xsl template : Adding calculation in a group header

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Topic	xsl template : Adding calculation in a group header
Output	Groupe Name + Result of formula

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Step	Description
1	Create the template <xsl:template name="FieldRef_Text_body.Display_x0020_Name" ddwrt:dvt_mode="body" match ="FieldRef[@Name='Display_x0020_Name']" mode="Text_body" ddwrt:ghost="" xmlns:ddwrt2="urn:frontpage:internal"> <xsl:param name="thisNode" select="."/> <xsl:choose> <xsl:when test="@AutoHyperLink='TRUE'"> <xsl:value-of select="$thisNode/@*[name()=current()/@Name]" disable-output-escaping ="yes"/> </xsl:when> <xsl:otherwise> <xsl:value-of select="$thisNode/@*[name()=current()/@Name]"/></xsl:otherwise> </xsl:choose> </xsl:template> this is the default template create by sharepoint 2010
2	Add the calculation part (after param and before choose) 1° we will store in a variable the selection criterium for the calculation <xsl:variable name="cname" select="$thisNode/@Display_x0020_Name" /> 2° we will select only the rows that match our criterium in the calculation <xsl:variable name="WD select="sum($Rows/Row[@Display_x0020_Name = $cname]/@Work_x0020_Days)"/>
3	Add the calculation result (after the xsl:choose closing tag <xsl:value-of select="$WD"/>
4	If you want to add space between info, just add the following <xsl:text disable-output-escaping="yes" ddwrt:nbsp-preserve="yes" xmlns:ddwrt="http://schemas.microsoft.com/WebParts/v2/DataView/runtime">&nbsp;</xsl:text>