Hi Chad

I use the macro option with the following xslt.  I only allow the user to pick an image, set the width (so I can constrain the proportions) and alt text.  Hope this helps.

Cheers
Evan

<xsl:param name="currentPage"/>

<xsl:variable name="mediaCurrent" select="/macro/mediaCurrent"/>
<xsl:variable name="imageWidth" select="/macro/imageWidth"/>
<xsl:variable name="imageAlt" select="/macro/imageAlt"/>

<xsl:template match="/">

  <xsl:variable name="imgUrl" select="$mediaCurrent/node/data [@alias='umbracoFile']"/>
    <xsl:if test="$imgUrl != ''">       
        <img>
            <xsl:attribute name="src">
                <xsl:text>/umbraco/ImageGen.ashx?image=</xsl:text>
                <xsl:value-of select="$imgUrl"/>   
                <xsl:text>&amp;constrain=true</xsl:text>
                <xsl:text>&amp;width=</xsl:text>
                <xsl:value-of select="$imageWidth"/>
            </xsl:attribute>

            <xsl:attribute name="alt">
                <xsl:value-of select="$imageAlt"/>
            </xsl:attribute>
        </img>
        </xsl:if>

</xsl:template>

Thanks for the XSLT. I hadn't seen this....so I created my own. A few more parameters. Added height (althought it is still automatically constraining), alignment (although I'd love the macro property to be a dropdown....), and ability to make it a thumbnail with a link to the larger image.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [
  <!ENTITY nbsp "&#x00A0;">
]>
<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"
    exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ">


  <xsl:output method="xml" omit-xml-declaration="yes"/>
  <xsl:variable name="mediaID" select="/macro/mediaID"/>
  <xsl:variable name="altText" select="/macro/altText"/>
  <xsl:variable name="align" select="/macro/align"/>
  <xsl:variable name="constrain">&amp;contrain=true</xsl:variable>
  <xsl:variable name="makeThumbnail">
    <xsl:choose>
        <xsl:when test="/macro/makeThumbnail != ''">
            <xsl:value-of select="1" />
        </xsl:when>
        <xsl:otherwise>
            <xsl:value-of select="0" />
        </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>

  <xsl:variable name="width">
    <xsl:if test="/macro/width != ''">&amp;width=<xsl:value-of select="/macro/width" /></xsl:if>
  </xsl:variable>
  <xsl:variable name="height">
    <xsl:if test="/macro/height != ''">&amp;height=<xsl:value-of select="/macro/height" /></xsl:if>
  </xsl:variable>


  <xsl:param name="currentPage"/>

  <xsl:template match="/">
    <xsl:if test="$mediaID != '' ">
        <xsl:variable name="navigateUrl">/Umbraco/ImageGen.ashx?image=<xsl:value-of select="umbraco.library:GetMedia($mediaID/node/@id, 'false')/data [@alias = 'umbracoFile']" /></xsl:variable>
    <xsl:choose>

        <xsl:when test="$makeThumbnail = 1">
            <xsl:element name="a">
                <xsl:attribute name="href">
                    <xsl:value-of select="$navigateUrl" />
                </xsl:attribute>
                <xsl:call-template name="createImage">
                    <xsl:with-param name="imageUrl" select="$navigateUrl" />
                </xsl:call-template>
            </xsl:element>

        </xsl:when>
        <xsl:otherwise>
            <xsl:call-template name="createImage">
                <xsl:with-param name="imageUrl" select="$navigateUrl" />
            </xsl:call-template>
        </xsl:otherwise>
    </xsl:choose>
    </xsl:if>
    </xsl:template>


<xsl:template name="createImage">
    <xsl:param name="imageUrl" />

    <xsl:element name="img">
        <xsl:attribute name="src">
            <xsl:value-of select="$imageUrl" /><xsl:value-of select="$width" /><xsl:value-of select="$height" /><xsl:value-of select="$constrain" />
        </xsl:attribute>                  
        <xsl:if test="$align != ''">                      
            <xsl:attribute name="align">                          
                <xsl:value-of select="$align" />                      
            </xsl:attribute>
        </xsl:if>
            <xsl:attribute name="alt">
            <xsl:choose>
                <xsl:when test="$altText != ''">
                    <xsl:value-of select="$altText"/>
                </xsl:when>
                <xsl:otherwise>
                    <xsl:value-of select="$currentPage/@nodeName"/>
                </xsl:otherwise>
            </xsl:choose>
        </xsl:attribute>
    </xsl:element>
</xsl:template>
</xsl:stylesheet>

  <xsl:variable name="makeThumbnail">
    <xsl:choose>
        <xsl:when test="/macro/makeThumbnail != ''">
            <xsl:value-of select="/macro/makeThumbnail" />
        </xsl:when>
        <xsl:otherwise>
            <xsl:value-of select="0" />
        </xsl:otherwise>
    </xsl:choose>
  </xsl:variable>d'oh. one small bug - 

What is happening if I keep getting a blank URL?

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