It is because we can not write the DOCTYPE element in the xslt file, it's not a well-formed xml element. To achieve this goal you must use xsl: output, just as below <? Xml version = "1.0" encoding = "UTF-8"?>
<Xsl: stylesheetversion = "1.0"
Xmlns: xsl = "http://www.w3.org/1999/XSL/Transform">
<Xsl: output
Method = "html"
Encoding = "UTF-8"
Doctype-public = "-// W3C // dtd xhtml 1.0 Transitional // EN"
Doctype-system = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"/>
<Xsl: template match = "/">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> </title>
</Head>
<Body>
</Body>
</Html>
</Xsl: template>
</Xsl: stylesheet>
The result is something like: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<Html xmlns = "http://www.w3.org/1999/xhtml">
<Head>
<Title> </title>
</Head>
<Body>
</Body>
</Html>
In the xsl: output element:
Method: identifies the method that shocould be used for outputting the result, it can be one of xml, html or text.
Encoding: specifies the preferred character encoding that the XSLT processor shocould use to encode sequences of characters
Sequences of bytes
Doctype-public: specifies the public identifier to be used in the document type declaration. If given this attribute it will generate a DOCTYPE in the output document, such as <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN">
Doctype-system: specifies the system identifier to be used in the document type declaration. If given this attribute it will generate a DOCTYPE in the output
Document, such as <! DOCTYPE html SYSTEM "./dtds/book. dtd">
If both the doctype-public and doctype-system attributes are specified in the xsl: output element, for example, <xsl: output
Method = "html" doctype-public = "-// W3C // dtd xhtml 1.0 Transitional // EN"
Doctype-system = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"
/> Will generate the DOCTYPE like: <! DOCTYPE html PUBLIC "-// W3C // dtd xhtml 1.0 Transitional // EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">. In this situation the doctype-system only identifies the resource (DTD) referenced.
Cdata-section-elements: specifies a list of the names of elements whose text node children shoshould be output using CDATA sections, for example, cdata-section-elements = "script" will result in all the text in the elements <script> </script> are treated just as they are in <! [CDATA []> by the XSLT processor.
The c # code handling the transformation is below: Using System;
Using System. Xml;
Using System. Xml. Xsl;
Using System. Xml. XPath;
Using System. Text;
Using System. IO;
This. Response. ContentType = "text/html ";
// Retrieve the xml document object from the model
XmlDocument doc = BoxImpl. BoxXml (this. _ templateId, this. _ type, this. _ boxId, this. _ op );
// In. NET framework 2.0, it is recommended that use the specified compiledtransform instead of your Transform
Extends compiledtransform transform = new extends compiledtransform ();
Transform. Load (this. Server. MapPath ("cc. xsl "));
MemoryStream stream = new MemoryStream ();
Transform. Transform (doc. CreateNavigator (), null, stream );
// Maybe the Position was moved to the end of the MemoryStream while transforming,
// So it's necessary to set this attribute to 0 before reading the stream
Stream. Position = 0;
// The encoding attribute specified in the xsl: output node is UTF-8,
// So here we read the output stream using the System. Text. Encoding. UTF8 correspondingly
StreamReader reader = new StreamReader (stream, System. Text. Encoding. UTF8 );
This. Response. Write (reader. ReadToEnd ());
Reader. Close ();
Stream. Close ();
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