如何获得for-each循环中所有项目的总成本？ ?xml version="1.0" encoding="utf-8" ?Characters Character ID="1" Name="Simmo" Inventory MaxSlots="20" Item ID="1" Name="Gold" Cost="1" Count100/Count /Item Item ID="1" Name="hat" Cost
<?xml version="1.0" encoding="utf-8" ?>
<Characters>
<Character ID="1" Name="Simmo">
<Inventory MaxSlots="20">
<Item ID="1" Name="Gold" Cost="1">
<Count>100</Count>
</Item>
<Item ID="1" Name="hat" Cost="10">
<Count>1</Count>
</Item>
<Item ID="2" Name="stick" Cost="15">
<Count>2</Count>
</Item>
</Inventory>
</Character>
</Characters>
例如1 * 100 10 * 1 15 * 2 = 140
我未完成的xsl解决方案：
<?xml version="1.0" encoding="utf-8"?>
<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" indent="yes"/>
<xsl:template match="/">
<html>
<head>
<title>xsl file</title>
</head>
<body>
<ul>
<xsl:for-each select="/Characters/Character">
<li>
Character name: <xsl:value-of select="@Name"/>
<br/>
<xsl:for-each select="Inventory/Item">
<xsl:variable name="cos" select="@Cost"/>
<xsl:variable name="cou" select="Count"/>
<xsl:variable name="kor" select="$cos*$cou"/>
Total cost:<xsl:value-of select="$kor"/>
<br/>
</xsl:for-each>
<br />
</li>
</xsl:for-each>
</ul>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
当前输出：
人物名称：Simmo
总费用：100
总费用：10
总费用：30
但如何获得角色名称：Simmo总费用：140
三种可能性：(1)转到XSLT 2.0并编写
Character name: <xsl:value-of select="@Name"/> <br/> Total cost: <xsl:value-of select=" sum(for $i in Inventory/Item return $i/@Cost * $i/Count) "/>
(2)在XSLT 1.0中,使用已经指向的related question中详细描述的EXSLT节点集扩展(a)创建一组包含@Cost和Count的乘积的节点,以及(b)求和它们.
(3)编写递归命名模板以循环遍历项目集,计算运行总计.这看起来像这样(未经测试)：
<xsl:template match="/">
... some of your code omitted here ...
<xsl:for-each select="/Characters/Character">
<li>
Character name: <xsl:value-of select="@Name"/>
<br/>
<xsl:call-template name="sum-items">
<xsl:with-param name="item"
select="Inventory/Item[1]"/>
<xsl:with-param name="accumulator"
select="0"/>
</xsl:call-template>
<br />
</li>
</xsl:for-each>
...
</xsl:template>
<xsl:template name="sum-items">
<xsl:param name="item"/>
<xsl:param name="accumulator"/>
<xsl:choose>
<xsl:when test="not($item)">
<!--* done, return result *-->
Total cost: <xsl:value-of select="$accumulator"/>
</xsl:when>
<xsl:otherwise>
<xsl:variable name="acc"
select="$accumulator + ($item/@Cost * $item/Count)"/>
<xsl:call-template name="sum-items">
<xsl:with-param name="item"
select="$item/following-sibling::item[1]"/>
<xsl:with-param name="accumulator" select="$acc"/>
</xsl:call-template>
</xsl:otherwise>
</xsl:when>
</xsl:template>