Passing XML as XsltArgumentList, can't select children

Tim Menninger wrote:
[color=blue]
> I have seen the postings about passing XML into an XSL transformation. The
> problem is that I cannot use any XPath navigation in the XSL that won't
> generate an error. If I use <xsl:copy-of select="$var"/> then the XML is
> output into the html page but this <xsl:copy-of select="$var/NS:Child"/>,
> and all other XPath navigation, fails with the error that 'The expression
> passed to this method should result in a NodeSet'. The real goal is to use
> xsl:for-each to navigate over all $var's children but can't get it to work.[/color]

You must be passing XPathNavigator to XSLT?
You have to pass XPathNodeIterator to be able to work with it as with
nodeset in XSLT.
XPathNavigator is RTF in XSLT, XPathNodeIterator - nodeset.
--
Oleg Tkachenko [XML MVP, XmlInsider]
http://blog.tkachenko.com

Oleg,

Thanks, I did try this but since my XML has a namespace I could not figure
out how to set the XsltContext for the query. Below is the code I am using.

//props is XmlNode
XPathNavigator nav = props.CreateNavigator();
XsltArgumentList args = new XsltArgumentList();
args.AddParam("properties", "", nav.Select("/FE:Properties"));

The .Select() method throws an exception 'Namespace Manager or XsltContext
needed. This query has a prefix,
variable, or user-defined function'. The XmlNode's XmlDocument has the
correct context set, so props.SelectSingleNode("/FE:Properties") does work.

I have tried to use the second param in AddParam but I do not think this
does what I need.

Tim


"Oleg Tkachenko [MVP]" <oleg@NO!SPAM!PLEASEtkachenko.com> wrote in message
news:%23JGjQ45$DHA.1288@TK2MSFTNGP10.phx.gbl...[color=blue]
> Tim Menninger wrote:
>[color=green]
> > I have seen the postings about passing XML into an XSL transformation.[/color][/color]
The[color=blue][color=green]
> > problem is that I cannot use any XPath navigation in the XSL that won't
> > generate an error. If I use <xsl:copy-of select="$var"/> then the XML is
> > output into the html page but this <xsl:copy-of[/color][/color]
select="$var/NS:Child"/>,[color=blue][color=green]
> > and all other XPath navigation, fails with the error that 'The[/color][/color]
expression[color=blue][color=green]
> > passed to this method should result in a NodeSet'. The real goal is to[/color][/color]
use[color=blue][color=green]
> > xsl:for-each to navigate over all $var's children but can't get it to[/color][/color]
work.[color=blue]
>
> You must be passing XPathNavigator to XSLT?
> You have to pass XPathNodeIterator to be able to work with it as with
> nodeset in XSLT.
> XPathNavigator is RTF in XSLT, XPathNodeIterator - nodeset.
> --
> Oleg Tkachenko [XML MVP, XmlInsider]
> http://blog.tkachenko.com[/color]

Oleg thanks for the quick response,

I got it working but not really the way I wanted. If you could answer the
namespace question that would be great. This is what I changed

XPathNavigator nav = props.CreateNavigator();
XsltArgumentList args = new XsltArgumentList();
args.AddParam("properties", "", nav.Select("./*")); //changed this to no
namespace XPath

