xsl:if condition

[Andrea Maschio]

Hi, i have a terrible noobie frustration formatting an XML file like this:

<Dipendente Id="1" Anno="2003" Nome="pippo" Cognome="pippi" Nato_il="10/03" Email="" Esito="ok"/>

On the XSLt file relayed to this XML, i wrote in green the attribute value if Attribute "Esito" is "Ok".

I mean, something, like this:

<!--xsl:if test="@Esito != 'Ok' ">
<span style="cursor:hand; font-family:Verdana; font-size:9"> <xsl:value-of select="."/> </span> </xsl:if!-->

It seems that the test expression is always evaluated false even if i set the attribute value to ok, OK, or even anything else. Is there something wrong with this?

Please Help, I can't get it out!

 

[Martin Boehm]

<!--xsl:if test="@Esito != 'Ok' ">
<span style="cursor:hand; font-family:Verdana; font-size:9"> <xsl:value-of select="."/> </span> </xsl:if!-->

Despite the fact that this is a comment and therefore cannot do _anything_... ;-)

XML is case-sensitive. 'Ok' is different from 'OK' or 'oK'. I think this causes your trouble.

Four ways to solve it:
1. Make sure it is alwalys 'OK' and nothing else, and
then test for "@Esito != 'OK'"
2. Test for all combinations of capital and non-capital letters. This is idiotic, but in case your word is only two chars long, it is still a possibility. (OK, then it is four possibilities. *g*)
3. Work with a number, if you can.
test="number(@Esito) != 0"
4. Utilize the XPath translate function to translate
everything into capitals or non-capitals.

Martin

 

[Andrea Maschio]

Despite the fact that this is a comment and therefore cannot do

_anything_... ;-)

Yes, sorry, it was a Typo : )

Ok, that's exactly:

<xsl:if test="number(@Esito) = 0 ">

I tried this solution, setting the value of @Esito to 0, to 1 or anything else.

Xslt debugger show me the right value, but i can't get to get the test expression evaluated as True.

Four ways to solve it:
1. Make sure it is alwalys 'OK' and nothing else, and
then test for "@Esito != 'OK'"

I tried that : (

2. Test for all combinations of capital and non-capital letters. This is idiotic, but in case your word is only two chars long, it is still a possibility.

Tried also that

(OK, then it is four possibilities. *g*)
3. Work with a number, if you can.
test="number(@Esito) != 0"

I tried

4. Utilize the XPath translate function to translate
everything into capitals or non-capitals.

I tried also this:

<xsl:when test="string(@Esito) != 'Ok' "> // this is always evaluated true, despite the value of @Esito

Gosh, i'm sorry, but i'm a newbie, i really don't understand.

THanks for your help

Andrea Maschio

 

[Martin Boehm]

Gosh, i'm sorry, but i'm a newbie, i really don't understand.

I dont, either. I don't know what *exactly* you do, but it works for me:

---test.xml------------------------------------------
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="test.xsl"?>
<root>
<Dipendente Id="1" Esito="ok"/>
<Dipendente Id="2" Esito="not ok"/>
<Dipendente Id="3" Esito="ok"/>
</root>

combined with...

---test.xsl------------------------------------------
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/root"> <body> <xsl:apply-templates select="Dipendente"/> </body> </xsl:template> <xsl:template match="Dipendente"> <div> <xsl:value-of select="@Id"/> <xsl:text> is </xsl:text> <xsl:choose> <xsl:when test="@Esito = 'ok'"> <xsl:value-of select="@Esito"/> </xsl:when> <xsltherwise> <b><xsl:value-of select="@Esito"/></b> </xsltherwise> </xsl:choose> </div> </xsl:template> </xsl:stylesheet>

produces...

---Result--------------------------------------------
<?xml version="1.0" encoding="UTF-16"?>
<body>
<div>1 is ok</div>
<div>2 is
<b>not ok</b>
</div>
<div>3 is ok</div>
</body>

This is more or less what you want. If you take the same test (xsl:if or xsl:when, that makes no difference) and do not get the same result, you must be in error elsewhere.

Martin

 

[Andrea Maschio]

The problem is exactly that i didn't know how to use templates. I erroneously though it was enough to apply the condition to every <xsl:for-each name="Dipendente">.

