XSLT <xsl:choose> 元素

<xsl:choose> 元素用于结合 <xsl:when> 和 <xsl:otherwise> 来表达多重条件测试。

<xsl:choose> 元素

语法

<xsl:choose>
   <xsl:when test="expression">
         ... some output ...
   </xsl:when>
   <xsl:otherwise>
         ... some output ....
   </xsl:otherwise>
</xsl:choose>

在何处放置选择条件

如需插入针对 XML 文件的多重条件测试，请向 XSL 文件添加 <xsl:choose>、<xsl:when> 以及 <xsl:otherwise> 元素：

实例

<?xml version="1.0" encoding="ISO-8859-1"?>

<catalog>
	<cd>
		<title>Empire Burlesque</title>
		<artist>Bob Dylan</artist>
		<country>USA</country>
		<company>Columbia</company>
		<price>10.90</price>
		<year>1985</year>
	</cd>
	<cd>
		<title>Hide your heart</title>
		<artist>Bonnie Tyler</artist>
		<country>UK</country>
		<company>CBS Records</company>
		<price>9.90</price>
		<year>1988</year>
	</cd>
	<cd>
		<title>Greatest Hits</title>
		<artist>Dolly Parton</artist>
		<country>USA</country>
		<company>RCA</company>
		<price>9.90</price>
		<year>1982</year>
	</cd>
	<cd>
		<title>Still got the blues</title>
		<artist>Gary Moore</artist>
		<country>UK</country>
		<company>Virgin records</company>
		<price>10.20</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Eros</title>
		<artist>Eros Ramazzotti</artist>
		<country>EU</country>
		<company>BMG</company>
		<price>9.90</price>
		<year>1997</year>
	</cd>
	<cd>
		<title>One night only</title>
		<artist>Bee Gees</artist>
		<country>UK</country>
		<company>Polydor</company>
		<price>10.90</price>
		<year>1998</year>
	</cd>
	<cd>
		<title>Sylvias Mother</title>
		<artist>Dr.Hook</artist>
		<country>UK</country>
		<company>CBS</company>
		<price>8.10</price>
		<year>1973</year>
	</cd>
	<cd>
		<title>Maggie May</title>
		<artist>Rod Stewart</artist>
		<country>UK</country>
		<company>Pickwick</company>
		<price>8.50</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Romanza</title>
		<artist>Andrea Bocelli</artist>
		<country>EU</country>
		<company>Polydor</company>
		<price>10.80</price>
		<year>1996</year>
	</cd>
	<cd>
		<title>When a man loves a woman</title>
		<artist>Percy Sledge</artist>
		<country>USA</country>
		<company>Atlantic</company>
		<price>8.70</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Black angel</title>
		<artist>Savage Rose</artist>
		<country>EU</country>
		<company>Mega</company>
		<price>10.90</price>
		<year>1995</year>
	</cd>
	<cd>
		<title>1999 Grammy Nominees</title>
		<artist>Many</artist>
		<country>USA</country>
		<company>Grammy</company>
		<price>10.20</price>
		<year>1999</year>
	</cd>
	<cd>
		<title>For the good times</title>
		<artist>Kenny Rogers</artist>
		<country>UK</country>
		<company>Mucik Master</company>
		<price>8.70</price>
		<year>1995</year>
	</cd>
	<cd>
		<title>Big Willie style</title>
		<artist>Will Smith</artist>
		<country>USA</country>
		<company>Columbia</company>
		<price>9.90</price>
		<year>1997</year>
	</cd>
	<cd>
		<title>Tupelo Honey</title>
		<artist>Van Morrison</artist>
		<country>UK</country>
		<company>Polydor</company>
		<price>8.20</price>
		<year>1971</year>
	</cd>
	<cd>
		<title>Soulsville</title>
		<artist>Jorn Hoel</artist>
		<country>Norway</country>
		<company>WEA</company>
		<price>7.90</price>
		<year>1996</year>
	</cd>
	<cd>
		<title>The very best of</title>
		<artist>Cat Stevens</artist>
		<country>UK</country>
		<company>Island</company>
		<price>8.90</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Stop</title>
		<artist>Sam Brown</artist>
		<country>UK</country>
		<company>A and M</company>
		<price>8.90</price>
		<year>1988</year>
	</cd>
	<cd>
		<title>Bridge of Spies</title>
		<artist>T`Pau</artist>
		<country>UK</country>
		<company>Siren</company>
		<price>7.90</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Private Dancer</title>
		<artist>Tina Turner</artist>
		<country>UK</country>
		<company>Capitol</company>
		<price>8.90</price>
		<year>1983</year>
	</cd>
	<cd>
		<title>Midt om natten</title>
		<artist>Kim Larsen</artist>
		<country>EU</country>
		<company>Medley</company>
		<price>7.80</price>
		<year>1983</year>
	</cd>
	<cd>
		<title>Pavarotti Gala Concert</title>
		<artist>Luciano Pavarotti</artist>
		<country>UK</country>
		<company>DECCA</company>
		<price>9.90</price>
		<year>1991</year>
	</cd>
	<cd>
		<title>The dock of the bay</title>
		<artist>Otis Redding</artist>
		<country>USA</country>
		<company>Atlantic</company>
		<price>7.90</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Picture book</title>
		<artist>Simply Red</artist>
		<country>EU</country>
		<company>Elektra</company>
		<price>7.20</price>
		<year>1985</year>
	</cd>
	<cd>
		<title>Red</title>
		<artist>The Communards</artist>
		<country>UK</country>
		<company>London</company>
		<price>7.80</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Unchain my heart</title>
		<artist>Joe Cocker</artist>
		<country>USA</country>
		<company>EMI</company>
		<price>8.20</price>
		<year>1987</year>
	</cd>
</catalog>

