将测试插入xslt文件以确保没有值为空
我有以下XSLT文件将测试插入xslt文件以确保没有值为空,xslt,umbraco,Xslt,Umbraco,我有以下XSLT文件 <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp " "> ]> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxml="urn:schemas-microsoft
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp " "> ]>
<xsl:stylesheet
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:msxml="urn:schemas-microsoft-com:xslt"
xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:tagsLib="urn:tagsLib" xmlns:BlogLibrary="urn:BlogLibrary" xmlns:UCommentLibrary="urn:UCommentLibrary" xmlns:uForum="urn:uForum" xmlns:uForum.raw="urn:uForum.raw"
exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets tagsLib BlogLibrary UCommentLibrary uForum uForum.raw ">
<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:param name="currentPage"/>
<xsl:variable name="blognode" select="umbraco.library:GetXmlNodeById(1187)" />
<xsl:variable name="today" select="umbraco.library:CurrentDate()" />
<xsl:variable name="later" select="umbraco.library:DateAdd($today, 'd', -3)" />
<xsl:variable name="count" select="4" />
<xsl:template match="/">
<div id="slider" class="news_banner" >
<xsl:for-each select="$blognode/ancestor-or-self::*//BlogPost [@isDoc and umbraco.library:DateGreaterThanOrEqual(PostDate, $later) ]">
<xsl:sort select="pageViewCount" data-type="number" order="descending" />
<xsl:if test="blogImage != ''">
<xsl:variable name="crop" select="umbraco.library:GetMedia(blogImage, 0)/crops/crops/crop [@name='NewsBanner']" />
<xsl:if test="$crop/@url != '' and position() <= $count" >
<a href="{umbraco.library:NiceUrl(@id)}"><img src="{$crop/@url}" alt="{@nodeName}" title="#htmlcaption{@id}" /></a>
</xsl:if>
</xsl:if>
</xsl:for-each>
</div>
<xsl:for-each select="$blognode/ancestor-or-self::*//BlogPost [@isDoc and umbraco.library:DateGreaterThanOrEqual(PostDate, $later) ]">
<xsl:sort select="pageViewCount" data-type="number" order="descending" />
<xsl:if test="blogImage != ''" >
<xsl:variable name="crop" select="umbraco.library:GetMedia(blogImage, 0)/crops/crops/crop [@name='NewsBanner']" />
<xsl:if test="$crop/@url != '' and position() <= $count">
<div id="htmlcaption{@id}" class="nivo-html-caption"><xsl:value-of select="@nodeName" /> - <a href="{umbraco.library:NiceUrl(@id)}">Full Story...</a></div>
</xsl:if>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
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如何在此处插入测试以确保条目不是空的
如何在此处插入测试以
确保条目不为空
取决于“空白”的含义
以下是确定特定表达式的值(为方便起见,此处表示为$var
)是否仅包含空格的一般方法:
string-length(normalize-space($var)) > 0
如果将其作为等效项编写,则可以使其更为通用和灵活:
string-length(translate($var, ' 
	')) > 0
如果我们对“blank”的含义有不同的理解,上述内容可用于检查$var
是否为空。例如:
string-length(translate($var, ' 
	 ')) > 0
测试
$var
是否包含除空格字符(空格、新行回车和制表符)和“不可中断空格字符”(
O;
)之外的任何其他字符。您在谈论哪些条目?