=t18> XPath(XML Path language)是
种处理XML文档段
语言
XSLT(Extensible Stylesheet Language Transformations,可扩展样式表语言转换)使用XPath描述表达式和地址路径控制节点选取XSLT可以将XML转换为各种格式
如HTML或其他格式 下面用
个邮件合并
来简要介绍说明XPath串
下面XML文件中包含数据XSLT文件中包含对邮件格式定义MSXML4.0对XML文档应用样式表产生个合并邮件文本文档XML文件 Letter.xml
<?xml version=\"1.0\" encoding=\"UTF-8\"?>
<Letter>
<Date>July 17, 2002</Date>
<To>
<FirstName>Vicky</FirstName>
<LastName>P</LastName>
<Sex>Male</Sex>
</To>
<Address>
<Line1>900 National Pkwy</Line1>
<Line2>Suite 105</Line2>
<City>Bellevue</City>
<State>WA</State>
<Zip>98007</Zip>
<Country>USA</Country>
</Address>
<Subject>ESTATE OF JOHN DOE / FILE NO. 12345.6789</Subject>
<Text>
Please pay the property taxes as soon as possible.
</Text>
<Sender>
<FirstName>John</FirstName>
<LastName>M</LastName>
<Title>Sr. Tax Consultant</Title>
</Sender>
</Letter>
XSLT样式表文档 Letter.xsl
<?xml version=\'1.0\' encoding=\"utf-8\"?>
<xsl:stylesheet version=\"1.0\"
xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\">
<xsl:output method=\"text\" indent=\"yes\"/>
<xsl:variable name=\"NL\" select=\"\'
\'\" />
<xsl:variable name=\"Para\" select=\"concat($NL, $NL)\" />
<xsl:template match=\"/\">
<xsl:value-of select=\"//Date\" />
<xsl:value-of select=\"$Para\" />
To,
<xsl:value-of select=\"concat(//To/FirstName, \' \', //To/LastName)\" />
<xsl:value-of select=\"$NL\" />
<xsl:value-of select=\"//Address/Line1\" />
<xsl:value-of select=\"$NL\" />
<xsl:value-of select=\"//Address/Line2\" />
<xsl:value-of select=\"$NL\" />
<xsl:value-of select=\"concat(//Address/City, \' \', //Address/State, \' \', //Address/Zip)\" />
<xsl:value-of select=\"$NL\" />
<xsl:value-of select=\"//Address/Country\" />
<xsl:value-of select=\"$Para\" />
Regarding: <xsl:value-of select=\"//Subject\" />
<xsl:value-of select=\"$NL\" />
Dear <xsl:
test=\"starts-with(//Sex, \'M\')\">Mr. </xsl:><xsl: test=\"starts-with(//Sex, \'F\')\">Miss </xsl:><xsl:value-of select=\"concat(//To/FirstName, \' \', //To/LastName)\" />,
<xsl:value-of select=\"$Para\" />
<xsl:value-of select=\"//Text\" />
<xsl:value-of select=\"$Para\" />
Sincerely,
<xsl:value-of select=\"$Para\" />
<xsl:value-of select=\"concat(//Sender/FirstName, \' \', //Sender/LastName)\" />
<xsl:value-of select=\"$NL\" />
<xsl:value-of select=\"//Sender/Title\" />
</xsl:template>
</xsl:stylesheet>
上面
样式表举例介绍说明了concat和starts-with XPath串和怎样在输出文本中增加新行还有定义和使用变量下面是
执行结果1.VC6建立Win32控制台应用
2.在stdafx.h中添加下面
代码:#
<TCHAR.H>#
<stdio.h>#
<time.h>#import \"msxml4.dll\"
// If this import statement fails, you need to
MSXML 4.0 SP1 from://http://msdn.microsoft.com/downloads/sample.asp?url=/MSDN-FILES/027/001/766/msdncompositedoc.xml
#
<msxml2.h>// If this
statement fails, you need to MSXML 4.0 SP1 SDK from://http://msdn.microsoft.com/downloads/sample.asp?url=/MSDN-FILES/027/001/766/msdncompositedoc.xml
// You also need to add the
file and library search path// to Visual C
\'s list of directories (Tools > Options... > Directories).using
MSXML2;inline void EVAL_HR( HRESULT _hr )
{
FAILED(_hr) throw(_hr); }#
TEMP_SIZE _MAX_PATH // size of 
buffer
_TCHAR szTemp[TEMP_SIZE]; // multipurpose buffer _disibledevent=>
4.
:
( argc, char* argv
){
try
{
EVAL_HR(CoInitialize(NULL));
// Make sure that MSXML 4.0 is
ed (!isMSXMLInstalled
)
-1;// Make sure that XML and XSL file names are passed
// as command line parameters
(argc < 3)// Show proper message here
-1;IXMLDOMDocument2Ptr pXMLDoc = NULL;
IXMLDOMDocument2Ptr pXSLDoc = NULL;
// Load the XML document
(loadDocument(pXMLDoc, argv[1], true)){
// Load the stylesheet
(loadDocument(pXSLDoc, argv[2], false)){
_ftpr
f(stdout, pXMLDoc->transformNode(pXSLDoc));}
{
pr
MSXMLError(pXSLDoc);}
}
{
pr
MSXMLError(pXMLDoc);}
}
catch(...)
{//exception handling
}
_ftpr
f(stdout, \"\\n\\nPress Enter to continue...\");getchar
;CoUninitialize
; 0;}
5.XML文件和XSLT样式表文件名作为命令行参数传递给应用
主通过
isMSXMLInstalled验证 MSXML4.0是否安装接下来两次loadDocument;先是加载XML文档,然后是加载XSLT样式表 最后transformNode进行转换6.本例代码下载:http://www.perfectxml.com/CPPMSXML/downloads/20020716MailMerge.zip
译自PerfectXML
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