Now i'm safe from going crazy, phew!

Can you indicate me where i could find a nice tutorial on this argoment? THe problem was that making xslt with easy editors, i have not a full control on its processes.

THank you very much for your precious helping!

Andrea

 

[Martin Boehm]

Hi Andrea,

The problem is exactly that i didn't know how to use templates.

I thought so.

I erroneously though it was enough to apply the condition to every <xsl:for-each name="Dipendente">.

It is <xsl:for-each select... not name ;-)

But I am afraid I still can't picture your problem. Can you post a example snippet of your XML and XSL?

Can you indicate me where i could find a nice tutorial on this argoment?

If you only could be a bit more specific. Which argument? You might want to read into XPath at first. I have no URL at hand, but Google will.

THe problem was that making xslt with easy editors, i have not a full control on its processes.

Dump your "easy" editor and use a more appropriate tool (Xselerator from www.topxml.com has proven to be _very_ useful, if you work in a Windows environment), or a plain text editor with XML syntax highlighting. At least if you want to really learn it.

Martin

 

[Andrea Maschio]

The problem is exactly that i didn't know how to use templates.

I thought so.

It is <xsl:for-each select... not name ;-)

It was a Type error, but you are perfectly right: how can you understand if i don't spell correctly words? : P

But I am afraid I still can't picture your problem. Can you post a example snippet of your XML and XSL?

My Xml finally worked, elimininating this tag <xsl:for-each select="NodeName"> and creating a template for this node. After i recall the template from inside <body></body>. That was right?

Ok, so i thought "Now I Understood!". But I was still not right. I've got another XML file, it's attached at the end of this post with his xslt. I was trying to colour a cell only if the relative node is not empty. In this case still doesn't work.

Dump your "easy" editor and use a more appropriate tool (Xselerator from www.topxml.com has proven to be _very_ useful, if you work in a Windows environment), or a plain text editor with XML syntax highlighting. At least if you want to really learn it.

I surely want to learn this meta language, but like you know, sometimes it happens you have to work on a tecnology, and then you have the calm and the time to learn it. I used XMLSPy, with a stylesheet designer. It seems to me to be very easy to use, but i don'to know how to set choice upon two conditions, for example.

Here's the file, thanks a lot Martin for your help ^^

------------XML File---------------------------------------------- <!DOCTYPE Import SYSTEM "conti.dtd"> <?xml-stylesheet type="text/xsl" href="stileconti.xslt"?> <Import> <Row> <Data_operazione> 07/10/2003 </Data_operazione> <Data_valuta> 12/09/2003 </Data_valuta> <Importo_debito></Importo_debito> <Importo_credito>9,8</Importo_credito> <Causale>CausaleText</Causale> </Row> <Row> <Data_operazione> 08/10/2003 </Data_operazione> <Data_valuta> 09/09/2003 </Data_valuta> <Importo_debito>30</Importo_debito> <Importo_credito> </Importo_credito> <Causale>CausaleText</Causale> </Row> </Import>

--------end of XML File---------------------------------------------
------------xslt file----------
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="/"> <html> <head/> <body> <xsl:for-each select="Import"> <xsl:apply-templates select="Row"/> </xsl:for-each> </body> </html> </xsl:template>