运行实例 »

点击 "运行实例" 按钮查看在线实例

上面的代码会在 CD 的价格高于 10 时向 "Artist" 列添加粉色的背景颜色。

另一个实例

这是另外一个包含两个 <xsl:when> 元素的实例：

实例

<?xml version="1.0" encoding="ISO-8859-1"?>

<catalog>
	<cd>
		<title>Empire Burlesque</title>
		<artist>Bob Dylan</artist>
		<country>USA</country>
		<company>Columbia</company>
		<price>10.90</price>
		<year>1985</year>
	</cd>
	<cd>
		<title>Hide your heart</title>
		<artist>Bonnie Tyler</artist>
		<country>UK</country>
		<company>CBS Records</company>
		<price>9.90</price>
		<year>1988</year>
	</cd>
	<cd>
		<title>Greatest Hits</title>
		<artist>Dolly Parton</artist>
		<country>USA</country>
		<company>RCA</company>
		<price>9.90</price>
		<year>1982</year>
	</cd>
	<cd>
		<title>Still got the blues</title>
		<artist>Gary Moore</artist>
		<country>UK</country>
		<company>Virgin records</company>
		<price>10.20</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Eros</title>
		<artist>Eros Ramazzotti</artist>
		<country>EU</country>
		<company>BMG</company>
		<price>9.90</price>
		<year>1997</year>
	</cd>
	<cd>
		<title>One night only</title>
		<artist>Bee Gees</artist>
		<country>UK</country>
		<company>Polydor</company>
		<price>10.90</price>
		<year>1998</year>
	</cd>
	<cd>
		<title>Sylvias Mother</title>
		<artist>Dr.Hook</artist>
		<country>UK</country>
		<company>CBS</company>
		<price>8.10</price>
		<year>1973</year>
	</cd>
	<cd>
		<title>Maggie May</title>
		<artist>Rod Stewart</artist>
		<country>UK</country>
		<company>Pickwick</company>
		<price>8.50</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Romanza</title>
		<artist>Andrea Bocelli</artist>
		<country>EU</country>
		<company>Polydor</company>
		<price>10.80</price>
		<year>1996</year>
	</cd>
	<cd>
		<title>When a man loves a woman</title>
		<artist>Percy Sledge</artist>
		<country>USA</country>
		<company>Atlantic</company>
		<price>8.70</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Black angel</title>
		<artist>Savage Rose</artist>
		<country>EU</country>
		<company>Mega</company>
		<price>10.90</price>
		<year>1995</year>
	</cd>
	<cd>
		<title>1999 Grammy Nominees</title>
		<artist>Many</artist>
		<country>USA</country>
		<company>Grammy</company>
		<price>10.20</price>
		<year>1999</year>
	</cd>
	<cd>
		<title>For the good times</title>
		<artist>Kenny Rogers</artist>
		<country>UK</country>
		<company>Mucik Master</company>
		<price>8.70</price>
