Add <?xml version="1.0" ?> to the top of a xml file after xsl transform

c#, excel, xml, xslt

Solution

You can do this

<xsl:output method="xml" indent="yes" omit-xml-declaration="no" />

or something similar to this using `XmlWriterSettings`

Edit: Added more code. Previous was missing some parts

        XmlWriterSettings writerSettings = null;
        XsltArgumentList transformationArguments = null;
        XslCompiledTransform transformer = null;
        MemoryStream memoryStream = null;
        XPathDocument xPathDocument = null;
        StringBuilder sb = null;
        XmlWriter writer = null;
        XmlDocument resultXml = null;
        try
        {
            writerSettings = new XmlWriterSettings();
            writerSettings.OmitXmlDeclaration = false; // This does it
            writerSettings.Indent = true;

            transformationArguments = new XsltArgumentList();
            transformer = new XslCompiledTransform();
            memoryStream = new MemoryStream(System.Text.Encoding.Default.GetBytes(xml.OuterXml));
            xPathDocument = new XPathDocument(new StreamReader(memoryStream));
            sb = new StringBuilder();
            // give the settings to the writer here
            writer = XmlWriter.Create(sb, writerSettings);
            // this is not mandatory, obviously, just passing parameters to my xslt file
            foreach (KeyValuePair<string, object> parameter in parameters)
            {
                transformationArguments.AddParam(parameter.Key, string.Empty, parameter.Value);
            }

            using (Stream strm = Assembly.GetExecutingAssembly().GetManifestResourceStream("Lib.XSLTFile1.xslt"))
            using (XmlReader reader = XmlReader.Create(strm))
            {
                transformer.Load(reader);
                transformer.Transform(xPathDocument, transformationArguments, writer);
            }
            resultXml = new XmlDocument();
            resultXml.LoadXml(sb.ToString());
            // for testing only
            File.AppendAllText(@"Your path goes here\result.xml", resultXml.OuterXml);
        }
        catch (Exception)
        {
            throw;
        }

This is how I do it, but this code is specifically written to create an instance of a `XmlDocument`. I'm sure you can adapt to your needs.

Problem

Original source