XPath Expression in value attribute of xforms:setvalue

Phani,

When you use the 'ref' attribute in <xforms:setvalue>, it already puts you
within the context of the <selected> element in your instance. Since there
is no additional <selected> element within your <selected> elements, the
first part of the if statement fails, and thus it is set to 'true' the first
time but is not changed back to 'false' after that. This is where the "."
XPath operator helps, to refer to the current node.

I'll bet if you change your <xforms:setvalue> markup to:


<xforms:setvalue ref="selected" value="if(. = 'true') then 'false'
else 'true'"/>


it will work just fine! And let me know if anything I said is unclear, or if
what I said doesn't work.


--Philip

Phani Sajja wrote:
>
> Hi all,
>        I had an instance called
> <instance xmlns="">
>   <record>
>   <selected>false</selected>
>   </record>
>   <record>
>   <selected>false</selected>
>   </record>
>   <record>
>   <selected>false</selected>
>   </record>
>   </instance>
> I want to change this value when ever I click a button.
>    <xforms:trigger appearance="minimal" id="confirm-delete-trigger">
>   <xforms:label>Select</xforms:label>
>   <xforms:action ev:event="DOMActivate">
>   <xforms:setvalue ref="selected" value="if(selected='true') then 'false'
> else 'true'"/>
>   <xforms:send submission="select"/>
>   </xforms:action>
>   </xforms:trigger>
>
> its value is changing for the first time only. how do i repeatedly change
> the value between true and false by clicking select button.
>
> --
> Phani. S
> M.Tech(Software Engineering)
> Motilal Nehru National Institute of Technology
> (+91) 9010093398
>
>

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