		<year>1995</year>
	</cd>
	<cd>
		<title>Big Willie style</title>
		<artist>Will Smith</artist>
		<country>USA</country>
		<company>Columbia</company>
		<price>9.90</price>
		<year>1997</year>
	</cd>
	<cd>
		<title>Tupelo Honey</title>
		<artist>Van Morrison</artist>
		<country>UK</country>
		<company>Polydor</company>
		<price>8.20</price>
		<year>1971</year>
	</cd>
	<cd>
		<title>Soulsville</title>
		<artist>Jorn Hoel</artist>
		<country>Norway</country>
		<company>WEA</company>
		<price>7.90</price>
		<year>1996</year>
	</cd>
	<cd>
		<title>The very best of</title>
		<artist>Cat Stevens</artist>
		<country>UK</country>
		<company>Island</company>
		<price>8.90</price>
		<year>1990</year>
	</cd>
	<cd>
		<title>Stop</title>
		<artist>Sam Brown</artist>
		<country>UK</country>
		<company>A and M</company>
		<price>8.90</price>
		<year>1988</year>
	</cd>
	<cd>
		<title>Bridge of Spies</title>
		<artist>T`Pau</artist>
		<country>UK</country>
		<company>Siren</company>
		<price>7.90</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Private Dancer</title>
		<artist>Tina Turner</artist>
		<country>UK</country>
		<company>Capitol</company>
		<price>8.90</price>
		<year>1983</year>
	</cd>
	<cd>
		<title>Midt om natten</title>
		<artist>Kim Larsen</artist>
		<country>EU</country>
		<company>Medley</company>
		<price>7.80</price>
		<year>1983</year>
	</cd>
	<cd>
		<title>Pavarotti Gala Concert</title>
		<artist>Luciano Pavarotti</artist>
		<country>UK</country>
		<company>DECCA</company>
		<price>9.90</price>
		<year>1991</year>
	</cd>
	<cd>
		<title>The dock of the bay</title>
		<artist>Otis Redding</artist>
		<country>USA</country>
		<company>Atlantic</company>
		<price>7.90</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Picture book</title>
		<artist>Simply Red</artist>
		<country>EU</country>
		<company>Elektra</company>
		<price>7.20</price>
		<year>1985</year>
	</cd>
	<cd>
		<title>Red</title>
		<artist>The Communards</artist>
		<country>UK</country>
		<company>London</company>
		<price>7.80</price>
		<year>1987</year>
	</cd>
	<cd>
		<title>Unchain my heart</title>
		<artist>Joe Cocker</artist>
		<country>USA</country>
		<company>EMI</company>
		<price>8.20</price>
		<year>1987</year>
	</cd>
</catalog>

运行实例 »

点击 "运行实例" 按钮查看在线实例

上面的代码会在 CD 的价格高于 10 时向 "Artist" 列添加粉色的背景颜色，并在 CD 的价格高于 9 且低于等于 10 时向 "Artist" 列添加灰色的背景颜色。