 4 - Transforming XML and XSL documents with settings and parameters

This following example takes a path to an XML file, a path to an XSL file and optional parameters to pass to the XSL file. The XSL file will decorate any xsl:param tags with these values.

The example also includes settings objects to show how settings can be applied to the tranformation and the loading of the XML.


Example C# Code

string xsltResult = string.Empty;

try

{

    // XML Settings

    XmlReaderSettings xmlSettings = new XmlReaderSettings();

    xmlSettings.XmlResolver = null;

    xmlSettings.IgnoreComments = true;

    xmlSettings.DtdProcessing = DtdProcessing.Ignore;

    xmlSettings.ValidationType = ValidationType.None;

    // Attaches an action to the valiation event handler. This will write out error messages in the Output pane.

    #if DEBUG

    xmlSettings.ValidationEventHandler += (sender, e) =>

    {

        Debug.WriteLine(string.Format("{0}({1},{2}): {3} - {4}", e.Exception.SourceUri, e.Exception.LineNumber, e.Exception.LinePosition, e.Severity, e.Message));

    };

    #endif

    // XSLT Settings

    XmlReaderSettings xsltSettings = new XmlReaderSettings();

    xsltSettings.XmlResolver = null;

    xsltSettings.DtdProcessing = DtdProcessing.Ignore;

    xsltSettings.ValidationType = ValidationType.None;

    // Attaches an action to the valiation event handler. This will write out error messages in the Output pane.

    #if DEBUG

    xsltSettings.ValidationEventHandler += (sender, e) =>

    {

        Debug.WriteLine(string.Format("{0}({1},{2}): {3} - {4}", e.Exception.SourceUri, e.Exception.LineNumber, e.Exception.LinePosition, e.Severity, e.Message));

    };

    #endif

    // Init params

    XsltArgumentList xslArgs = new XsltArgumentList();

    if (parameters != null)

    {

        foreach (KeyValuePair<string, string> param in parameters)

            xslArgs.AddParam(param.Key, string.Empty, param.Value);

    }

    // Load XML

    using (XmlReader reader = XmlReader.Create(xmlPath, settings))

    {

        // Load XSL

        XsltSettings xslSettings = new XsltSettings(true, true); // Need to enable the document() fucntion

        using(XmlReader xslSource = XmlReader.Create(xslPath, xsltSettings))

        {

            XslCompiledTransform xsltDoc = new XslCompiledTransform();

            xsltDoc.Load(xslSource, xslSettings, new XmlUrlResolver());

            // Transform

            using (var sw = new UTF8StringWriter())

            {

                        XmlWriterSettings settings = new XmlWriterSettings();

                        settings.Encoding = Encoding.UTF8;

                        settings.OmitXmlDeclaration = true;

                using(var xw = XmlWriter.Create(sw,settings))

                {

                    xsltDoc.Transform(reader, xslArgs, sw);

                }

                xsltResult = sw.ToString();

            }

        }

    }

}

catch {} // custom error handling here