XslTransform.Load Method (XmlReader, XmlResolver)


Loads the XSLT style sheet contained in the XmlReader.

Namespace:   System.Xml.Xsl
Assembly:  System.Xml (in System.Xml.dll)

public void Load(
	XmlReader stylesheet,
	XmlResolver resolver


Type: System.Xml.XmlReader

An XmlReader object that contains the XSLT style sheet.

Type: System.Xml.XmlResolver

The XmlResolver used to load any style sheets referenced in xsl:import and xsl:include elements. If this is null, external resources are not resolved.

The XmlResolver is not cached after the Load method completes.

Exception Condition

The current node does not conform to a valid style sheet.


The style sheet contains embedded scripts, and the caller does not have UnmanagedCode permission.


The XslTransform class is obsolete in the .NET Framework version 2.0. The XslCompiledTransform class is the new XSLT processor. For more information, see Using the XslCompiledTransform Class and Migrating From the XslTransform Class.

XslTransform supports the XSLT 1.0 syntax. The XSLT style sheet must include the namespace declaration xmlns:xsl= http://www.w3.org/1999/XSL/Transform.

This method loads the XSLT style sheet, including any style sheets referenced in xsl:include and xsl:import elements. The style sheet loads from the current node of the XmlReader through all its children. This enables you to use a portion of a document as the style sheet.

After the Load method returns, the XmlReader is positioned on the next node after the end of the style sheet. If the end of the document is reached, the XmlReader is positioned at the end of file (EOF).

If the style sheet contains entities, you should specify an XmlReader that can resolve entities (XmlReader.CanResolveEntity returns true). In this case, an XmlValidatingReader can be used.

If the style sheet contains embedded scripting, the script is compiled to an assembly. The assembly has full trust. The recommended practice is to provide evidence using the Load(XmlReader, XmlResolver, Evidence) method. For issues with the Load method and style sheets with embedded scripts see article Q316755 in the Microsoft Knowledge Base at http://support.microsoft.com.


If the caller does not have UnmanagedCode permission, the embedded script is not compiled and a SecurityException is thrown. See SecurityPermission and SecurityPermissionFlag.UnmanagedCode for more information.

.NET Framework
Available since 1.1
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