Then used <xsl:for-each select="$properties"> to output rows

Thanks,

Tim

"Tim Menninger" <tmenninger@forensicsexplorers.com> wrote in message
news:%2397Q9R6$DHA.2180@TK2MSFTNGP09.phx.gbl...[color=blue]
> Oleg,
>
> Thanks, I did try this but since my XML has a namespace I could not figure
> out how to set the XsltContext for the query. Below is the code I am[/color]
using.[color=blue]
>
> //props is XmlNode
> XPathNavigator nav = props.CreateNavigator();
> XsltArgumentList args = new XsltArgumentList();
> args.AddParam("properties", "", nav.Select("/FE:Properties"));
>
> The .Select() method throws an exception 'Namespace Manager or XsltContext
> needed. This query has a prefix,
> variable, or user-defined function'. The XmlNode's XmlDocument has the
> correct context set, so props.SelectSingleNode("/FE:Properties") does[/color]
work.[color=blue]
>
> I have tried to use the second param in AddParam but I do not think this
> does what I need.
>
> Tim
>
>
> "Oleg Tkachenko [MVP]" <oleg@NO!SPAM!PLEASEtkachenko.com> wrote in message
> news:%23JGjQ45$DHA.1288@TK2MSFTNGP10.phx.gbl...[color=green]
> > Tim Menninger wrote:
> >[color=darkred]
> > > I have seen the postings about passing XML into an XSL transformation.[/color][/color]
> The[color=green][color=darkred]
> > > problem is that I cannot use any XPath navigation in the XSL that[/color][/color][/color]
won't[color=blue][color=green][color=darkred]
> > > generate an error. If I use <xsl:copy-of select="$var"/> then the XML[/color][/color][/color]
is[color=blue][color=green][color=darkred]
> > > output into the html page but this <xsl:copy-of[/color][/color]
> select="$var/NS:Child"/>,[color=green][color=darkred]
> > > and all other XPath navigation, fails with the error that 'The[/color][/color]
> expression[color=green][color=darkred]
> > > passed to this method should result in a NodeSet'. The real goal is to[/color][/color]
> use[color=green][color=darkred]
> > > xsl:for-each to navigate over all $var's children but can't get it to[/color][/color]
> work.[color=green]
> >
> > You must be passing XPathNavigator to XSLT?
> > You have to pass XPathNodeIterator to be able to work with it as with
> > nodeset in XSLT.
> > XPathNavigator is RTF in XSLT, XPathNodeIterator - nodeset.
> > --
> > Oleg Tkachenko [XML MVP, XmlInsider]
> > http://blog.tkachenko.com[/color]
>
>[/color]

Tim Menninger wrote:
[color=blue]
> args.AddParam("properties", "", nav.Select("/FE:Properties"));
>
> The .Select() method throws an exception 'Namespace Manager or XsltContext
> needed. This query has a prefix,
> variable, or user-defined function'. The XmlNode's XmlDocument has the
> correct context set, so props.SelectSingleNode("/FE:Properties") does work.[/color]

You have to provide XmlNamespaceManager to Select method to define FE
prefix:

XPathExpression expr = nav.Compile("/FE:Properties");
XmlNamespaceManager mngr = new XmlNamespaceManager(nav.NameTable);
mngr.AddNamespace("FE","FE namespace URI goes here");
expr.SetContext(mngr);
args.AddParam("properties", "", nav.Select(expr));

--
Oleg Tkachenko [XML MVP, XmlInsider]
http://blog.tkachenko.com

Oleg,

Thanks, got it working. I had tried this but I was using the prop's
XmlDocument NameTable not the nav's NameTable this must have caused a
problem. I actually have a wrapper class around XmlDocument that manages my
namespaces so I don't have to create a namespace manager for each dom. I was
using my GetNsMgr() accessor to return the XmlDocuments namespace manage and
pass that to SetContext but that didn't work. When you recreate a namespace
manager it works.

Thanks,

Tim


"Oleg Tkachenko [MVP]" <oleg@NO!SPAM!PLEASEtkachenko.com> wrote in message
news:%23vJtBl6$DHA.3536@tk2msftngp13.phx.gbl...[color=blue]
> Tim Menninger wrote:
>[color=green]
> > args.AddParam("properties", "", nav.Select("/FE:Properties"));
> >
> > The .Select() method throws an exception 'Namespace Manager or[/color][/color]
XsltContext[color=blue][color=green]
> > needed. This query has a prefix,
> > variable, or user-defined function'. The XmlNode's XmlDocument has the
> > correct context set, so props.SelectSingleNode("/FE:Properties") does[/color][/color]
work.[color=blue]
>
> You have to provide XmlNamespaceManager to Select method to define FE
> prefix:
>
> XPathExpression expr = nav.Compile("/FE:Properties");
> XmlNamespaceManager mngr = new XmlNamespaceManager(nav.NameTable);
> mngr.AddNamespace("FE","FE namespace URI goes here");
> expr.SetContext(mngr);
> args.AddParam("properties", "", nav.Select(expr));
>
> --
> Oleg Tkachenko [XML MVP, XmlInsider]
> http://blog.tkachenko.com[/color]