如何从嵌套循环内访问外循环中的元素? [英] How do I access elements from the outer loop from within nested loops?

问题描述

我嵌套了 xsl:for 循环:

I have nested xsl:for loops:

<xsl:for-each select="/Root/A">
    <xsl:for-each select="/Root/B">
        <!-- Code -->
    </xsl:for>
</xsl:for>

从内循环中，如何从外循环中的当前节点访问属性?

我一直发现自己在写这样的代码:

I keep finding myself writing code like this:

<xsl:for-each select="/Root/A">
    <xsl:variable name="someattribute" select="@SomeAttribute"/>
    <xsl:for-each select="/Root/B">
        <!-- Now can use $someattribute to access data from 'A' -->
    </xsl:for>
</xsl:for>

这不能很好地扩展，因为有时我需要访问多条信息并最终为每条信息创建一个变量.有没有更简单的方法?

This doesn't scale very well, as sometimes I need to access several pieces of information and end up creating one variable for each piece. Is there an easier way?

推荐答案

您可以将整个/Root/A 结构存储在一个变量中，并引用该变量，而不是为您需要的每个属性和子元素创建一个新变量访问.

You can store the entire /Root/A structure in a variable, and make reference to that variable rather than creating a new variable for every attribute and subelement you need to access.

<xsl:for-each select="/Root/A/">
    <xsl:variable name="ROOT_A" select="."/>
    <xsl:for-each select="/Root/B/">
         <!-- Variable is accessed like this: $ROOT_A/@someAttribute
              Just like a normal XML node -->
    </xsl:for-each>
</xsl:for-each>

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