AppendChild Method (XPathNavigator)
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XPathNavigator.AppendChild Method (XPathNavigator)

 

Creates a new child node at the end of the list of child nodes of the current node using the nodes in the XPathNavigator specified.

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

public virtual void AppendChild(
	XPathNavigator newChild
)

Parameters

newChild
Type: System.Xml.XPath.XPathNavigator

An XPathNavigator object positioned on the node to add as the new child node.

Exception Condition
ArgumentNullException

The XPathNavigator object parameter is null.

InvalidOperationException

The current node the XPathNavigator is positioned on is not the root node or an element node.

NotSupportedException

The XPathNavigator does not support editing.

Appending a child node adds the new node to the end of the list of child nodes for the current node. For example, when three child nodes exist for an element, the appended node becomes the fourth child node. If no child nodes exist, then a new child node is created.

The following are important notes to consider when using the AppendChild method.

  • If the XPathNavigator object is positioned over a sequence of XML nodes, all the nodes in the sequence are added.

  • The AppendChild method is valid only when the XPathNavigator is positioned on the root node or an element node.

  • The AppendChild method does not affect the position of the XPathNavigator.

In the following example, a new pages child element is appended to the list of child elements of the first book element in the contosoBooks.xml file using the node contained in the XPathNavigator specified. The http://www.contoso.com/books namespace is specified so that the new child element is appended using the same namespace as the XML document.

XmlDocument document = new XmlDocument();
document.Load("contosoBooks.xml");
XPathNavigator navigator = document.CreateNavigator();

navigator.MoveToChild("bookstore", "http://www.contoso.com/books");
navigator.MoveToChild("book", "http://www.contoso.com/books");

XmlDocument childNodes = new XmlDocument();
childNodes.Load(new StringReader("<pages xmlns=\"http://www.contoso.com/books\">100</pages>"));
XPathNavigator childNodesNavigator = childNodes.CreateNavigator();


if(childNodesNavigator.MoveToChild("pages", "http://www.contoso.com/books")) 
{
    navigator.AppendChild(childNodesNavigator);
}

Console.WriteLine(navigator.OuterXml);

The example takes the contosoBooks.xml file as an input.


<?xml version="1.0" encoding="utf-8" ?>
<bookstore xmlns="http://www.contoso.com/books">
    <book genre="autobiography" publicationdate="1981-03-22" ISBN="1-861003-11-0">
        <title>The Autobiography of Benjamin Franklin</title>
        <author>
            <first-name>Benjamin</first-name>
            <last-name>Franklin</last-name>
        </author>
        <price>8.99</price>
    </book>
    <book genre="novel" publicationdate="1967-11-17" ISBN="0-201-63361-2">
        <title>The Confidence Man</title>
        <author>
            <first-name>Herman</first-name>
            <last-name>Melville</last-name>
        </author>
        <price>11.99</price>
    </book>
    <book genre="philosophy" publicationdate="1991-02-15" ISBN="1-861001-57-6">
        <title>The Gorgias</title>
        <author>
            <name>Plato</name>
        </author>
        <price>9.99</price>
    </book>
</bookstore>

Universal Windows Platform
Available since 10
.NET Framework
Available since 2.0
Silverlight
Available since 4.0
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