我想在不同级别执行两个元素的乘积之和 [英] I want perform sum of product of two elements at differnt levels
问题描述
我尝试了以下代码,但它不起作用.我取了一个字符串并在其中写入 XSLT 并加载它 XslCompiledTransform 对象.
I tried for following code but its not working. I have taken one string and write XSLT in it and load it XslCompiledTransform object.
<xsl:sequence select=
"sum(//Item/(cost * related_id/Item/quantity))"/>
源 XML:
<AML>
<Item>
<cost>
40
</cost>
<related_id>
<Item>
<quantity>2</quantity>
</Item>
</related_id>
</Item>
<Item>
<cost>
50
</cost>
<related_id>
<Item>
<quantity>10</quantity>
</Item>
</related_id>
</Item>
</AML>
推荐答案
正如我在评论中所说,xsl:sequence
和您尝试使用的 XPath 语法在 XSLT 中不可用1.0(XslCompiledTransform 使用的),但是您可以通过使用递归模板来实现公式的总和:
As I said in the comments, xsl:sequence
and that XPath syntax you're trying to use aren't available in XSLT 1.0 (which XslCompiledTransform uses), but you can achieve a sum of formulas by using a recursive template:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text" indent="yes"/>
<xsl:template match="/">
<xsl:call-template name="SumSet">
<xsl:with-param name="items" select="/*/Item" />
</xsl:call-template>
</xsl:template>
<xsl:template name="SumSet">
<xsl:param name="items" />
<xsl:if test="$items">
<xsl:variable name="currentValue">
<xsl:apply-templates select="$items[1]" />
</xsl:variable>
<xsl:variable name="remainderSum">
<xsl:call-template name="SumSet">
<xsl:with-param name="items" select="$items[position() > 1]" />
</xsl:call-template>
</xsl:variable>
<xsl:value-of select="$currentValue + $remainderSum"/>
</xsl:if>
<xsl:if test="not($items)">0</xsl:if>
</xsl:template>
<xsl:template match="Item">
<xsl:value-of select="cost * related_id/Item/quantity"/>
</xsl:template>
</xsl:stylesheet>
当在您的输入 XML 上运行时,结果是:
When this is run on your input XML, the result is:
580
这将是通用方法,但既然您已经提到您正在使用 XslCompiledTransform,您可以使用 msxsl:node-set()
来稍微简化此任务:
That would be the generic approach, but since you've mentioned that you're using XslCompiledTransform, you can use msxsl:node-set()
to simplify this task a bit:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxsl="urn:schemas-microsoft-com:xslt">
<xsl:output method="text" indent="yes"/>
<xsl:template match="/">
<xsl:variable name="values">
<xsl:apply-templates select="/*/Item" />
</xsl:variable>
<xsl:value-of select="sum(msxsl:node-set($values)/*)"/>
</xsl:template>
<xsl:template match="Item">
<itemValue>
<xsl:value-of select="cost * related_id/Item/quantity"/>
</itemValue>
</xsl:template>
</xsl:stylesheet>
在输入 XML 上运行时,这也会产生值 580
.
This also produces the value 580
when run on your input XML.
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