conditional output

AndersR · August 14th, 2003, 09:54 AM

Its been too long since i read Mikes book from A-Z so this one should be easy for you XSLT sharks out there :D

I want my HTML to only output images if the element <NavigationGraphic> is present. Else i want to output content of <title>.

How do i test if the element NavigationGraphic is empty?

XML:

<Navigation>
       ...
       <NavigationItem ParentId="100" Level="1" ShowInNavigation="true" Selected="false" Expanded="false" LoginRequired="false">
           <PageId>101</PageId>
           <Title>The page title</Title>
           <Url>sw101.asp</Url>
           <NavigationGraphic>Url to the navigation graphic</NavigationGraphic>
           <NavigationGraphicMouseOver>Url to the navigation graphics mouse-over image</NavigationGraphicMouseOver>
           <NavigationSelectedGraphic>url to the selected navigation graphic</NavigationSelectedGraphic>
           <NavigationSelectedGraphicMouseOver>url to the selected navigation graphics mouse-over image</NavigationSelectedGraphicMouseOver>
       </NavigationItem>
       ...
   </Navigation>

XSLT:
<xsl:template match="/Navigation">
...
<xsl:apply-templates select="NavigationItem[@Level='1' and @ShowInNavigation='true']"/>
...
</xsl:template>

<xsl:template match="NavigationItem[@Selected='false' and @Level='1' and @Expanded='false']">
...
              <xsl:choose>

                  <xsl:when test="string-length(NavigationGraphic)=0">
                    <xsl:apply-templates select="Title"/>

                </xsl:when>

                <xsl:otherwise>
                    <img>
                        <xsl:attribute name="src">
                               <xsl:value-of select="NavigationGraphic"/>
                        </xsl:attribute>
                        <xsl:attribute name="border">
                               <xsl:value-of select="'0'"/>
                        </xsl:attribute>
                    </img>

                </xsl:otherwise>

            </xsl:choose>
...
</xsl:template>

thanx
Anders

armmarti · August 15th, 2003, 12:01 AM

Quote:

quote:
I want my HTML to only output images if the element <NavigationGraphic> is present. Else i want to output content of <title>.

How do i test if the element NavigationGraphic is empty?

In fact "<NavigationGraphic> is present" is quite different from "NavigationGraphic is empty". So, here are that 2 XPath expressions:

Code:

<xsl:if test="not(NavigationGraphic)">
   NavigationGraphic element is absent
</xsl:if>


<xsl:if test="normalize-space(NavigationGraphic) = ''">
  NavigationGraphic element's content is empty
</xsl:if>

Regards,
Armen