XPathNavigator.InsertElementAfter Method

Creates a new sibling element after the current node using the namespace prefix, local name and namespace URI specified, with the value specified.

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

public virtual void InsertElementAfter(
	string prefix,
	string localName,
	string namespaceURI,
	string value
)

Parameters

prefix
Type: System.String

The namespace prefix of the new child element (if any).

localName
Type: System.String

The local name of the new child element (if any).

namespaceURI
Type: System.String

The namespace URI of the new child element (if any). Empty and null are equivalent.

value
Type: System.String

The value of the new child element. If Empty or null are passed, an empty element is created.

ExceptionCondition
InvalidOperationException

The position of the XPathNavigator does not allow a new sibling node to be inserted after the current node.

NotSupportedException

The XPathNavigator does not support editing.

Namespace prefix and URI values can be obtained using the LookupPrefix or LookupNamespace method. For example, the following syntax inserts a sibling element by using the in-scope namespace xmlns:bk="http://www.contoso.com/books":

navigator.InsertElementAfter(navigator.Prefix, "pages", LookupNamespaceURI(navigator.Prefix), String.Empty)

This creates the new sibling <bk:pages/> element.

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

  • If the namespace prefix specified is null or String.Empty, then the prefix for the namespace URI of the new element is obtained from the current namespaces in-scope. If there is no namespace prefix assigned to the specified namespace URI at the current scope, then a namespace prefix is automatically generated.

  • The InsertElementAfter method is valid only when the XPathNavigator is positioned on an element, text, processing instruction, or comment node.

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

In the following example a new pages element is inserted after the price child element of the first book element in the contosoBooks.xml file.

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

navigator.InsertElementAfter(navigator.Prefix, "pages", navigator.LookupNamespace(navigator.Prefix), "100");

navigator.MoveToParent();
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>

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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