XML对数据岛数据实现动态排序二法

最新推荐文章于 2005-11-14 20:15:00 发布

原创最新推荐文章于 2005-11-14 20:15:00 发布 · 540 阅读

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#xml #xsl #stylesheet #object #div #transformation

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博客介绍了XML动态排序的两种实现方法。一是为<xsl:param>标签设定参数实现动态排序，推荐使用；二是直接通过DOM实现，但灵活性欠缺。文中给出了具体的代码示例，包括HTML、XML、XSL和脚本代码。

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1、为<xsl:param>标签设定参数实现动态排序（推荐）

<html>
<body>
<table DATASRC="#catalogs" border=1>
<thead>
<tr>
<td onclick="sort('TITLE','descending');">TITLE</td>
<td>ARTIST</td>
<td onclick="sort('COUNTRY','ascending');">COUNTRY</td>
<td>COMPANY</td>
<td>PRICE</td>
<td>YEAR</td>
</tr>
</thead>
<tbody>
<tr>
<td ><div DATAFLD="TITLE"></div></td>
<td ><div DATAFLD="ARTIST"></div></td>
<td ><div DATAFLD="COUNTRY"></div></td>
<td ><div DATAFLD="COMPANY"></div></td>
<td ><div DATAFLD="PRICE"></div></td>
<td ><div DATAFLD="YEAR"></div></td>
</tr>
</tbody>
</table>

<xml id="catalogs">
<CATALOG>
<CD>
<TITLE>Empire Burlesque</TITLE>
Bob Dylan
<COUNTRY>USA</COUNTRY>
<COMPANY>Columbia</COMPANY>
<PRICE>10.90</PRICE>
<YEAR>1985</YEAR>
</CD>
<CD>
<TITLE>Burlesque</TITLE>
Dylan
<COUNTRY>UA</COUNTRY>
<COMPANY>umbia</COMPANY>
<PRICE>1.90</PRICE>
<YEAR>1987</YEAR>
</CD>
<CD>
<TITLE>Empire</TITLE>
Bob
<COUNTRY>US</COUNTRY>
<COMPANY>bia</COMPANY>
<PRICE>12.90</PRICE>
<YEAR>1995</YEAR>
</CD>
</CATALOG>
</xml>

<xml id="xstyle">
<xsl:stylesheet xmlns:xsl=" http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="xml"/>
<xsl:param name="sortorder" select="'descending'"/>
<xsl:param name="sortfield" select="'xxx'"/>
<xsl:template match="/">
<CATALOG>
<xsl:for-each select="CATALOG/CD">
<xsl:sort select="*[name()=$sortfield]" order="{$sortorder}" />
<CD>
<TITLE><xsl:value-of select="TITLE"/></TITLE>
<xsl:value-of select="ARTIST"/>
<COUNTRY><xsl:value-of select="COUNTRY"/></COUNTRY>
<COMPANY><xsl:value-of select="COMPANY"/></COMPANY>
<PRICE><xsl:value-of select="PRICE"/></PRICE>
<YEAR><xsl:value-of select="YEAR"/></YEAR>
</CD>
</xsl:for-each>
</CATALOG>
</xsl:template>
</xsl:stylesheet>
</xml>

<script language="vbscript">
function sort(strSortField, strSortOrder)

dim objXSL, objXML, objTemplate, objProcessor, strHTML, strDrinkType

Set objXML = CreateObject("Msxml2.FreeThreadedDOMDocument")
Set objXSL = CreateObject("Msxml2.FreeThreadedDOMDocument")

'Load the XML document
objXML.async = False
objXML.Loadxml catalogs.xml

'Load the XSL document
objXSL.async = False
objXSL.Loadxml xstyle.xml

'Create an instance of our XSL Template object
Set objTemplate = CreateObject("MSXML2.XSLTemplate")

'Create an instance of our stylesheet object using our recently loaded XSLT document
Set objTemplate.stylesheet = objXSL

'Create an instance of our Processor object
Set objProcessor = objTemplate.createProcessor

