Question

I have run into a problem with XSLT transformation. I have input XML as bellow:

<root>
    <photoname>image</photoname>
    <photocount>3</photocount>
</root>

and i need transform it to following XML:

<root>
    <response>
        <images>
            <image>
                <small>image_1_120.jpg</small>              
            </image>
        </images>
        <images>
            <image>
                <small>image_2_120.jpg</small>              
            </image>
        </images>
        <images>
            <image>
                <small>image_3_120.jpg</small>              
            </image>
        </images>
    </response> 
</root>

Is it possble to do with XSLT(or with C# functions in XSLT)?

Answer 1

You could achieve this in XSLT with a recursize template to iterate based on the photocount element

Try the following XSLT

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="xml" indent="yes"/>

   <xsl:template match="root">
      <root>
         <response>
            <xsl:call-template name="photo">
               <xsl:with-param name="name" select="photoname"/>
               <xsl:with-param name="count" select="photocount"/>
            </xsl:call-template>
         </response>
      </root>
   </xsl:template>

   <xsl:template name="photo">
      <xsl:param name="name"/>
      <xsl:param name="count"/>
      <xsl:param name="current" select="1" />
      <images>
         <image>
            <small>
               <xsl:value-of select="concat($name, '_', $current, '_120.jpg')"/>
            </small>
         </image>
      </images>
      <xsl:if test="not($current >= $count)">
         <xsl:call-template name="photo">
            <xsl:with-param name="name" select="$name"/>
            <xsl:with-param name="count" select="$count"/>
            <xsl:with-param name="current" select="$current + 1"/>
         </xsl:call-template>
      </xsl:if>
   </xsl:template>
</xsl:stylesheet>

When applied to your sample XML, the following is output:

<root>
   <response>
      <images>
         <image>
            <small>image_1_120.jpg</small>
         </image>
      </images>
      <images>
         <image>
            <small>image_2_120.jpg</small>
         </image>
      </images>
      <images>
         <image>
            <small>image_3_120.jpg</small>
         </image>
      </images>
   </response>
</root>

Note that I didn’t know how the _120 suffix was generated, so I had to hard-code it in the XSLT.