Subject: Re: [xsl] How do i check null values in a for each??? From: Jeni Tennison <jeni@xxxxxxxxxxxxxxxx> Date: Tue, 30 Apr 2002 13:14:42 +0100 |
Hi Suman, > Please see the following snippet: > > <xsl:for-each select="attr[@name='addrdesc1' or @name='AddrDesc1']"> > <td>  <input type="text"> > <xsl:attribute name="name">txtAddressDesc</xsl:attribute> > <xsl:attribute name="value"><xsl:value-of select="value"></xsl:value-of></xsl:attribute> > </input> > </td> > </xsl:for-each> > > Now consider for instance the above for-each does'nt return a value > at all. I.e there is'nt an attribute called addrdesc1 in the xml > schema response So obviously it does't enter the for-each and does > NOT display the text box. > > but i still want to display an empty text box to the user > in the XSL , How do i do this??? If you try to select a node set, and test that node set, you'll get 'true' if the node set contains some nodes, and 'false' if it doesn't. So in this case you can do: <xsl:variable name="attrs" select="attr[@name = 'addrdesc1' or @name = 'AddrDesc1']" /> <xsl:choose> <xsl:when test="$attrs"> <td>   <input type="text" name="txtAddressDesc" /> </td> </xsl:when> <xsl:otherwise> <xsl:for-each select="$attrs"> <td>   <input type="text" name="txtAddressDesc" value="{value}" /> </td> </xsl:for-each> </xsl:otherwise> </xsl:choose> If, as I suspect, there can only be one attr in this context whose name attribute is either 'addrdesc1' or 'AddrDesc1', then it would be simpler to write: <xsl:variable name="attr" select="attr[@name = 'addrdesc1' or @name = 'AddrDesc1']" /> <td>   <input type="text" name="txtAddressDesc"> <xsl:if test="$attr"> <xsl:attribute name="value"> <xsl:value-of select="$attr/value" /> </xsl:attribute> </xsl:if> </input> </td> Although probably in this case simply doing the following would work just as well: <td>   <input type="text" name="txtAddressDesc" value="{attr[@name = 'addrdesc1' or @name = 'AddrDesc1']/value}" /> </td> Cheers, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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