<xsl:template match="Row">
<xsl:if test="position=1">
<table border="1">
<thead>
<tr>
<td style="background-color:#004080">
<span style="color:white; font-family:Verdana; font-size:9; font-weight:bold; text-transform:capitalize">Data operazione</span> </td> <td style="background-color:#004080"> <span style="color:white; font-family:Verdana; font-size:9; font-weight:bold; text-transform:capitalize">Data valuta</span> </td> <td style="background-color:#004080"> <span style="color:white; font-family:Verdana; font-size:9; font-weight:bold; text-transform:capitalize">Importo debito</span> </td> <td style="background-color:#004080"> <span style="color:white; font-family:Verdana; font-size:9; font-weight:bold; text-transform:capitalize">Importo credito</span> </td> <td style="background-color:#004080"> <span style="color:white; font-family:Verdana; font-size:9; font-weight:bold; text-transform:capitalize">Causale</span> </td> </tr> </thead> <tbody> <xsl:for-each select="../Row"> <tr> <td style="background-color:#C0C0C0"> <xsl:for-each select="Data_operazione"> <span style="font-family:Verdana; font-size:9"> <xsl:apply-templates/> </span> </xsl:for-each> </td> <td style="background-color:#D3D3D3"> <xsl:for-each select="Data_valuta"> <span style="font-family:Verdana; font-size:9"> <xsl:apply-templates/> </span> </xsl:for-each> </td> <td style="background-color:#D90000"> <xsl:for-each select="Importo_debito"> <!--------------------Here it is the "choose"---------------------> <xsl:choose > <xsl:when test="Importo_debito != '' ">mycode for coloured cell</xsl:when> </xsl:choose> <!----------------------------------------------------------------> <span style="color:white; font-family:Verdana; font-size:9"> <xsl:apply-templates/> </span> <xsl:choose><xsl:when test="@Importo_debito != '' "> </xsl:when></xsl:choose> </xsl:for-each> </td> <td style="background-color:#008000"> <xsl:for-each select="Importo_credito"> <span style="color:#FFFFFF; font-family:Verdana; font-size:9"> <xsl:apply-templates/> </span> </xsl:for-each> </td> <td> <xsl:for-each select="Causale"> <span style="font-family:Verdana; font-size:9; text-transform:lowercase"> <xsl:apply-templates/> </span> </xsl:for-each> </td> </tr> </xsl:for-each> </tbody> </table> </xsl:if> </xsl:template>

</xsl:stylesheet>

 

[Patrick TJ McPhee]

[...]

% Ok, so i thought "Now I Understood!". But I was still not right. I've % got another XML file, it's attached at the end of this post with his % xslt. I was trying to colour a cell only if the relative node is not % empty. In this case still doesn't work.

[...]

% <!DOCTYPE Import SYSTEM "conti.dtd">
% <?xml-stylesheet type="text/xsl" href="stileconti.xslt"?> % <Import> % <Row> % <Data_operazione> 07/10/2003 </Data_operazione> % <Data_valuta> 12/09/2003 </Data_valuta> % <Importo_debito></Importo_debito> % <Importo_credito>9,8</Importo_credito> % <Causale>CausaleText</Causale> % </Row> % <Row> % <Data_operazione> 08/10/2003 </Data_operazione> % <Data_valuta> 09/09/2003 </Data_valuta> % <Importo_debito>30</Importo_debito> % <Importo_credito> </Importo_credito> % <Causale>CausaleText</Causale> % </Row> % </Import>

% <?xml version="1.0" encoding="UTF-8"?>
% <xsl:stylesheet version="1.0"
% xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> % <xsl:template match="/"> % <html> % <head/> % <body> % <xsl:for-each select="Import">

It's nothing to do with your problem, but since there can be only one Import, you don't need this xsl:for-each.

% <xsl:apply-templates select="Row"/>

[...]

% <xsl:for-each select="Importo_debito">
% <!--------------------Here it is the "choose"---------------------> % <xsl:choose > % <xsl:when test="Importo_debito != '' ">mycode for coloured % cell</xsl:when> % </xsl:choose> % <!---------------------------------------------------------------->

The problem here is that you're testing inside an xsl:for-each loop. The context is set to each node returned by the select expression in turn. What you want is

test = ". != ''"

 

[Andrea Maschio]

The problem here is that you're testing inside an xsl:for-each loop.

The context is set to each node returned by the select expression in turn. What you want is

test = ". != ''"

Gosh! Now i feel very stupid! I though that in XML this

<node> </node>

was exactly the same as

<node></node>

It's qbvious that the
<xsl:if test ". != '' ">
couldn't work, because it should have been

<xsl:if test ". != ' ' ">

Gosh again..

It's sunday morning 8.pm

thank you very much for helping

Andrea

 

[Martin Boehm]

It's qbvious that the
<xsl:if test ". != '' ">
couldn't work, because it should have been

<xsl:if test ". != ' ' ">

No, it should be
<xsl:if test "normalize-space(.) != ''">

Martin