Nested for-each loops in XSLT not working

问题

I cant seem to get this nested for loop to work correctly, I want to print all of the tracks on the EP in the row with the EP name and other details. Everything from the first for-each loop displays correctly but nothing is pulled through for the for-each loop to get the tracks.

Here is my XML

<dalehoward>

<ep>
    <name>Letters EP</name>
    <year>2012</year>
    <label>Static Audio</label>
    <image>letters.jpg</image>

        <tracks>
        <track number="1">
            <tname>Letters</tname>
            <length>6.35</length>
        </track>
        <track number="2">
            <tname>Later</tname>
            <length>7.56</length>
        </track>
            <track number="3">
            <tname>'89 Flava</tname>
            <length>7:38</length>
        </track>
        <track number="4">
            <tname>Safe Presentation</tname>
            <length>7.55</length>
        </track>
        </tracks>
</ep>



<ep>
    <name>Inner City EP</name>
    <year>2012</year>
    <label>Lost My Dog</label>
    <image>innercity.jpg</image>

    <tracks>
    <track number="1">
            <tname>C'Mon</tname>
            <length>7.15</length>
        </track>
        <track number="2">
            <tname>Koppabird</tname>
            <length>6.27</length>
        </track>
        <track number="3">
            <tname>Inner City</tname>
            <length>8:50</length>
        </track>
        <track number="4">
            <tname>You Can</tname>
            <length>8:16</length>
        </track>
        <tracks>
</ep>
<dalehoward>

and here is the XSLT

<xsl:variable name="imagefolder" select="'xml/images/'" />
<xsl:template match="/">


<html>
<body>
<h2>My CD Collection</h2>
<table border="1" width="100%">
  <tr bgcolor="#9acd32">
    <th style="text-align:left">Title</th>
    <th style="text-align:left">Year</th>
    <th style="text-align:left">Label</th>
    <th style="text-align:left">Tracks</th>
    <th style="text-align:left">Artwork</th>
  </tr>
  <xsl:for-each select="dalehoward/ep">
  <tr>
    <td><xsl:value-of select="name"/></td>
    <td><xsl:value-of select="year"/></td>
    <td><xsl:value-of select="label"/></td>
    <td>testtext<xsl:for-each select="dalehoward/ep/tracks">
        <xsl:value-of select="tname"/><br />
        <xsl:value-of select="length"/> <br /><br />
        </xsl:for-each></td>
    <td><img width="150px" height="150px"><xsl:attribute name="src">
             <xsl:copy-of select="$imagefolder"/>
             <xsl:value-of select="image"/>
             </xsl:attribute></img></td>
  </tr>
  </xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>

Thanks a lot in advance for any help

回答1:

The outer loop puts you in the context of ep. The context of the inner loop needs to be established from there (or as an absolute path, starting from the root) - so change:

<xsl:for-each select="dalehoward/ep/tracks">

to:

<xsl:for-each select="tracks/track">

来源：https://stackoverflow.com/questions/23530495/nested-for-each-loops-in-xslt-not-working

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