Developer FAQ

How to run a C# function in XSLT?

Answer:

You can add C# functions to your XSLT in 3 easy steps (please check sample code below or download source here):

  1. Add the namespace declarations: xmlns:msxsl=urn:schemas-microsoft-com:xslt and xmlns:user=urn:my-scripts to the style sheet.
  2. To avoid parsing errors declare your function inside a CDATA section within the msxsl:script element.
  3. Call your function with parameters like <xsl:value-of select="user:GetDate('dddd, dd MMMM yyyy')"/>

Tips and Tricks:

  1. You can add required assemblies (DLL references), namespaces we are using with C# function inside <msxsl:script /> block (check System.Web in our example)
  2. Use exclude-result-prefixes "user" and "msxsl" to keep your output XHTML clean.
  3. To obtain value from query string, use System.Web.HttpContext.Current.Request.QueryString["Page"], instead of Request.QueryString["Page"].
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" exclude-result-prefixes="xsl in lang user" xmlns:in="http://www.composite.net/ns/transformation/input/1.0" xmlns:lang="http://www.composite.net/ns/localization/1.0" xmlns:f="http://www.composite.net/ns/function/1.0" xmlns="http://www.w3.org/1999/xhtml" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:user="urn:my-scripts">
  <msxsl:script language="C#" implements-prefix="user">
    <msxsl:assembly name="System.Web" />
    <msxsl:using namespace="System.Web" />
    <![CDATA[
      public string GetDate(string DateFormat)
      {
        return DateTime.Now.ToString(DateFormat);
      }
    ]]>
  </msxsl:script>
  <xsl:template match="/">
    <html>
      <head />
      <body>
        <div>
          <xsl:value-of select="user:GetDate('dddd, dd MMMM yyyy')" />
        </div>
      </body>
    </html>
  </xsl:template>
</xsl:stylesheet>

Please read related article "Fetching data in XSLTs using inline C#".

Detailed information about XSLT Stylesheet Scripting using <msxsl:script> could be found here http://msdn.microsoft.com/en-us/library/533texsx(VS.71).aspx