XsltArgumentList.AddParam(String, String, Object) Method

Reference

Definition

Namespace:: System.Xml.Xsl

Assembly:: System.Xml.ReaderWriter.dll

Assembly:: System.Xml.dll

Assembly:: netstandard.dll

Source:: XsltArgumentList.cs

Source:: XsltArgumentList.cs

Source:: XsltArgumentList.cs

Important

Some information relates to prerelease product that may be substantially modified before it’s released. Microsoft makes no warranties, express or implied, with respect to the information provided here.

Adds a parameter to the XsltArgumentList and associates it with the namespace qualified name.

public:
 void AddParam(System::String ^ name, System::String ^ namespaceUri, System::Object ^ parameter);

public void AddParam (string name, string namespaceUri, object parameter);

member this.AddParam : string * string * obj -> unit

Public Sub AddParam (name As String, namespaceUri As String, parameter As Object)

Parameters

name: String

The name to associate with the parameter.

namespaceUri: String

The namespace URI to associate with the parameter. To use the default namespace, specify an empty string.

parameter: Object

The parameter value or object to add to the list.

Exceptions

ArgumentException

The namespaceUri is either null or http://www.w3.org/1999/XSL/Transform.

The name is not a valid name according to the W3C XML specification.

The namespaceUri already has a parameter associated with it.

Examples

The following example uses the AddParam method to create a parameter representing the current date and time.

using System;
using System.IO;
using System.Xml;
using System.Xml.Xsl;

public class Sample
{

    public static void Main()
    {

        // Create the XslCompiledTransform and load the stylesheet.
        XslCompiledTransform xslt = new XslCompiledTransform();
        xslt.Load("order.xsl");

        // Create the XsltArgumentList.
        XsltArgumentList xslArg = new XsltArgumentList();

        // Create a parameter which represents the current date and time.
        DateTime d = DateTime.Now;
        xslArg.AddParam("date", "", d.ToString());

        // Transform the file.
        using (XmlWriter w = XmlWriter.Create("output.xml"))
        {
            xslt.Transform("order.xml", xslArg, w);
        }
    }
}

Imports System.IO
Imports System.Xml
Imports System.Xml.Xsl

Public Class Sample

    Public Shared Sub Main()

        ' Create the XslCompiledTransform and load the stylesheet.
        Dim xslt As New XslCompiledTransform()
        xslt.Load("order.xsl")

        ' Create the XsltArgumentList.
        Dim xslArg As New XsltArgumentList()

        ' Create a parameter which represents the current date and time.
        Dim d As DateTime = DateTime.Now
        xslArg.AddParam("date", "", d.ToString())

        Using w As XmlWriter = XmlWriter.Create("output.xml")
            ' Transform the file.
            xslt.Transform("order.xml", xslArg, w)
        End Using

    End Sub
End Class

The example uses the following two data files as input.

order.xml

<!--Represents a customer order-->
<order>
  <book ISBN='10-861003-324'>
    <title>The Handmaid's Tale</title>
    <price>19.95</price>
  </book>
  <cd ISBN='2-3631-4'>
    <title>Americana</title>
    <price>16.95</price>
  </cd>
</order>

order.xsl

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
  <xsl:param name="date"/>
  <xsl:template match="/">
    <order>
      <date><xsl:value-of select="$date"/></date>
      <total><xsl:value-of select="sum(//price)"/></total>
    </order>
  </xsl:template>
</xsl:stylesheet>

Remarks

The parameter should correspond to a W3C type. The following table shows the W3C types, either XPath or XSLT, and the corresponding.NET class.

W3C Type	Equivalent.NET Class (Type)
`String` (XPath)	String
`Boolean` (XPath)	Boolean
`Number` (XPath)	Double
`Result Tree Fragment` (XSLT)	XPathNavigator
`Node Set` (XPath)	XPathNodeIterator `XPathNavigator[]`
`Node`* (XPath)	XPathNavigator

*This is equivalent to a node set that contains a single node.

If the parameter object being invoked from within the style sheet is not one of the above, it is converted according to the following rules:

CLR numeric types are converted to Double.
The DateTime type is converted to String.
IXPathNavigable types are converted to XPathNavigator. XPathNavigator[] is converted to XPathNodeIterator.

All other types throw an error.

Applies to

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