Html 在 foreach 循环中构建 XSLT 字符串（变量）
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building an XSLT string (variable) in a foreach loop
提问by electroglow
The problem I'm facing seems simple, but being a novice in everything XSL- I'm yet to find a proper solution. What I want to do is build a string by concatenating the results of a foreachelement loop, that I can later on use as a value for an attribute of a HTML element.
我面临的问题似乎很简单，但作为XSL的新手，我还没有找到合适的解决方案。我想要做的是通过连接foreach元素循环的结果来构建一个字符串，稍后我可以将其用作 HTML 元素属性的值。
Given:
鉴于：
<?xml version="1.0" encoding="ISO-8859-1"?>
<catalog>
<cd>
<country>UK</country>
<company>CBS Records</company>
</cd>
<cd>
<country>USA</country>
<company>RCA</company>
</cd>
<cd>
<country>UK</country>
<company>Virgin records</company>
</cd>
</catalog>
Desired output: CBS;RCA;Virgin records
期望的输出： CBS;RCA;Virgin records
I need a valid portion of XSLTcode that would perform this transformation in a way described above. I believe I need an xsl-variablethat would hold the result of concatenating <company>and a separator character ;. How can this be done? Thank you.
我需要一个有效的XSLT代码部分，以上述方式执行此转换。我相信我需要一个xsl 变量来保存连接<company>和分隔符的结果;。如何才能做到这一点？谢谢你。
回答by Erika E
I don't believe you can use XSL variables to concatenate, because once a variable value is set, it can't be changed. Instead, I think you want something like:
我不相信您可以使用 XSL 变量来连接，因为一旦设置了变量值，就无法更改。相反，我认为你想要的是：
<xsl:for-each select="catalog/cd">
<xsl:choose>
<xsl:when test="position() = 1">
<xsl:value-of select="country"/>
</xsl:when>
<xsl:otherwise>
;<xsl:value-of select="country"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
Does that make sense to you?
这对你有意义吗？
Edit: Just realized I may have misread how you were intending to use the variable. The snippet I posted above can be wrapped in a variable element for later use, if that's what you meant:
编辑：刚刚意识到我可能误读了您打算如何使用该变量。我上面发布的代码段可以包装在一个变量元素中供以后使用，如果这就是你的意思：
<xsl:variable name="VariableName">
<xsl:for-each select="catalog/cd">
<xsl:choose>
<xsl:when test="position() = 1">
<xsl:value-of select="country"/>
</xsl:when>
<xsl:otherwise>
;<xsl:value-of select="country"/>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</xsl:variable>
回答by Dimitre Novatchev
Here is one simple, true XSLT solution:
这是一个简单的、真正的 XSLT 解决方案：
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:strip-space elements="*"/>
<xsl:template match="company">
<xsl:value-of select="."/>
<xsl:if test="following::company">;</xsl:if>
</xsl:template>
<xsl:template match="text()"/>
</xsl:stylesheet>
When this transformation is applied on the provided XML document:
当此转换应用于提供的 XML 文档时：
<catalog>
<cd>
<country>UK</country>
<company>CBS Records</company>
</cd>
<cd>
<country>USA</country>
<company>RCA</company>
</cd>
<cd>
<country>UK</country>
<company>Virgin records</company>
</cd>
</catalog>
the wanted, correct result (all companies concatenated together and delimited by a ;) is produced:
产生了想要的、正确的结果（所有公司连接在一起并由 a 分隔;）：
CBS Records;RCA;Virgin records
回答by Mads Hansen
If you can use XSLT 2.0 then either of the following would work:
如果您可以使用 XSLT 2.0，那么以下任一方法都可以使用：
Use the string-join()function:
使用string-join()函数：
<xsl:variable name="companies" select="string-join(catalog/cd/company, ';')" />
Use @separatorwith xsl:value-of:
使用@separator有xsl:value-of：
<xsl:variable name="companies" >
<xsl:value-of select="catalog/cd/company" separator=";" />
</xsl:variable>
