Question

I have an object with data annotations for serialization. It has a boolean property which is true (tested with debugger) so 100% certain, but when I have this in the xslt:

<xsl:for-each select="order/Coupons/orderedCoupons" >
    <tr>
        <td>Discount <xsl:value-of select="@code"/></td>
        <td>
            <xsl:choose>
                <xsl:when test="@isperc='true'">
                    <xsl:value-of select="@disvalue"/>%
                </xsl:when>
                <xsl:otherwise>Epic fail
                    &#8364; <xsl:value-of select="format-number(@disvalue, '#.###,00', 'euro')" />
                </xsl:otherwise>
            </xsl:choose>
        </td>
    </tr>
</xsl:for-each>

It always displays epic fail, so the test always fails. I also have tried:

• @isperc=’true’
• @isperc=1
• boolean(@isperc)
• @isperc = true()

some more background info: it is an asp.net object which I serialize with build in data annotations. The XSLT support in .Net is 1.0 only.

edit piece of my coupon.cs

[XmlAttribute("isperc")]
public bool IsPerc
{
    get { return _isPerc; }
}

it is not nullable, but as the 2nd commentor pointed out, what is the value of <xsl:value-of select="@isperc"/> well, it seems empty. it parses as nothing in the html. Not a whitespace, not null etc. that is strange because the boolean is true…

edit2 this also outputs nothing <xsl:value-of select="string(@isperc)"/>, so this also fails <xsl:when test="string(@isperc) = 'true'">

Answer 1

<xsl:when test="@IsPerc = true()">

should match a C# boolean type.

A workaround I’ve seen is to convert the boolean value to a number, though;

<xsl:when test="number(@IsPerc) > 0">