Nested Choose

Ryan Moore · November 9th, 2007, 12:44 PM

Snippet
<xsl:when test="@Type='13'">
                  <xsl:choose>
                    <xsl:when test="/Categories[@Id]='352'">
                      <a target="_self">
                        <xsl:attribute name="href">
                          default.aspx?Page=141&category.Categories.1=<x sl:value-of select="Categories/@Id"/>&centerContent.Id.0=<xsl:value-of select="@Id"/>
                        </xsl:attribute>

                        <xsl:value-of select="@Name"/>
                      </a>
                    </xsl:when>
                    <xsl:otherwise>
                      <a target="_self">
                        <xsl:attribute name="href">
                          default.aspx?Page=75&category.Categories.1=<xs l:value-of select="Categories/@Id"/>&centerContent.Id.0=<xsl:value-of select="@Id"/>
                        </xsl:attribute>

                        <xsl:value-of select="@Name"/>
                      </a>
                    </xsl:otherwise>
                  </xsl:choose>
                </xsl:when>

Based on the following XML:
<Root>
  <AnyContent Id="10223" Name="About the Falls Clinic" Type="13" Owner="371" Description="A comprehensive, interdisciplinary assessment and rehabilitative outpatient treatment program." DatePublished="2007-05-23T13:28:06.997" EffectiveDate="1900-01-01T00:00:00" ExpiryDate="2079-01-01T00:00:00">
    <Categories Id="95" Name="Geriatric Day Hospital and Falls Clinic" />
  </AnyContent>
  <AnyContent Id="17160" Name="Adult Medical - Surgical Nursing Program" Type="13" Owner="4386" Description="The Adult Medical-Surgical Nursing Program (AMSNP) is a performance-based certification program that prepares registered nurses for the professional practice of medical-surgical nursing. " DatePublished="2007-07-17T10:31:54.130" EffectiveDate="1900-01-01T00:00:00" ExpiryDate="2079-01-01T00:00:00">
    <Categories Id="352" Name="Registered Nurses Professional Development Centre (RNPDC)" />
  </AnyContent>
  <AnyContent Id="5736" Name="Adult Medical-Surgical Nursing Program Content Outline" Type="5" Owner="4386" Description="Adult Medical-Surgical Nursing Program Content Outline" DatePublished="2007-04-27T14:34:14.137" EffectiveDate="1900-01-01T00:00:00" ExpiryDate="2079-01-01T00:00:00">
    <Categories Id="352" Name="Registered Nurses Professional Development Centre (RNPDC)" />
  </AnyContent>
</Root>

I'm having an issue in my XSL on my 2nd when condition. It is skipping over the condition /Categories[@Id]='352' and going directly to the otherwise statement when the category is 352. What am i missing here?

The desired output would be to render the first condition instead of bypassing it to the otherwise. I am running on WinXP and using MS Visual Web Dev. Express.

mhkay · November 9th, 2007, 01:24 PM

It's that "/". When you write "/Categories", you're referring to a Categories element that's the outermost element of the document.

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

samjudson · November 9th, 2007, 01:26 PM

What your current xpath pattern is test for is - get me all the top level elements whose name is 'Categories' and have an 'Id' attribute, and then see if any of them equal '352' (the Categories, not the Id attribute).

It should read "Categories[@Id='352']" which gets you a child element called Categories whose 'Id' attribute has a value of '352'.

/- Sam Judson : Wrox Technical Editor -/

mhkay · November 9th, 2007, 01:27 PM

Incidentally, you can write this:

<a target="_self">
                        <xsl:attribute name="href">
                          default.aspx?Page=141&category.Categories.1=<x sl:value-of select="Categories/@Id"/>&centerContent.Id.0=<xsl:value-of select="@Id"/>
                        </xsl:attribute>

                        <xsl:value-of select="@Name"/>
                      </a>

as:

<a target="_self"
  href=" default.aspx?Page=141&category.Categories.1={C ategories/@Id}&centerContent.Id.0={@Id}">
     <xsl:value-of select="@Name"/>
</a>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference

Ryan Moore · November 9th, 2007, 01:44 PM

thanks for the help guys.

one last question. is it possible to put an OR clause in my test="Categories[@Id='352'" kind of like you would in an SQL statement? or values seperated by a pipe or something.

samjudson · November 9th, 2007, 01:48 PM

http://www.w3schools.com/xpath/xpath_operators.asp

[a or b]

/- Sam Judson : Wrox Technical Editor -/

mhkay · November 9th, 2007, 03:24 PM

Yes, the "or" operator in XPath is spelt "or", just like in SQL.

XPath also has a "|" operator which corresponds to "union" in SQL. You can sometimes use it interchangeably with "or", for example

a[@x or @y]

means the same as

a[@x|@y]

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference