Change Xml Declaration, or select xml without declaration section

Question

I need to change the xml declaration section of by document, or just select the data minus the declaration. Which is easier?

This is an example of what my xml looks like:

<?xml version="1.0" encoding="utf-16"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master page-height="11in" page-width="8.5in" margin-top="0.50in" margin-left="0.8in" margin-right="0.8in" margin-bottom="0.25in" master-name="PageMaster">
            <fo:region-body border-style="none" border-width="thin" margin-top="0in" margin-left="0in" margin-right="0in" margin-bottom="0.25in"/>
            <fo:region-after border-style="none" border-width="thin" extent="0.25in"/>
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="PageMaster"/>
</fo:root>

I'm trying to change the xml declaration to be:

<?xml version="1.0" encoding="iso-8859-1"?>

Answer 1

Are you trying to change the XML programmatically? If so you can do so by creating new XmlDeclaration and replacing it with the previous one as shown below:

XmlDeclaration xmlDeclaration;
xmlDeclaration = doc.CreateXmlDeclaration("1.0", "iso-8859-1", null);
doc.ReplaceChild(xmlDeclaration, doc.FirstChild);

You just have to make sure that the first child of the document is Xml Declaration.

Answer 2

The wanted "change of XML declaration" can be done very easily (not commenting whether or not this change is the correct solution to your problem) using XSLT:

<xsl:stylesheet version="1.0"
 xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
 <xsl:output indent="yes" encoding="ISO-8859-1"/>

 <xsl:template match="node()|@*">
  <xsl:copy>
   <xsl:apply-templates select="node()|@*"/>
  </xsl:copy>
 </xsl:template>
</xsl:stylesheet>

Just apply this transformation to the provided XML document:

<?xml version="1.0" encoding="utf-16"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master page-height="11in" page-width="8.5in" margin-top="0.50in" margin-left="0.8in" margin-right="0.8in" margin-bottom="0.25in" master-name="PageMaster">
            <fo:region-body border-style="none" border-width="thin" margin-top="0in" margin-left="0in" margin-right="0in" margin-bottom="0.25in"/>
            <fo:region-after border-style="none" border-width="thin" extent="0.25in"/>
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="PageMaster"/>
</fo:root>

and the wanted result is produced:

<?xml version="1.0" encoding="iso-8859-1"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format">
    <fo:layout-master-set>
        <fo:simple-page-master page-height="11in" page-width="8.5in" margin-top="0.50in" margin-left="0.8in" margin-right="0.8in" margin-bottom="0.25in" master-name="PageMaster">
            <fo:region-body border-style="none" border-width="thin" margin-top="0in" margin-left="0in" margin-right="0in" margin-bottom="0.25in" />
            <fo:region-after border-style="none" border-width="thin" extent="0.25in" />
        </fo:simple-page-master>
    </fo:layout-master-set>
    <fo:page-sequence master-reference="PageMaster" />