XmlNode.ReplaceChild(XmlNode, XmlNode) XmlNode.ReplaceChild(XmlNode, XmlNode) XmlNode.ReplaceChild(XmlNode, XmlNode) XmlNode.ReplaceChild(XmlNode, XmlNode) Method

Definition

Replaces the child node oldChild with newChild node.

public:
 virtual System::Xml::XmlNode ^ ReplaceChild(System::Xml::XmlNode ^ newChild, System::Xml::XmlNode ^ oldChild);
public virtual System.Xml.XmlNode ReplaceChild (System.Xml.XmlNode newChild, System.Xml.XmlNode oldChild);
abstract member ReplaceChild : System.Xml.XmlNode * System.Xml.XmlNode -> System.Xml.XmlNode
override this.ReplaceChild : System.Xml.XmlNode * System.Xml.XmlNode -> System.Xml.XmlNode
Public Overridable Function ReplaceChild (newChild As XmlNode, oldChild As XmlNode) As XmlNode
Parameters
newChild
XmlNode XmlNode XmlNode XmlNode

The new node to put in the child list.

oldChild
XmlNode XmlNode XmlNode XmlNode

The node being replaced in the list.

Returns

The node replaced.

Exceptions

This node is of a type that does not allow child nodes of the type of the newChild node.

The newChild is an ancestor of this node.

The newChild was created from a different document than the one that created this node.

This node is read-only.

The oldChild is not a child of this node.

Examples

The following example replaces the title element in the XML document.

#using <System.Xml.dll>

using namespace System;
using namespace System::IO;
using namespace System::Xml;
int main()
{
   XmlDocument^ doc = gcnew XmlDocument;
   doc->LoadXml( "<book genre='novel' ISBN='1-861001-57-5'>"
   "<title>Pride And Prejudice</title>"
   "</book>" );
   XmlNode^ root = doc->DocumentElement;
   
   //Create a new title element.
   XmlElement^ elem = doc->CreateElement( "title" );
   elem->InnerText = "The Handmaid's Tale";
   
   //Replace the title element.
   root->ReplaceChild( elem, root->FirstChild );
   Console::WriteLine( "Display the modified XML..." );
   doc->Save( Console::Out );
}

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

public class Sample {

  public static void Main() {

    XmlDocument doc = new XmlDocument();
    doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" +
                "<title>Pride And Prejudice</title>" +
                "</book>");

    XmlNode root = doc.DocumentElement;

    //Create a new title element.
    XmlElement elem = doc.CreateElement("title");
    elem.InnerText="The Handmaid's Tale";

    //Replace the title element.
    root.ReplaceChild(elem, root.FirstChild);

    Console.WriteLine("Display the modified XML...");
    doc.Save(Console.Out);

  }
}
Imports System
Imports System.IO
Imports System.Xml

Public Class Sample
    
    Public Shared Sub Main()
        
        Dim doc As New XmlDocument()
        doc.LoadXml("<book genre='novel' ISBN='1-861001-57-5'>" & _
                    "<title>Pride And Prejudice</title>" & _
                    "</book>")
        
        Dim root As XmlNode = doc.DocumentElement
        
        'Create a new title element.
        Dim elem As XmlElement = doc.CreateElement("title")
        elem.InnerText = "The Handmaid's Tale"
        
        'Replace the title element.
        root.ReplaceChild(elem, root.FirstChild)
        
        Console.WriteLine("Display the modified XML...")
        doc.Save(Console.Out)
    End Sub 'Main 
End Class 'Sample

Remarks

If the newChild is already in the tree, it is first removed.

If the newChild was created from another document, you can use XmlDocument.ImportNode to import the node to the current document. The imported node can then be passed to the ReplaceChild method.

Notes to Inheritors

When overriding ReplaceChild in a derived class, in order for events to be raised correctly, you must call the ReplaceChild method of the base class.

Applies to

See Also