XSLT self-closing tags issue

2019-01-17 10:49发布

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I am using xslt to transform an xml file to html. The .net xslt engine keeps serving me self-closing tags for empty tags.

Example:

<div class="test"></div>

becomes 

<div class="test" />

The former is valid html, while the latter is illegal html and renders badly. My question is : How do I tell the xslt engine (XslCompiledTransform) to not use self-closing tags.

If it's not possible, how can I tell my browser (IE6+ in this case) to interpret self-closing tags correctly.

11条回答
萌系小妹纸
2楼-- · 2019-01-17 11:25

There are a few things you need to be careful:

  1. In your xsl use < xsl:output method='html'>
  2. set OutputSettings in your output XmlWriter
  3. in the Html inside your xsl, don't set attributes in html tag like this < html xmlns="http://www.w3.org/1999/xhtml"> but use < html> instead.

This is a piece of working code:

string xmlStr = "<?xml version='1.0' encoding='UTF-8'?><Data></Data>";
XmlDocument doc = new XmlDocument();
doc.LoadXml(xmlStr);
string xslContents = @"
<xsl:stylesheet version='1.0' xmlns:xsl='http://www.w3.org/1999/XSL/Transform'  
xmlns:msxsl='urn:schemas-microsoft-com:xslt' exclude-result-prefixes='msxsl'>
<xsl:output method='html' version='4.0' omit-xml-declaration='yes' indent='yes'/>
<xsl:template match='Data'>
<html>
<body>
    <div></div>
</body>
</html>
</xsl:template>
</xsl:stylesheet>";
XslCompiledTransform xsl = new XslCompiledTransform();
xsl.Load(XmlReader.Create(new StringReader(xslContents)));
StringWriter result = new StringWriter();
using (XmlWriter writer = XmlWriter.Create(result, xsl.OutputSettings))
{
    xsl.Transform(doc, null, writer);
}
System.Diagnostics.Debug.Write( result.ToString());
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来，给爷笑一个
3楼-- · 2019-01-17 11:28

If you are using XmlWriter as your ouput stream, use HTMLTextWriter instead. XMLWriter will reformat your HTML output back to XML.

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【Aperson】
4楼-- · 2019-01-17 11:29

You can't tell your browser to handle invalid HTML as HTML -- you're lucky it understands malformed HTML at all. :)

Definitely do this in your stylesheet: 

<xsl:output method="html"/>

But, if your source document has namespaces, this won't do the trick. XSLT processors seem to silently change the output method back to XML if namespace nodes are present in the output.

You need to replace all instances of <xsl:copy-of> and <xsl:copy> with creations of elements with just the local name, e.g.

<xsl:template match="*">
   <xsl:element name="{local-name()}">
     <xsl:apply-templates/>
   </xsl:element>
</xsl:template>

See

etc.

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Emotional °昔
5楼-- · 2019-01-17 11:34

Change your xsl:output method to be html (instead of xml).

Or add it if you haven't already got the element

<xsl:output method="html"/>
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Fickle 薄情
6楼-- · 2019-01-17 11:38

The easy way I found was creating a new XmlTextWriter class to override the method WriteEndElement, forcing the non-closing tag and pass on the serialization process as parameter.

public class MyXmlTextWriter : XmlTextWriter
{
    public MyXmlTextWriter(Stream stream) : base(stream, Encoding.UTF8)
    { }
    public MyXmlTextWriter(TextWriter stream) : base(stream)
    { }

    public override void WriteEndElement()
    {
        base.WriteFullEndElement();
    }
}
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