'Define the input object for our object equal to our recently loaded XML document
objProcessor.input = objXML

'Now, finally we can add any parameters that we require to our Template processor
objProcessor.AddParameter "sortfield", strSortField
objProcessor.AddParameter "sortorder", strSortOrder

'Last but not least we do our transformation
objProcessor.Transform

'Store the results of the output into a string.
strXML = objProcessor.output

'Load up an XML DOM object from the recent XML output
objXML.loadxml strXML

'Select only the "employees" elements from our document object
objXML.selectNodes("//CATALOG")

'Load our Data Island using our new XML object
catalogs.loadxml objXML.xml
end function
</script>

<script language="javascript">
function sort2(xmlObj, xslObj, sortByColName)
{
var xmlData=eval("document.all."+xmlObj).XMLDocument;
var xslData=eval("document.all."+xslObj).XMLDocument;
var nodes=xslData.documentElement.selectSingleNode("xsl:for-each");
nodes.selectSingleNode("@order-by").value=sortByColName;

xmlData.documentElement.transformNodeToObject(xslData.documentElement,xmlData);
}
</script>

</body>
</html>

2、直接通过DOM实现，灵活性欠缺：

<html>
<body>
<table DATASRC="#catalogs" border=1>
<thead>
<tr>
<td onclick="sort('catalogs','xstyle','TITLE');">TITLE</td>
<td>ARTIST</td>
<td>COUNTRY</td>
<td>COMPANY</td>
<td>PRICE</td>
<td>YEAR</td>
</tr>
</thead>
<tbody>
<tr>
<td ><div DATAFLD="TITLE"></div></td>
<td ><div DATAFLD="ARTIST"></div></td>
<td ><div DATAFLD="COUNTRY"></div></td>
<td ><div DATAFLD="COMPANY"></div></td>
<td ><div DATAFLD="PRICE"></div></td>
<td ><div DATAFLD="YEAR"></div></td>
</tr>
</tbody>
</table>

<xml id='catalogs'>
<CATALOG>
<CD>
<TITLE>Empire Burlesque</TITLE>
Bob Dylan
<COUNTRY>USA</COUNTRY>
<COMPANY>Columbia</COMPANY>
<PRICE>10.90</PRICE>
<YEAR>1985</YEAR>
</CD>
<CD>
<TITLE>Burlesque</TITLE>
Dylan
<COUNTRY>UA</COUNTRY>
<COMPANY>umbia</COMPANY>
<PRICE>1.90</PRICE>
<YEAR>1987</YEAR>
</CD>
<CD>
<TITLE>Empire</TITLE>
Bob
<COUNTRY>US</COUNTRY>
<COMPANY>bia</COMPANY>
<PRICE>12.90</PRICE>
<YEAR>1995</YEAR>
</CD>
</CATALOG>
</xml>

<xml id="xstyle">
<CATALOG>
<xsl:for-each select="CD" order-by="+TITLE" xmlns:xsl=" http://www.w3.org/TR/WD-xsl">
<CD>
<TITLE><xsl:value-of select="TITLE"/></TITLE>
<xsl:value-of select="ARTIST"/>
<COUNTRY><xsl:value-of select="COUNTRY"/></COUNTRY>
<COMPANY><xsl:value-of select="COMPANY"/></COMPANY>
<PRICE><xsl:value-of select="PRICE"/></PRICE>
<YEAR><xsl:value-of select="YEAR"/></YEAR>
</CD>
</xsl:for-each>
</CATALOG>
</xml>

<script language="javascript">
function sort(xmlObj, xslObj, sortByColName)
{
var xmlData=eval("document.all."+xmlObj).XMLDocument;
var xslData=eval("document.all."+xslObj).XMLDocument;
var nodes=xslData.documentElement.selectSingleNode("xsl:for-each");
nodes.selectSingleNode("@order-by").value=sortByColName;

xmlData.documentElement.transformNodeToObject(xslData.documentElement,xmlData);
}
</script>
</body>
</html>