HowTo Select Nodes using child element criteria

[kmeixner]

Hi,

If I am not mistaken, your XPath syntax is correct, but apparentlly OpenLaszlo does not interpret it correctly:

(canvas.myData.getPointer()).xpathQuery("/myXML/person[lastName='Simpson']/lastName")

Returns:

«Array(3)#54| [<lastName>Simpson</lastName>, <lastName>Simpson</lastName>, <lastName>Burns</lastName>]»

You could get an array of all of the last names and figure out which one's are matches using:

(canvas.myData.getPointer()).xpathQuery("/myXML/person/lastName/text()")

Which would return:

«Array(3)#55| ['Simpson', 'Simpson', 'Burns']»

or alternatively use attributes instead:

<canvas width="1000" height="584" debug="true">

<dataset name="myData">
<myXML>
<person show="simpsons" firstName='Homer' lastName='Simpson'>
</person>
<person show="simpsons" firstName='Marge' lastName='Simpson'>
</person>
<person show="simpsons" firstName='Montgomery' lastName='Burns'>
</person>
</myXML>
</dataset>

</canvas>

(canvas.myData.getPointer()).xpathQuery("/myXML/person[@lastName='Simpson']")

Returns:

«Array(2)#0| [<person show="simpsons" firstName="Homer" lastName="Simpson"/>, <person show="simpsons" firstName="Marge" lastName="Simpson"/>]»


OpenLaszlo's implementation of XPath is incomplete, possibly that is why your original XPath query does not work.

Kevin