[Umbraco] umbraco中如何分页

分页功能应该说是web开发中最基本的功能了，常规的做法是通过查询sql语句进行分页数据显示。但在umbraco中却不是这样子的。而且通过xpath中的postion来定位。如下代码

<?xml version=”1.0″ encoding=”UTF-8″?>
<!DOCTYPE xsl:Stylesheet [ &lt;!ENTITY nbsp “ ”> ]>
<xsl:stylesheet version=”1.0″
xmlns:xsl=”http://www.w3.org/1999/XSL/Transform”
xmlns:msxml=”urn:schemas-microsoft-com:xslt”
xmlns:umbraco.library=”urn:umbraco.library”
exclude-result-prefixes=”msxml umbraco.library”>
     <xsl:output method=”xml” omit-xml-declaration=”yes”/>
   <xsl:param name=”currentPage”/>

   <xsl:template match=”/”>
   <xsl:variable name=”recordsPerPage” select=”10″/>
   <xsl:variable name=”pageNumber” >
<xsl:choose>
<!– first page –>
<xsl:when test=”umbraco.library:RequestQueryString(’page’) &lt;= 0 or string(umbraco.library:RequestQueryString(’page’)) = ” or string(umbraco.library:RequestQueryString(’page’)) = ‘NaN’”>0</xsl:when>
<!– what was passed in –>
<xsl:otherwise>
<xsl:value-of select=”umbraco.library:RequestQueryString(’page’)”/></xsl:otherwise>
</xsl:choose>
   </xsl:variable>
   <xsl:variable name=”numberOfRecords” select=”count($currentPage/node)”/>
   <!– The fun starts here –>
<ul>
<xsl:for-each select=”$currentPage/node [string(data [@alias=’umbracoNaviHide’]) != ‘1′]”>
<xsl:if test=”position() &gt; $recordsPerPage * number($pageNumber) and position() &lt;= number($recordsPerPage * number($pageNumber) + $recordsPerPage )">
<li><a href=”{umbraco.library:NiceUrl(@id)}”> <xsl:value-of select=”@nodeName”/> </a> </li>
</xsl:if>
</xsl:for-each>
</ul>
   <xsl:if test=”$pageNumber &gt; 0″>
<a href=”?page{$pageNumber -1}”>previous </a> </xsl:if>
   <xsl:if test=”(($pageNumber +1 ) * $recordsPerPage) &lt; ($numberOfRecords)”> <a href=”?page={$pageNumber +1}”>next</a> </xsl:if>
</xsl:template>
   </xsl:stylesheet>

简单说明

count($currentPage/node)就是计算根节点下以node开头的childNode的个数

position()指的是当前节点的位置，即从1开始的数值