XmlDocument.CreateProcessingInstruction(String, String) Method

public:
 virtual System::Xml::XmlProcessingInstruction ^ CreateProcessingInstruction(System::String ^ target, System::String ^ data);

public virtual System.Xml.XmlProcessingInstruction CreateProcessingInstruction(string target, string data);

public virtual System.Xml.XmlProcessingInstruction CreateProcessingInstruction(string target, string? data);

abstract member CreateProcessingInstruction : string * string -> System.Xml.XmlProcessingInstruction
override this.CreateProcessingInstruction : string * string -> System.Xml.XmlProcessingInstruction

Public Overridable Function CreateProcessingInstruction (target As String, data As String) As XmlProcessingInstruction

The new XmlProcessingInstruction.

The following example creates a ProcessingInstruction node and adds it to the document.

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

public class Sample
{
  public static void Main()
  {
    XmlDocument doc = new XmlDocument();

    // Create a procesing instruction.
    XmlProcessingInstruction newPI;
    String PItext = "type='text/xsl' href='book.xsl'";
    newPI = doc.CreateProcessingInstruction("xml-stylesheet", PItext);

    // Display the target and data information.
    Console.WriteLine("<?{0} {1}?>", newPI.Target, newPI.Data);

    // Add the processing instruction node to the document.
    doc.AppendChild(newPI);
  }
}

Imports System.IO
Imports System.Xml

public class Sample

  public shared sub Main()
  
    Dim doc as XmlDocument = new XmlDocument()

    ' Create a procesing instruction.
    Dim newPI as XmlProcessingInstruction 
    Dim PItext as String = "type='text/xsl' href='book.xsl'"
    newPI = doc.CreateProcessingInstruction("xml-stylesheet", PItext)

    ' Display the target and data information.
    Console.WriteLine("<?{0} {1}?>", newPI.Target, newPI.Data)

    ' Add the processing instruction node to the document.
    doc.AppendChild(newPI)

  end sub
end class

Although this method creates the new object in the context of the document, it does not automatically add the new object to the document tree. To add the new object, you must explicitly call one of the node insert methods.

According to the W3C Extensible Markup Language (XML) 1.0 recommendation, ProcessingInstruction nodes are only allowed within Document, Element, and EntityReference nodes, when the EntityReference node is not a child of an Attribute node.